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 0x26844d2483698b5c8f24f38d72bb99c6592796e10ea8ebec1cf51ada9fb55a48. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47487c86-f0d4-42d5-b8e9-4de4590bc354.json and https://artists.proofprofile.net/proofs/artist/47487c86-f0d4-42d5-b8e9-4de4590bc354.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 0xe6fcede27650b3f34c33f89f5c8460999a5d8dd0dbd1212d3f8162aabfe4c815. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFYY1979938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a168d09dd14b8a5bb0eb976b32509eefd4eb01457b6ce106b8622fb750889f. 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/QZFYY1979939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87783f66df3fd19fb1869912083971ed446dc8e8fadab74a59049bb28716f24. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFYY1979941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c8bed317d9577e715430197c14de059c5bd9240f9a7a1000ade45356e66336. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZFYY1979943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8e8009058d89054c0272c2bd4944874dca14cdfc6fe3cc5d458ac9c2be6d0e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZFYY1979940.
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 0xe29ac7efee5f7aabf801ebc9d4da2f3b977c7f8730cfb797dba53bc2cb642000. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZFYY1979942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f40a596e828b6955123e3b7f9248b104291e3f8a9c3e5238bd3d3090ba33870. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZFYY1979944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e252c38e82f1e5ce7a52e5e044eaf0fab0baa1fc10be476075ac28e9118621. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZFZ71935897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c75a44273d8a27423bb340fadf127b082cfdfdb6ef7edda247a9e7314b5465. 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/QZHN91926167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bc65ab0357979d1605090bad7b31d96c96546d3e7286374e7a9b4b0ebb170f. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZFYW2095237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1afb53fe896f43b7c5e923a750125a30a63e03218cbf15bfd78597b824f7c46. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZDA82098911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c8fbcdc4c1a2829f3bb66f89b9f71e0cb7a1a58582cb66dfe0341ab384bb91. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZDA82098913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c51183cf78d1c942b6d6b7dcde1003d44151ad2f9e02c69089bb45853e933d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:44:56Z), 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/QZES82012826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad01526d2166a7102b5997b9b483a60d389fbe77ac091c10ef587fdf58d8a061. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE5BU2313486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4b4fe8ccd4a918f87503164f039c7dfb66e53e276b86d7d7c25637842b3ce7. 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/QZTAW2362237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b13b5deea1739f9003779469869c05089ce8d95848024849a554a252a99c2d7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE66N2220242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb7d78b0477c5ac129da6e4dad2c94a25502ee5150e907423a6e4364776458e. 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/SE62M2252485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7d5d3879ff0867a0e075ebd0f9f33c62ddcf3354f2729e3ae287f7e2598087. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UKZGC2304928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb7d78b0477c5ac129da6e4dad2c94a25502ee5150e907423a6e4364776458e. 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/SE62M2252485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0315a5b0c54c935f0bf6cc0585ef32132f07c094f5195a7fe12c1271c67ad2a1. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:51:45Z), 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/QZNWV2022978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8198739d8105ff95526be5f6e05e2b9935e62997dd12afd169dd721e3e7c9a6d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:06Z), 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/SE6HN1960474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff52fda22f16610504b20b100dc037c7d7d9fb67a5f7f4b5e79faaf62d0795e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZN882179741.