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 0x909f4d7312731e7df22d82d3cea603cd6d1b3615706f7405ab080a8bdfa6bfb0. 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/4b476ccc-ba43-4c2e-a39a-f691024f0c85.json and https://artists.proofprofile.net/proofs/artist/4b476ccc-ba43-4c2e-a39a-f691024f0c85.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 0xbf057a66f70b1505b87ee4d41fe465e9aaf7bfd95565f53699d2348ac0984565. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:54:41Z), 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/QM3DF2244675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75af64a6b9cb997e6196a6c0f3b2a06cf04c1615fedc30c3ccedc69f000f32e9. 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/QZVEM2382386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827ad855f33d03c31f8ebdef366703764f187bb75fec0546fec078b73afcda3d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZPEW2438350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67952e0630698e8321813a7c101ef61fa499b28ed95408d6dcfcb5f1d26614d7. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/UKZGC2405059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ae4a1e111ff3691e903af241a4420615470ff00841de56cc3a8bc882954f49. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZPEW2451263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42f42216ec69d3b1cb75fcd32ea157ab8610c68a3a0aff1bab1e8c2474ba749. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZPEW2451264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6c02d221dbeb9edf7b187f44fbfa1c1de7e03aa2a435c01e917426575ad4a1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPEW2451265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a2bc55834a29d410cc09dffa06ffa48a323b5842163957cefb814a2ca71cc3. 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/TLVEM2476980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692138941086034792acc89b4cb077546a757a1db79d26890f3234610fdfcf6d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKZGC2408254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d548152971948f1d2b70ae7641777e1d3e4819add4e52110ed6173dd67f9689. 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/QT2VB2441913.