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 0xfc2e4e2f7be0b7fdedc20124927f89cb726b00a6191b4e9c1adf4edc477bc08b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8109c9c2-98eb-41cd-ba6c-bd12b61cfdd8.json and https://artists.proofprofile.net/proofs/artist/8109c9c2-98eb-41cd-ba6c-bd12b61cfdd8.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 0x86db520db55bf1cb2c162e02f0250164753a78f067586fa2c1af691d6c0d4c1e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:48:34Z), 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/GX3HH2259697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01ccbd632454dde17fe0204cb106b3c6185855fc3aebf761f2ec1b8fc1c2458. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX3HH2433418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d53a57bbeb6fa63de2304a7c9af66f8f0dc01bfcdac31b6c3d13c33fd661d3. 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/GX8LE2362279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2178d3abdb65234b30842375cc929c3124944e5cddfa4139e144b11fc79fff51. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:21:17Z), 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/GX5MX2486548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ee8b20bd8382590844d882d10c20ad4845d14c34a38c917fe5f6014c707c5f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:20:27Z), 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/GX4R52404941.