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 0x0fe7d83018588ed9450e1051a4525c59f039825340ef27ffb918145210d899a1. 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/e1a3e041-c12d-4dcb-8382-2e747a31b5bd.json and https://artists.proofprofile.net/proofs/artist/e1a3e041-c12d-4dcb-8382-2e747a31b5bd.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 0xb901e1720a48e1cf8dd9acefd97f775263b1b4f0e4ab50e1891d484f04a2d19e. 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/TCACK1528767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa54c9213e66e726feb2f0ed85ef44814ef33db88faf62302d903a5f23fb3055. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCACK1528768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364fe249b661ddc8ed69e0b7392d93374b121183dd707fdd94e095fb989c055f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:33:08Z), 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/TCACK1528848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc995d202db35e4e5bab999f72e07793ab842038c2efb2eb5e4800df50b06a5f. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZS1Z1627537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4d2dfb49ad4853a6b6710df679fb008a867ad39e0cb9564d4beafca802e9bf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZS1Z1627546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34698a3abd2f59494fccd1e5d7d64918d2b48607d3a6e7550bf3f648387e038f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZS1Z1627548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ff20801fb083a22bd8f12f6f658c459159f0f423f0b52300100ba3eaed590d. 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/USLZJ1849247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0ef0cdcd0a019061b6fd1dfcfb00b5105f201543e1d87e99e31c83d118e364. 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/USLZJ1849277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c92ce033b1c78ad1effbffad3a7d32ce8e26d6b7598a5a22a98f1dd90f8cba. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:37:35Z), 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/QZ5FN2071156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dde157c3f31fd2a95a5f44d652f1b78f1c88e33cb2e39ea2420766b35d3280a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGWX2032807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d6fd5cb3b01f2d6a2c94cf8f60f9d8bd6a48f7318a831d3ebdac535df26ee3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ5FN1950293.