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 0x47f9cf9af0ce4d58d60e0bee36cf22a0630c64442ca1c1493f65836c43e11d74. 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/5bd59ba1-10db-4f7e-81cb-bf152f00e5b7.json and https://artists.proofprofile.net/proofs/artist/5bd59ba1-10db-4f7e-81cb-bf152f00e5b7.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 0xd2d6196ed1feca2a56b9a754b71f0a6054f5fc8e65360b502d19489e8d045649. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/SE6QE2498982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0a50b11a1728a3c3d8bfde518fe3845eb9486a82a5e1e404c6f0ecd29ab9a4. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:08:50Z), 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/SE6QE2498983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee177c7ce32c18502add3565357b7c53527bcc3b36c008290afe7a26049ed44. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/SE6QE2498984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9560d3df60335b16468a04b00ea958c3689a138d80aa1382d9cf6af5f73c934. 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/SE6QE2498986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6413f14756a4c64b4b8fb5e75545e28163336e6210f14e629b5558400d52e2a2. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/SE6QE2498987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc13cab62404a50081d3a8ae90fed10c1f779a8d05ebc3d304ebcb4a00d70325. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE6QE2498988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c465163ec1e897513abf98311e924fc2ab874d77884564b4bf31b5224e42c8a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE6QE2498989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04810b03c5f78a682a225c281f5e127352eb4584f7175da79ab4790635133ead. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:54:12Z), 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/SE6QE2498990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d12d7db757ce5ea345dc1f93e4d7da274d179af7c798979b2cff9fb2a1e594. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:46:50Z), 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/SE6QE2498991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeed85a8ba487e48951575d9d2f70ede18913fe39bb4640e889927fb795bdde1. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/SE6QE2498992.