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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f159cec9e570569b06631a27d11accb0e246f5763ea36f70ddbd35b12aa787. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c077df7-f945-43d3-bbbc-59b48362b310.json and https://artists.proofprofile.net/proofs/artist/8c077df7-f945-43d3-bbbc-59b48362b310.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Music for Easy Going Days - Bossa Guitar Trio with Jazz Organ
Jazz Organ and Bossa Guitar Trio - Music for Keen Spirits
パウズ・アンド・チル・イン・サマー
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c3569cea566dfbde93906c91de212cb008f8f3716cfcf67c5176abbc34059b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZL9X5868941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56823831c129bae2a7ccbcf839af6c6c151e1254aa0a495e204f19330f79bc0c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZL9X5868946.
Relaxed Son Montuno Trumpet - Vibe for Golden Cafes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbe600b5b180ba77fefdc448dd38fbc63cb68bdc73c3851ffeef5d18e55ff17. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZL9X5868947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18df52442c2cd7bd1910458f7d5f1606fc626d49715bdc7a847f89c1950ff3c3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZL9X5868950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca6916dc12019cae595772168a347ff981a6895fb5bf0c9ba47da9813cd608b. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZL9X5868951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ce93bdd38892c6ea0e4a70541fe51c48110e249e445c694af39ff662b3a76e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZL9X5868952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90915e8063cc528fadc59f44f17dba2cab5876a4d760c8cb8b6bc7d6fedfec0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZL9X5868958.