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 0x7855acee477a5b8fab56d1353a79d7f9c509df2da79088d106742bb9c6932df4. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8a5bc4c-8529-4e44-808e-60b70faea5db.json and https://artists.proofprofile.net/proofs/artist/b8a5bc4c-8529-4e44-808e-60b70faea5db.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 0xee36fa5039def1f19a1fc7bcbea7e895cb7cbf532ec89806f9f5d669aa05f23a. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:49:50Z), 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/QZZ7L2457312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ccaa4b028c6fb11517f54abba717fff6108213fd4db4c2ec5d42431a464eb2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLA812580042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2982505711f203180a3ae574d451cd5130b27f3caee3045654239016191c88fe. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTB52405496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d16951ec46d55d823b4819b4320dc7e29e9699c20fe53591351baaef639f1c8. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:49:34Z), 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/QZFYY2263122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37010d027ccca4b309ce28b65a3c93ef2a3004b82409c835f980c7dfac564c1d. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:46:59Z), 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/PLA812580043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e5a9a3f3960406102e84135e27d3b5d6dca9f5fed6aa180f0e219894d2059b. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:07:55Z), 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/PLA812580044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c7a12e607372347839c068a991165eefd01e005aa27939a19167a2dcf4c60c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:43:57Z), 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/PLA812580045.