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 0x6ca509858502f1bbf71e42f57ddddb64ca82ae5a7a157dacc377cdb99ad7064e. 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/b6f0e43c-d774-42a9-b93d-9e8913857754.json and https://artists.proofprofile.net/proofs/artist/b6f0e43c-d774-42a9-b93d-9e8913857754.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 0x39cd7f8c62e803321abfd0447d7d4c5a84a4f3545596a4242d101108e8df83f0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZW9K2395145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637f9d66229f764bb880ee6ee68db898dd81b79f4ea2002c76940cf86f702931. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZW9L2326141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ad42e96faef160635bc932d72d45eab44612c77f6c11548715d31287400dc5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZW9M2373163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f874e9aec6d90bdf70ed33becf9328cfc6d8f9c03b0ac12e88bbabba002d243. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:25Z), 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/QZW9M2373390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73eec2442b923b208692868754e59ce893ec67ba406dbad3bbc3aa72b6ceac41. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US7VG2432047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd3b53c78127dd4acba9dc6902e36e4e519f5501b435c755241739c692b9376. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNJX2476268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a5f959b23ca12b9eed06fcaeb3a3edf7ae265a1314c3e31decb2e95b3172c0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:37:37Z), 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/QZNJX2476410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a9250b213a6d3696bd0a326c944046c15003a09cbcaf6440a574f55c9d0a30. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZNJX2475370.