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 0xc3cf790f2c175a0f06e7fd22e3f175d8cd6fbbbfcc897f34525787cb829b8458. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5355fdac-f075-4171-b1d1-d6bccfedd31c.json and https://artists.proofprofile.net/proofs/artist/5355fdac-f075-4171-b1d1-d6bccfedd31c.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 0x345340893cb3830fb373dea6a51a2ecee0483abf2c67b01f4ab71012c1774985. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:49:52Z), 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/TCABY1414988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00f88aa26da373943c0a5c175b12386ec4111bc4d2a58b59c109f4895dee623. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USRC19401460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3da920e5257fd853a4c7494b73c9418d2ecd4dedcf4ec0e1fd2424250b0da9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USRC19401457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177b1a6f6e9751ac5e9f7882f07bb644008fd15319bc5ba5df95852c4c354ae9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:20Z), 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/USRC19401458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27324639edd75f9d7968c622d76f9c6b26b0306ab0af3c1359cf9d26edb4fd1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USRC19401459.
Take Enough Home (Farewell Concert 1999) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73834a55d7cc07cc25965e890b13de3a50f493d27b2b31d66bb846d6333aa8b1. 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/TCACB1415787.