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 0xa522cbbe2c6a515074273f6394058b41c476c1f023c9f9dd51f8b8ee6533b860. 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/1e11e5a4-fc94-4682-b9a8-152dbfadde54.json and https://artists.proofprofile.net/proofs/artist/1e11e5a4-fc94-4682-b9a8-152dbfadde54.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 0x2e6fe0115db9df345be64ea3a9c600299c8924a0bd01e02fce228dc815cfc321. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEDU22200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e9ac5d70b7ce4714a01b858375cff8771ebfd39af6f89711b68fd7184c3fc1. 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/UKQNV2300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d506d2f4d54e1ee42c8bae1ab32ad0cb139bd665f8be35862edb4795f59cb4c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES71G2238019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23cd141da2b1cc51352aef978ab49073134663fa271ef65c91f098e7f3a192b. 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/ES71G2238239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5575a729830737999b4ed6de03a7f681710656d8b76a362f8619a35ba2a4eebb. 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/ES71G2237555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe344545780ee32d8410480f0d691373a720a041f23a89e6d39aebd96479d3062. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2238241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d47b1a0b0fbbb560bdd02540c6bcb83273f0286fa8851fa596629472597d7c3. 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/ES71G2238242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2782e0a7729c81564dd9be79e76712803a14d9b6b0606eaf8457d5bcc6a67c6f. 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/ES71G2238243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d506d2f4d54e1ee42c8bae1ab32ad0cb139bd665f8be35862edb4795f59cb4c. 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/ES71G2238019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a3d186357a6168fb08f4b4a66723e467eb69c91559cd380f548138dfbe07ec. 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/ES71G2238245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730a7e6a93df1f837725289757234012f7590c78a69ed9582338fe4c657e5762. 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/ES71G2238246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847026aff3798e0b94878897f73708d9f5c941ae82a6da2c73a491379c5e46de. 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/USHM22313226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afe98ed6680c3e85ceaa6cdb8de1ebcfd3f9fbc7321913eca0c9b6167b73f2b. 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/QZZ782484490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f472c57edc18af66457f1a146b4deb26c994d137cbb65d2035c7578133385b. 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/QZTBD2480029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878997498741483eee346b4b2e26c17c5097582455e4ea4817c91595172ff5ba. 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/QZFZ62426261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7ac45a23e28f95f337edf99abecb6b5d9537920eb8fb77785fbf23fb78b8e9. 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/QZTB52226441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3348d9c4b56be4e3d6cfc4544baafa1fe37e1faa342ca10e28e478d215b5c741. 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/QZTB52226442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00302188f774b29f6f5959650c9afe7ad8c0ab19186e685ff5f85ed37938b1e4. 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/QZTB52226443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a303d76b7cdd1727589053d34c91284a373a74452965d7b60a8ec279a7cb39. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTLA2405903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2650e697dfe01aa9f40a679fd09d527651fb039c2264a55bb91e878a0178e805. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FRR642301330.
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