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 0xd7af755960ac97230128b9dc6dc65fa5fb7569b5050799e9a03f878d5fc5746e. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/859e828f-2ba7-4c26-a610-37b81567d9b1.json and https://artists.proofprofile.net/proofs/artist/859e828f-2ba7-4c26-a610-37b81567d9b1.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 0x49e445f0b677e3d7ae87c63022b0c6e04c3949cdb43888b6ebba2f19a01a232e. 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/QMDA71587786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e23d9dbd265e2c4216e44e241c52ceef75275837e87655d5750a45d77823f8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMDA71587787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6bed6938abbf49b2eae145a4237921de6f414d3f70e15ed8cfd12e69cfa5e1. 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/QMDA71587795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f754e9aebf317e2830fe6d2f18821e7e23e04bba239bd346050dd309e992de7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMDA71588007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0cc46ad87391871c4d743ade468fc33e36de6d48568233b56a9f123e7534c7. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:07Z), 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/QMDA71588008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af0768b1da8c07601ad8297de4271f87b86a2572588dd1e51286fb967c4f2f2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMDA71588010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae1e7a7d72058539ea97bdac7e16453b7db00a7e807ca5e3e55c275a2b4c115. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QMDA71588011.