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 0x1b00a9b9970f7af8c42c462e6619b539ce2d746d0106d6fa1cd682ca02419121. 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/13e1310a-9268-4cec-8644-4308d9bfeebd.json and https://artists.proofprofile.net/proofs/artist/13e1310a-9268-4cec-8644-4308d9bfeebd.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 0x2be0812d665c3e84da53c82ab56f0f086610f41b6d70c570783cacc90553a38a. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZHNA1998943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bee3e1dadf5ffe3cc5fb6adc7f8596fb0e3ce34072149c7fa1f8d3ef7f0c073. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZK6J2506151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc84aba0f5ab51e555653f63bb46ea5272906feb0f03c02bd46d1998c50b3af2. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZES72547422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16462f62aac9e447da555ef239cc50d4b71c3f8b7d314c9e1215f8fd5546dcfe. 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/QZFYW1912562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77215c23f222625a1fade49a992fbd1e8865394b4461123d43311ddbfff75cda. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:27Z), 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/QZK6N2056829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbac36fa301e9fb9a201d69bab223dcd371e31d090a4106d21cc0e12f65edaa6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:09:10Z), 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/QZJRB1984760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8570bfcc50330064621cac131c83d81a388b1c27e9367d3682d18cc3c198894. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHN52017895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766f13469360bebeb728a57210203bf8aee872322b71159dce0668efd65249d9. 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/QZFYZ2038352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9dc7e21a9403962d6af51e2a3cc99f7299e3c184c759fdc32f5d5b99e35d5c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN62160649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2643f5e3de814f6ecce9b7b508c97c738fb7f01eacc45a1f8d47be708293e7. 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/QZFYW1920667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d22ebc3d319224ba4a69ad6a3a01ca5450ba7630c29f405b958305762e80ea. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:50Z), 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/QZMEM2254759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17095c25b10122acb70c12a02ee390ba52860e7466febb6af9b834445656a437. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:06:49Z), 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/QZTBF2344092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84c17db9751a5305c7fa06d6071e0f32d0ed130d8c8654afc67b9e3264e33f3. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZDA42017369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa594050a95f1c2036e9d5d873a83ab04c41e11f3b26e8b531ec999417e834e59. 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/QZTBC2365048.