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 0x5ca9c88ce051face97ba20446d0f359f25820f1173630a6c3c14700cc6ee1034. 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/4f4ef61c-1f3b-4fa1-b6ff-d53c55ce4de3.json and https://artists.proofprofile.net/proofs/artist/4f4ef61c-1f3b-4fa1-b6ff-d53c55ce4de3.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 0x3b54b51410756c32e405d1df1038993e9053589cdc9a0b8b36ea9ee12d137c3e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN92338224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337ce3b96e0afceb72e3d4f6f159be4b639f38ae2039f1fb9d7d4c35f6d90f4a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZHN92338218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ac799394e22c80dba01b0d6b92a5fc0c25ab0860f0160a2763bc2b5febdd56. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHN92338219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd9f2f0a8748426735da22a0a2fc017cccd0edb7ef66e62161988ababa2bdd1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:31:04Z), 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/QZHN92338220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39ed923fa4d3a92522dc9feb405208bf49b4d471a6820955562cff90fd48b0f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN92338221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b7f15fb65fe45c0639439ab7ae8b406812aba198963954d1be35f08ffb12aa. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN92338222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7abdb111c7681e5c94c542dbafd4ecc709d142ef2dc8c47608d13ecd97a909c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN92338223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c86439652a125339cadcd2f3d5e9d16648671cdd0c8266510287b13e4108b4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN92338225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0347647ae401596777af4baca340f7284b6ada660366b30d700f098635036a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN92338226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d1455fa8f50c1d23b0deba257772979f0364b8a4dfa3e3fcc8f8c9d399c677. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN92338227.