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 0x29b2b3caa8bad0f40b18235d5a9e18930e6c2d6c0f063c0399007af9a8660cb1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/649beb05-d5a1-4fdd-8261-bf3bd19dfb77.json and https://artists.proofprofile.net/proofs/artist/649beb05-d5a1-4fdd-8261-bf3bd19dfb77.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 0xbc9db0927ed69f9e7d5faaf834e66cffabde1439a0be63e2b5450730f048b480. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BK1E32400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4d950fd22492562634f8d15dd3c19bbacb6365feaf8bfd904b7dd0b61c9daa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJX2430573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcc3d4f4a52d986ee60c11adc202b5fb8d618a7eb2f5625eb5cef021b453bf2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJV2427085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2280d26ab37ba5a51aa632ae1ff99d7fd62802755b2bac5894e955523808ef25. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLZJ2523127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6907f036ddf5e679ac6d8ca84e082babd769fc59fdc3bca08d7391da6bd5a1b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLZJ2523180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31bf7dda22d1519f844e1fe90cf795292c9b2601dc9ea6c0e92e118c86cd105. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLZJ2523308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f3fb426e621778f2378b8c5ad54b966fe934ae88be2589bab92a19a97bdb15. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLZJ2523328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218251a5f0d667ecfad86534b3da0cafe23881edceaf37ce4f5dc2ab8a8e5121. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USLZJ2527422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58205d20022a7c113f6c6d54c80b65f9c80285c78b9357f50061c38010a458ea. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USLZJ2527698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5106f0d6a4bccdc07afd395e828463353db40ed0ce2139c7e4cdb36b59381e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXIV82468010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b9b9c5c5252f725d14ebca06406cf9f3fcc6d5c0292192f56a1cede5acca47. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2404572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3940e32cbbac8a8b4c1e4859430c72a483a64ec9e7fc7636e8eb1639d33de9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2404573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd240b15a80437d740209730fc56b86aeab03f6b2e673f567f5c980f350f35fbc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZGLS2404574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ecd0ad5b39fcd15d1897e8688add3d31f8e085dbaa2a0120ce1c533c8975de. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2404575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5c72ba8d01b43080cc8bd342f34ee95267faad811cd5520a7a7e2b883ac2f0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDD2504225.