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 0x87518ce41ee306c788135b205a16c0a644a21f25509a7ab1c8ee3ede03e1d551. 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/62752f8d-24fd-43ae-969a-184fe5bc2447.json and https://artists.proofprofile.net/proofs/artist/62752f8d-24fd-43ae-969a-184fe5bc2447.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 0x9df3c44a428906783acd92ddcce0703993508918d7066bd781d1186c33040db9. 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/CA5KR2450031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bd45e8e0ae8547cd81d9c61a03cf6fcd5cbf1f415b5014b11af54ddbfe2a1f. 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/CA5KR2450032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e05233bc9927b6285da4f702091211cb84c458f6de199e77e1e6475314924b. 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/CA5KR2453538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5e6139fe9815f7807333d806123ac59413fbbb966de70bf259e4c766ae51e9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA5KR2453533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd5d55634454e075a4fcc07ed876ce3024e5788e687c9c8474230fcc6334631. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CA5KR2453534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d323c1d3930efcbb497f143552779f01c57712867475f3eb0af2f1b0af2315. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CA5KR2453536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76155689c0c01da4f86b1ab6191caaae5c6a6579e5f1843594e6558a90453679. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR2453565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07d0561b8912bf9f3131c758118258b5b6d27fce5acfc0b80ffe9c3ed2a5e50. 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/CA5KR2454114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010b1a8f9a5a076125eeaf4ea23cfcadf8f6e86dd67038e14fc7a061126f0410. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/CA5KR2454115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23239f045164557845521e36dad72aa499fce67e50b47b6e4a36ef9170615aa1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA5KR2454097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb121cb4ec6cf9a6e9be22b9e9f075bcedce9ec600161bb3efe8c2fecc69dfc79. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CA5KR2454098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4966a5f7db31c57b156e7363c15d83d9a378d4a4f46acbbe4a5d106e61c2815f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CA5KR2454112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f449316c1ed53845889ebc857a9bbb38855567f15b6a09c92f96eee87fe43ed. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:29:53Z), 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/CA5KR2454113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a7bee2b1fdebbe543de5b1439bdc0a52395a41915312465350e7c99426b3b1. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:42:26Z), 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/CA5KR2454110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43d161fd2fc6f984d1567669e3c30afb6a2808c7d245db0869e7f59297ecc36. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR2454111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c06d601de66ef8f700973ad0eeb541b6166c88ddb06ba8bb4167e083460783. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/CA5KR2454117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb89875c9b78d8b07bfa6ef073985797308cb4c9655050a48bd5cf141a09ba5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CA5KR2454865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7fe6e8eebe35dd3bc590b9c0ef07028db068c486e19a281cd08411a0058147. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CA5KR2454866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e1bf360b3364fe442bc269fa227b9ff7abeef9803d72b4c0de20b1ffd96fa9. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/CA5KR2454864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a7566c23c76e645611f20f81c74690c855af94a5660edadac8521ada778aa8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:14:35Z), 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/CA5KR2454867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b16f42c301973896da51a5c5fc3c5424798d01347759f986f1ffcb0c7208b54. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CA5KR2456393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6622113da2a0c50295949349feb9ee877dafd00463c6eed9fa5e62ff0a62037. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CA5KR2456402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5cf8718fdec75fd090d615cd16d270421a5d830982ba128b152a1874514b23. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR2456399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597e28fc76709f0eec82726605e987d1c602e63af6a0e695436904dd964131ef. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/CA5KR2456400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb318fac52c5238245e5d4b80a43d45da38e6ec1c21947ae9d74c9fc74db4baa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:42:51Z), 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/CA5KR2456397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb23be53c9d2efbb4db7a9c341f0ff279efe127653c383154fcb8fb383c116ee. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CA5KR2456390.