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 0x7a5aecd4a3e1800f8362b1c5f9d40d250f75a8e92e0f39cdc259251bb9035312. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42c8e9e1-27e7-4969-a9fb-a4475e75eddf.json and https://artists.proofprofile.net/proofs/artist/42c8e9e1-27e7-4969-a9fb-a4475e75eddf.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 0x303fc143643cb60bf0f393b332cb231fb7cc8091bafa65831a4a9c09adcf65e8. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/QZSYP2157163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a836b13cf621b716694f26775b0b578995fed501f38b784ce4cc802392bcf1. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:15:39Z), 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/QZQAY2499901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa556968bedb6e8d230c7dd489d3fe0a7beeedf821b0cff30573794b2a3bab2fa. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DGA0H2493316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7134627e0e0ed9c507cbbcc8bfbf9096ef9a216bfbb36d26ee5f463ae3d116a4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZS7J2404020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e3460545f9fa85c6444d76cc476de87113efd3901828a94bbdd542ecf24e09. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:25Z), 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/QZS7J2471433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d74380015d0dc609fa013adf1e0b482558dd4f99eb671cd3855825ad1d3b77. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZS7J2401517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4545d0dce2504eadb74de0d20c0363acdac56d2bc8e7994897f031ef3812bc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZS7J2425853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1266f14b93a60bd065261054fdba3074c0d1062358a5af8d05a02ed04304177. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZS7J2456582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9330802839d5801309b19701ed18faa707b98c38f824dcbbe687065655f321f2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZS7J2521005.