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 0x9e6dc7fbc1a243c55254b699df67331fb1c1cb340e94cd4e37817a48f158f95f. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ef20ace-f6eb-4b96-b827-b046b02dd362.json and https://artists.proofprofile.net/proofs/artist/5ef20ace-f6eb-4b96-b827-b046b02dd362.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 0x02b11759341292cc159a21f6e7f545e901db4661b44a26eb38d3dd826a1abfa1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BRHA41400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8930d3e251ff8d5ecfb9c6e83fad0982c8c26841539729215ede1f763e4f64. 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/BRHA41400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18d371b6f38419d10c82bc6abcb40c6201db7031e985d4897924f60445c5e42. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BRHA41400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078e7fb98db70abf4d14902fa84c7a89c5f71d5d2ea4a37f11085e401ef2e5ef. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/BRHA41400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52327bc04303bb5f7e711b9e61ed1de6f82f66469e6a179494b5f172c943543b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/BRHA41400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8394467988f9604716a76c633bb59868c0e6160fd2dcc851eb4dea190fd122e9. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BRHA41400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda512cb834990e3a9e6142f0861630873f91d4d59983ed6c307a7b3c2bc118b9. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BRHA41400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8496444074a0b01cb08a2ce48935acf871244e23b35b8480e67ea038f9504f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BRHA41400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e7c2f22c732e6a138df21177d91043f84966f06ed611b8c53c2e4e7257ced4. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/BRHA41400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa778988cb299b67f667d798b0c2834607b2245a2b3149e7c5136c551186aa4ae. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/BRHA41400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531f68e46484ece34fb0522efda39e315f483896ce5734b171dcc986b3accf56. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BRHA41400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa221899d271ebb0599d8f1a27109cb92187f4737bb7a1eb3ef08a940edaa01cd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRHA41400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a0100d63d183f0031fcc47f44504b5d1c4780ce02f9d26abe2bc6e5ee3b5f8. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BRHA41400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b70864163cef9ed7746ca8db2c1dab20b8e136052e635e736c2d4469f2794b4. 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/BRHA41400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ade818a1e3e0329d8e5eee4561bf28aa0450c61071e27e462a364ae88347de4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BRHA41400088.