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 0xa94d1c1e958b660ae2a4b324cc3381f7679a0b7388ba5dd5b717228aa08f7a27. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0909f689-901f-4426-83a3-74df2223565c.json and https://artists.proofprofile.net/proofs/artist/0909f689-901f-4426-83a3-74df2223565c.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 0x732cb40a2646d5e5b2975b863e919a617fdec404331a3f7da64c57850cfc18cb. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:02:31Z), 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/QZMZ92520500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8fc98a016c94fad9a82e774fec89dc1bb0c458f223efec560797cdf34867de. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:45Z), 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/QZNJV2521486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dac3c0e7221601fa3f3bffaaa1ac730a5dc269c0bbcddee6053ec795c1398ff. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJW2538850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bccd7cd4487fd6cd5856b3ddf975599fd0811a34d15348e0f0bbf76c0ce977. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJW2538851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60477e053feef049e84c93d4b3c35d4bed8a4a85823c406745f9b017a60db6d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNJW2538853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f79ce60cb2b98a5c485537cb38099ffc5834cb305e5d0a56bb582976544869a. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZNJW2538855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fac04822c4498b2df2facbf2d6bcf2b5825cc0be07cdd695cd27353dfc3dae. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJW2538858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78a3cbd1f1b1d5a6ffbc7454d9f424cabcdd75782a845876615fa2995604433. 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/QZNJY2525892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd1038696600c1eb0bc730189fda849dce3caed539611fca46176cdbc9f1d6c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTPX2533565.