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 0x32d04ce54b39b4c63cbfd3acf69ac5305b755cff1d7535cc1e13c06864164258. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91617b01-eb3c-4219-9920-2e179e51a5c4.json and https://artists.proofprofile.net/proofs/artist/91617b01-eb3c-4219-9920-2e179e51a5c4.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 0x10bc01b06bbcd632d5d11de24b28975337f1cf1be7ac02ada5ef8c937613a191. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7812192225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b4688ba0fcf8f515c8f524e6208271aea6c311bc6c6a95b855bf2897f0b492. 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/QM6N22118514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dec8f29c116d2a795e6c997c0d41afa6e01c60cfefe8b9dac1f0efde20c842. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:45:43Z), 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/NL2QC2100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d816662cc1eaabe2744c891a196268181348a4f2ee07ff05f1a7aec0ffa638. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:51:37Z), 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/BE8LH2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03de7122393d2488e195475a123f2b8ce0a9dd093bddfd4f25e2cd77b8dfe119. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:32:48Z), 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/BE8LH2200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d717a0715ffc3d7b38752d0b4b86b2a652aeb25575c966d54d7216c15295df. 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/BE8LH2200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b88273fac4bb4ddfae50d9214d5f64f078e980158ff2987e4c24094781b75e9. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:55:25Z), 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/DEMA61905541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906378187863fe05f0150a147ac62cd8d3b62d3d2169acd381b135cf39c81dfd. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:08:03Z), 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/NLT2H2200730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd426277745696db6a2e67f236177c0a361e4936ba5865041c3de4bcedf3afb0. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/NLT2H2201065.