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 0x3c8cc819552d0a5790d96351ccdee169d4a59a1868bfef904a4c31184addca02. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa7c07e9-7515-47ef-8f69-9b70d3176367.json and https://artists.proofprofile.net/proofs/artist/aa7c07e9-7515-47ef-8f69-9b70d3176367.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 0x25bb4aa19a9a5d05228ea97481f9b143a981ef76f907e3cb21777c8685659fcc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SEYOK2024261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd00e8b8e60c55308fb7eb5306f90c4bbb434c6a683612e17c5518dc0285392. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/SEYOK2024262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750a21ca42dd60e7e86b1bcdd4229565ffdf2c3c5231021c3081afc33cb49fce. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/SEYOK2024263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb34f0653f862108e7da3d6808ea0ffd76bc4ee303b16f27abdfad1e5b4aaf1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:12:53Z), 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/SEYOK2024264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d22d6cc306beeb32e1c1aa6d42c45a857fa7c2a2c5228ac8c8e3b034ba8dfa. 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/SEYOK2024266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaf725b581e4c8fd96a18e47786319cc2e9fc4464cd3861e717d659cae1f922. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:01:35Z), 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/SEYOK2024269.