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 0xd5aea905d54f5f7167698d3b72518544cd77fb4faf78a1069e3ef080abf20ca7. 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/a40dd94b-0655-4a15-8664-eb005b484e96.json and https://artists.proofprofile.net/proofs/artist/a40dd94b-0655-4a15-8664-eb005b484e96.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 0x79c8b6526a26e1d7e727fa0d7668004a33cf045b09a9c30c0c1b1e62b46deeeb. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/DET271370402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ba066054036f53f192a0dd0ffd359549d26855193ed99a1a4cd9edf7a878fe. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DET271370403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f9ac10924508d0da0efc0542f280bb6be8f13e94d45d94d6fb58d5a71e54b8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DET271370003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ddac64b76f98699364e49a3de419c4ce0f747cf3f3a5e12302e7f4397c3f0c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DET271370008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145ced38777a70ec4894699f20333b143d6528eecdfb03781b90e04f03773b12. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DET271370203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de954b08313d9b56a1f498cc98f88f320281db61ff32cc9084346a9b1527f5f. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/DET271370204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67513e781a4031fdff271466f99eb1aeff626b5f8cf44bdc4a6797d6b4795d35. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/DET271370205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e42c8cdb25d22abefe2ce7cfd7f42eba4cc4ac4431f4b8312f00cbe2e454dc. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DET271370206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458d8bee882cb26aa37172a1406cc0813166ba3a067121a80d7d229ed343433d. 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/DET271370207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ded2696ac7fc8ce654f0ae6cfc1d12481e3050226f6388d7a7905d19b3c5ca. 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/DET271370208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061740db4e0ea503373af8e300cc502a013b86f2d6d89252b6503689ecd9351a. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/DET271370804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b671416949bfeeba09b66e25c45c9e2a73daf02c743d5e770c2f805abf8f2f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DET271370821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070d618f6559727f7a6de3d91a9a9b50764997806650094aa08eae80c7a386b3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DET271370601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bda4a3a05cd6a66e2b89ad0f1267c33ca360096e97e769691cc38657087b7b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DET271515603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11edf667e3de61251ddad3408504d62ca0444f296a3a90ba37ca28ddbb298e34. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DET271515604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b75685125741ce7c1dfe3f6f1c80a13e9c9bbc6f05a003b9c334f762ddb2ab2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DET271515605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3fb97f35ee177ce13a5f2dec2d770ee61276a92739f900c9df6c4ab60cba19. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DET271515609.