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 0xc48008e611b8e64d52d870e58ce6a39a28863f5be966424a56153040d60e5e5c. 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/4f2b22c5-2887-4700-9d57-40350842d851.json and https://artists.proofprofile.net/proofs/artist/4f2b22c5-2887-4700-9d57-40350842d851.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 0x977e28769d1c6bef28f87b22a7c60cac25706cc27e18024ea7064faac9291217. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTBC2357408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089b4900e7a60b97429617e663112ec5154202e0d5efdc55d6ebdf74e70f6b03. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:36:48Z), 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/QZTBC2357407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7fa6f20c3cb1accacd339538a48c0df236b8664ffa6ef43748bd95c9202cda. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTBC2357409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1c0b22e8a32e0757cec4e01b3363aa65037b4182b355f960425a7c65ce222d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTBC2357411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe766dd8496b894e335a60fe11d1ce29dd7d91ee289f83bb43c385d501b85261b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBC2357405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d6212dc4479e19cdc89ad8ff9cf9d18213ecfc02e36bb8e34ff2ce12bd821c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBC2357412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd952e7ef45c643786a56e5accaabcc3f4debc1b0b2fc88fb734b2144f27d42. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:36:48Z), 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/QZWFG2331209.