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 0xd5822d9365cebffd06a34e01261c33706f223d994cd56c616c26ea28437525e8. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b8ebbda-e315-4bf5-b3d5-81b97116d61f.json and https://artists.proofprofile.net/proofs/artist/5b8ebbda-e315-4bf5-b3d5-81b97116d61f.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 0x74b1c5ac4dc7c5da5f4de4bbf1d64a2b013d941b4612a0f73ea702de1d80d222. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:58:32Z), 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/QZK6L2005484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb898938f18a5e1b6e2d9740e39fc8c5a233c22f5474005708dfc0bf7b1027be3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6F2048094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7eeaff7dc040c5b9ab8e00cb61d5973aafe10e361df8658abfc603e008ad601. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:50:20Z), 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/QZK6L2005481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecefd59af4995687f3a95ca511ccf172021159e8765371d891667c400221e263. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6L2005480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9732e40fc14cc0e804061c571a0e5baa0f97656e42a6b48fa12a2034a3b1564e. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZFYZ2110029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3068359697a3516d4321e91f8769440a7c6f5916bf4d3b6152aff1cb2cd91cd. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZFZ32110521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca1db81b11d038f63e90abf939a60081dae467cad8340fc971c8a2c4e564690. 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/QZHNA2182897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d77b08c667d836d841d88828d935f7a3bc057d613525dbe3ffb5d9f3815efc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFR2156362.