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 0xb77d2a8eed919f63b0adcf9ea9a0ac5aae25c16628e2410ef86acc0c2a5208ac. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08b26c03-b9af-47fa-8954-b4c744db92f8.json and https://artists.proofprofile.net/proofs/artist/08b26c03-b9af-47fa-8954-b4c744db92f8.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 0x11796b10c94a3e54bb063c2164262f16f16b9651f5484077beb7c659142d058f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-19T23:55:51Z), 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/CAENV2543772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7a45164c32fff0610d91094a96ada4d0f2a29b2953343e331da16b3ebe23bf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAENV2544334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8892f5b7e91519e4cfe0ed28ceb3712ffe0316b1b2bc5cc15b99502ec481c1e. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/CAGOO2528725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c49c28372441650ccb711bcf77f127756a4e029b1b33754af8eb8850641fec9. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:56:52Z), 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/CAGOO2541179.
Just a moment (Piano demo, One Take Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1f8942136835d254401a6723556af76ba72fafa30902614e7d99efac0daf42. 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/CAGOO2573334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3ca91532fc2e1fc1afe25055b53ecd5cf14a9539e7610d20779005daa1fe8d. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:38:30Z), 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/CALVP2517421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ef17a89b5e7419147e4d1310e2870e09e980de5cfb1a3792b9179bd95acdda. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CALVP2535376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8748fdec59c138dae248e5116e6ae62c3f023b3cf9f9ea0426a2964dce66e9. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:10:15Z), 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/CALVP2561764.