1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8b025853ddbe401ab28bef5365e757b80eedf7f98972ee6b72bc742dba971e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed559e48-4e88-4839-a81b-6e2dffa85b2b.json and https://artists.proofprofile.net/proofs/artist/ed559e48-4e88-4839-a81b-6e2dffa85b2b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb410874d0d728392248c11d9bbfcd3e3968e0b4f4142d37ed37a07681b6486dc. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUNV01800191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79f525b339cb4d8fe648f55e6f4dc7e3cd366ee99f945ad964484de0096e1fa. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:54:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7YL1998502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53596fe77497974e0684e21d012f0210ef37f715031e93e26d1ea8f99e033bf5. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:03:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7YL2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8e58fd723af58ceebbac9922076e77d2326a4c6a2b5dc8a260c4f6ea3bdf67. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7YL2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e233169258ec074169946d9b8d6a6ca7b3942c0f4717a12882d14c54ce932a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2151085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b009c75aea11c3784276f1592fd93edbf243567672c5452e7192832fb2eeeff. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2151086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5d72935c3e36c3d6c1731edd6a702c96b9a9b392bf7948fbd0a9ae26da169a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2161700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dc96db8606360301c8aa64af1d493feb67b71f18711bd77d0490f92f325dc2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2183769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f9849cbcce7c1f5c4c250ec9fded298569ba6a1e8a3460311fc70e719ea735. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2188335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86e73e562938e46bfa9e1909e2a76af318d37872ee3a113569776d0101f7e49. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7YL2100119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2f76d9011b7aba36907b964380894cb9bb7ab3f68c8c95970f2365093b616e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7YL2100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d3fd861b5deba42a99a7c5279109edda873ff8eaf572c32978cda9d1d0a63a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB2LD2110312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a957a7fcd98b43f6c9e275deb4412f27e946c2bfaeda33e710e1d4f20bba4b5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB2LD2110327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81e7772406d0bbfdd14e79f075b2caaa47b120cb42569cf7650d1a67604712f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB7YL2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc7e8aed2d576c24dbcf772d7102f638c4e596c4d1e34ec5ce1f374d83b0387. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA6D22200256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ee9eb123107a4833a954c5d09faedfc3681d0a82d590a1259db1acc5ddbc4b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA6D22200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa1c49920ac8a545d2750edf6fd9621830b07eaabc0867497894eab633c653a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA6D22200258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674995e943800bc239d767e25d3145e0bcb3b11b39fc96f94bb9c2bc3545ade1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2312291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca48e2e707b1ee89e1c3b0ae7c126ae08fa7d559aa50c72dfbfc3e591bbabf27. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2313759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b73535ae89e9f2e8d064d273e067fb8a62550b782141d2f5f61df4e9829162. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2355171.
Check This (with Kuhlosul) [Leotrix Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba35528a9316bfdcd1e37178c42a70057b2977aa2a8f5875f6062692b9f43bdc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2367593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31c5c309aa13788e765964ee13c4e2e766493f0ac7db07470b58fb4f4c91571. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2367594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd874c5618b9621d02052711410b680c05a293095ac7dd0dccab1414f3d8fc2b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2367596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60672c7d16b4594c4f52cbaa3438fcdcdea02f98284d98488f296f7086626629. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2367597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85ef81022e28546dffc938abe39cd5a83e4618f361a07aad8318edb2cc3b98a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUK3B2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262e28f5cfff332d37357b95eb8daab70e1cad642ca0faeb3b8e04c8c3be4b25. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTGW2400348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f80f9619e39e6db5f7f5521cdbb9035aad250e3ed4c9410f7bdaac1cddc96c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTGW2400349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55d09faf42160f08c4397f46af33fc43cf6b4dd3478e466a47ee58fa9c4cae9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTGW2400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5f64500548175feba7f9dd9c364d52218d7918e2efc19342f15adcd5d2edc6. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTGW2400352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc430bafd9bdebad025904e5ad75eb26c50be6630504202a16719a8db776f273. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:54:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTGW2400353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7c06a5d7f457c939e2d8f5b506ccd172542427063b5646292195991856ea03. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTGW2406045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc994b637686fcc956296cb09e2589f28e258239df9d3c0c1d39b9cd56cbb43. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTGW2406046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf447dc7dd8769849cb92856d41b0793a4b4131cfd0c3af4ac8eabf2a4e22479. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEXH2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd851c639339b1cab30ec6b29dfa26ebb3a7977e30da2a2d388455d330f9029. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:24:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLRD52264078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd851c639339b1cab30ec6b29dfa26ebb3a7977e30da2a2d388455d330f9029. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLRD52264078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27083d1e975050fff9c053c69d1b85c1ebdf57c9524617c54d6b37b7961db32e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAUM82100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8335188993bd991b7f517837e00b716987c0a8dc5b2810ff96bca2050f29f464. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHN2071269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5872e560add50d9fe9bfbbc56310ae30bd3f5e060ec1c61acbc798c7a40c6b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB2LD2320278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f40800195a459a8a9fcd02bfd6605a5388ed84b137244be5ab6bda00178756. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB2LD2320279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c673d8a922dc747f1103688700be3dbdca31560451d322fbb8d0c50d909bb1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB2LD2320280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85ef81022e28546dffc938abe39cd5a83e4618f361a07aad8318edb2cc3b98a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUK3B2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088ce0d918f707d32a0206d82434f67b7d03c5a535539feb03b127d67b1e8852. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CADUT2000003.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251b88a29dca163378e2cbf77f667d3c91acb6bbe15e92be4a3d9a57640b199c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1964807.
Check This (with Kuhlosul) - Leotrix Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92573783ae8eb9ede7f7b7a4a007ed176bc9379405e7b01ed6514d739418e14. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDM32353412.