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 0x634d2c86fff50016eba2241035100bb69c909b37759b99398b8823c7b497c371. 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/830b0f77-d1c3-4249-b092-cf135eff0033.json and https://artists.proofprofile.net/proofs/artist/830b0f77-d1c3-4249-b092-cf135eff0033.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 0xae0480399784cbbf7220e80242ac309f8449da94ebfdbfaee6f06650bf4e161c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:21Z), 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/QZMEP2398074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83d20e1d59cd8fec488ff9cdd637663394d92b857b3f5e3c17aae15ee8a0e69. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:23:32Z), 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/QZMEP2398075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9791536737e692f7f1f5590790eeb8cc66e6d69f038052d53da883cf4b07a876. 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/QZMEP2398077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102d3a75024ab2b11879ed1fafdc5ea31a231503e7939ba130a3445f3f92e384. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMEP2398079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ceb28178c2372d97acdec1102495d10f70a9192026c14548a0a364eee79ba78. 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/QZPLS2119504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad38be6e68c207cddd490a28d9ba6af443d3751a2712bea83329857ce9fb6ad. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/US3DF2404450.
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 0xf3f8ff4a4e16ae69ad4aa69276b8b47b3fa743ca7fd05f89f18d5ca8f951cc00. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:18:33Z), 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/QT3FF2536113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ebf290b42cccdc2d6a6fb7ad78d2d3b60e1392c38455df49ea29601a4dd904. 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/ES71G2117081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cb9cc6b35199993a688aec8b6aa799f6936ea586896aab6b55defb5357007f. 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/ES71G2117084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0642cce02ce22b9d767303fd3d1ff466d6b03f81d88f6e7244cd28e12921452c. 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/QMBZ92079200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fec8e279881df790d354284175507d57c599503612990f696ffe76a05daf640. 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/NZPB12400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec6d4e76e70c54e7b5b1a860283399a9846bc99acbd3ffd19884903c6e79c34. 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/GBKQU2403795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4c0539b19e664c08cc3b87f40cc3497375dbd823fd6f34a8c5ea6e04534723. 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/CAN112100235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe67c60b683ab68eef00dd68b4be60b77ee5b73bc9efae28b0ad81fe642a1160. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZK6H2089275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7d08a10d81a9b683865c6a567e8170fc1ed9ddc2c5bcdf65449f007757d198. 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/QM7281845405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e12970300450d0bd056d27d60faa4da569937e8acf07f8f4e27c2e1d8f581da. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/PT7EX2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1e8d83926fa84288530dacb7b15960d5a46861efa58fe9c80fc7f078898117. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/CAN112100245.