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 0x3e63f14fa1a167800af54d7ed42db3be80f84e2fca715c1435fb7a78790effde. 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/db7b1ccb-11ae-453a-9094-1fb48136045d.json and https://artists.proofprofile.net/proofs/artist/db7b1ccb-11ae-453a-9094-1fb48136045d.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 0xea3cdcd4ec56aefac842782ca8ab383d06a9742adbd50d0b58643369f104b998. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FR4GL1091043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a95ee9dc5ed37a1b965cf0493670ab1c251a7070c3f62483fadd80d6a9d6633. 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/GBBTF1600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73da94b17b5c87eea18d7ea0aabbcd51c9904a402b13773c4e3f3d6a2c2ba868. 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/GBBTF1700243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253ba285654c70a22f4b95a5528eb2666130bdb3e061056f34d4a6f4b84d9fb4. 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/GBBTF1700249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f96ad3fdeb8354877b004265dec4a0ed303d9f0773c9fd954fd6af4ad953f5f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/GBBTF1700241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73da94b17b5c87eea18d7ea0aabbcd51c9904a402b13773c4e3f3d6a2c2ba868. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBBTF1700243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee47ae496256b45de99b93cb5b3cc745128f3f380122b693a4813bce30227e55. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBBTF1700400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c64700eeb170870638d22006c10b2f935e8d7ee34c4ddc7a5e8cb57f5cb4a3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBBTF1600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92211c8fa8ea474370172894672d87bd620a3ecbcf2f5b9543ebc63f6c343beb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBBTF1800565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de26410152cd7ce36d768c86f9967de7d445ed823b5ad4df008956492423cdd. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/GBBTF1800566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c516f97c2e90ca108c78abdf2565a7dd53495a1428f5e43d7e7817d24776a6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GBBTF1800567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2118d1ddee0fe618e7e9fe5de1460abe24bef063e833aa024942a0d3895b9be9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBBTF1800564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92211c8fa8ea474370172894672d87bd620a3ecbcf2f5b9543ebc63f6c343beb. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/GBBTF1800565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b374dafad9a912e772c8e54649fe734f85a0cb381146f85957eaa4e06eeef85. 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/GBBTF2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56951f32a55c77d19104545d5a9490af999e97afd2c0918caeeb2cd7d6449769. 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/GBBTF2500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727e9fef37a40faed42098ab9dd5bb96d7985b7baa366ec5c2c4710bcbc8b65f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAN112100971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727e9fef37a40faed42098ab9dd5bb96d7985b7baa366ec5c2c4710bcbc8b65f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CAN112100971.