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 0x21919b115b45abf37e40f28d0d4b28f84f1779a228b0c961dd8c577a8359aafb. 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/fd3f3772-90bf-4d32-a3dd-7fd95212499a.json and https://artists.proofprofile.net/proofs/artist/fd3f3772-90bf-4d32-a3dd-7fd95212499a.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 0xc4fceada74aa339503fe42df1d1062adbff87ae30c9a61b0a6acb9820fa5046f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHY2467026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b10b8aadb0916a847ea15ee6d1cf17e55856dc86c383a9028e3c99c0ffaef1f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAHY2467042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed39980a12f99e1e79279fc34ef3c7352388ec8156982bd7605bf91a487a0e3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAHY2467054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12afd16d06192e00c48ef941b9a7cabd52a884644b63084fa79f29a339ac4325. 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/TCAHY2467068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7255d683e1c781066d4f7a9e8f6b6f6d42c449b9438d10726be6e462de0e3ed. 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/TCAJE2515726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f57a68c2d89b4223eeb1dd48692a0e51fe41243a5019ff6aeb9ac033662168. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAJJ2571436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ccabcff1f97bd105a381c46dd264420a2743a50a5721bd8abe2a09c0575ff6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT65W2577171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e568c44aaca2c6c3a4f9fefbfef0d52a535a4b2ca663fd7d2943147f23fd54a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:16:32Z), 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/QT65Y2525742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c9e8161330b80065c916a89dff16185ba174fe6a56676abec4254ac70543df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BK4DA2424705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc867347f975cf43c0fe6759f14907ac38771ade77feeae656cce5b9094efac1f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2439346.