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 0xd13763c31c38a1375f5fc2c101169868fdedc9d4128c4affdf89ef5bda36e19d. 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/9aa583fb-315a-40d2-9cd6-fe084ab7d9ca.json and https://artists.proofprofile.net/proofs/artist/9aa583fb-315a-40d2-9cd6-fe084ab7d9ca.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 0x07db5da00c46ab8c4451c9e88b5711e116c354db880e301a8607cb0eaa77fcee. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNFJ2404655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a81c4dfe058618de1b22c7202f21b981e02ae6adbaad6909bec88a18a8c9217. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZNFJ2404659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51077e202d5d0539d7748af712b6c536f2907b6b584764c261971e20afb8d95. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDQH2442965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1be58914aee184ee6b5f50c93054adbef985bff8bf7823419c0296f07614da. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:29Z), 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/QZDQH2442967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ae3bb70403d06a254f25f0670bde31c9b69f45da9813663e1799caa7658a17. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZDQH2442969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a86c831586ff24788e0a11ab9be3fe141fa380e10f585ad93ea9861ecdaf738. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/QZDQH2442970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a3570ab9cd0d31cb4f45281551c59f7ac99e835775f90eda78926a9a522b94. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:37:20Z), 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/QZDQH2442971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e1edbad4b9a3feec81d130cc0770d605e502a7a477f26833347f56fc9ccbe5. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/QZDQH2442972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2f69f1a413629c61c4ae153bfd5dc0d669c0412a784e0b1826259c36052371. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:00:16Z), 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/QZDQH2442973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf632f487479bd89ebbb594a0617e6c96e55b90a72be98c0baf5eb6fef35348. 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/QZDQH2442974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc8477899a914f79345eb0e64d7e8ea24826103a92a2c139eeee923522cfd34. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNFJ2502837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abd8f50a428f1a706f9a2f26191c098b8c6937d686e4f6ef442dbf94c389eca. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZDQH2529610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec89c5d9c928e1be317ebf3a827c868e86f648d3674c7bd85875f65b5c50fbe. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:31:49Z), 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/QZDQH2535265.