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 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 0xa1d01e77aca41d774d73bbb0b255972fedd29543273e1366eac6d7bfb1203c6c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de9323bd-a3ef-45be-b7e1-820a189ac9fc.json and https://artists.proofprofile.net/proofs/artist/de9323bd-a3ef-45be-b7e1-820a189ac9fc.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 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 0xf1e3040a76143952647955141f1c1e27e9a15c72ebd53f9dd28e698a7022ac53. 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/QZJRB2211157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d095c70b51a40ad2c64bd85b45d0afcabbd157cf837052fae5c93b5a6bc41e6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZDA62329030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4637705815603d58e9766137d37e9b4f963593709ac2a23d5b2dd5f54e40cc. 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/GBKQU2339298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab48cf99957bb472af684b50b1cacc14724daa74518f77e6abd168b5494d3bc. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZMHM2379237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0006fae1e907148c71fa02acda171968caa934b542640b32be6992d798b37611. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFP52316004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8a8c4cc64accf9f035d7a5d9032fee7f82748070c20a8a073ad97c2ec7cffd. 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/QZTAY2367817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fa09c9afb419735eb3b3dae342c0d868de191c8b11915074e70b67d29d12a2. 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/DGA0H2314610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72788d1290cd6bde53e2a4e368f84b147f676adbb0a718f071b11b7fe4ddb1fa. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0R2308588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434fff254616e1ccc174ce0ba10b9dc361cc8ff3d427d84f6947c25c72ddfc53. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0R2308587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140acfd9e607fe1d9c578b8beff1efdaf87fb767b69678151196944714468336. 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/QZHN32495324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed55bb57f19c1a1c837bd8021fbe2dbfc3a1b933ce24f16d7b0c6b86baf44d9. 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/CA5KR2446768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0efd59e2bb4b6d97a8da4721488e2898ca9a3652767d376b29583e9c6c93c5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CA5KR2446769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a23115a85f18e80271bf43bf6ed8d3b481e8d53b8a86ab8b955dc435958f84. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/CA5KR2447730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32602e08d3bb0a774b67694db7b30126c2d2b53e2a071148fe952f7add785f3. 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/SE6I32426471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efe6483006865e13c87db09b96e617e0bdf94bfa27dd466e08993a0d38d5014. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/SE6I32438241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3499fcb273313e8b27dcc02f7b5baff4e04e9145b1944bb4c8c19f12ee9de90. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/SE6I32449383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d8b371498c30db57ce4e5b78dbbe03f1f71bf048e1acbcfeab5ea6ef751586. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/CA5KR2487681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c37a9615270dfd669222afd6fff2d546c27f20782bc5ffdccd48c8336076dde. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/SE6QE2424911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b048476749d7ec6e6a8b0117443feed39702773e5fd3390bbf61ecb460596a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CA5KR2497776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d2d573271ccbecd3eb7a80a49cfb145e7b9a65c2feacf071e33e56ca44cac6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZH5E2470490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b56de258a68b85b368f99ae44198405a2a46f69e814faa05319a229889ce9f3. 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/QZTGW2403100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72568e7129fd9354e21bbf0b951c73e1c391c424e4ab83df8e18a3f72fe8072. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTGW2404439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac589f585b3e9d05f7427d35115d726972c6c3461338e1d222ed73de80bd646. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTGW2404440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639341f6c02e3269e4113f4f2749d802c4e5874357222733c7a5f58775698edc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTGW2404441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf689fff8b0069f39a71448dd6e1e7ebc1b638a479bd43fd12e06075e31aa31f0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTGW2404442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb617b0af353b8dd95a955ed10f27be20024ef48df5a010c70bae05865f8e80. 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/QZTGW2404443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcaab018f16d16e650f1477eb0fcfa2c2afb857699c64316853e5a1d5ebea4f. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTGW2404444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a119afe179301479f0132ae535624c870ff926287a403ee21290fef9d80b39. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTGW2404445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1a30f1e8d391d5ae463573774164197c06b4f030abe3a7b8b349984ce53f78. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZTGW2404446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ec8509f83dc69826aa5cd3aeae75525647e691f8f07558a4241286214a5ca5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTGW2404447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247aed26959f77d718e4b17f11684f8708de94d85810c480ef051cd4cda73333. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZTGW2404449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdf924dd04b45ed0f21d6f92b5020d36cdbf90eaf2e544cda6390d7c7e63768. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTGW2404450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48cef61b8b5d4783a68c65ef4b54291bb5ef4f42c18af6d440d385551df48e5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTGW2404451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295a230d6c9537161f08f3d57bd71f1279d18b9f5344d3fe7dbd989798ba7919. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPEW2447286.