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 0x94abddebac9768379aca9bdf6762d993755c6548a1b5caa804bcacdf90bafc77. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06feba51-cf0c-4fdc-a15f-b0ec2a510dd8.json and https://artists.proofprofile.net/proofs/artist/06feba51-cf0c-4fdc-a15f-b0ec2a510dd8.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 0xf7df37dbc59953c1daffcd5d69cfea74006325e8483cf3a2a0eb869d02db387e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:46:21Z), 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/DEA432400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e12989e1071f72eb8b7465d427ab7c47d2f1806b64cbf3be894b0b5790e098. 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/DEA432400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c74ca303ca7ffc440723e4644c0fbeee48f0999244103e51d7f4c6026bc583. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEA432400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e5895448bcda6044131aff3119ebb2618d2ad4ebc67ead607832f0418d12c6. 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/DEA432400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf249a4bf7f425ab104f17431705265bd1398e2d79725e37e2e0531cbd06af1. 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/DEA432400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc5692a35fe698cf36600d75ac1375385cd498b00f4d4f94987ee8b54071bf1. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEA432400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1863f289ced947d9e45a7c3ac8126f4f834c3d3dbff5ccdefd8880a8f9059b8a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEA432500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0387e5ddc381ccab0e32997e7808158b3208d81710314873d7a340275ece84. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEA432500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82106eebf07d4bca582e74ca7177f31d68aa0e753948aabc4800b05a7bb3509. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/DEA432500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764b8b1fe5f233bf9cc47b8c3c39eb2dff70148103e1aba09903b5deff91132f. 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/DEA432500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc326f8408dc730aa41728b9e40c318279cee837d405cba7a879f71d1db7985. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEA432500091.