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 0xf42e01b3cc1d32ad12ec6c1339b038c6dc056ac8a472e94bdf186c931068f583. 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/519b9d7c-e16b-45ad-b7a4-d2929040681a.json and https://artists.proofprofile.net/proofs/artist/519b9d7c-e16b-45ad-b7a4-d2929040681a.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 0xda0b88aef211a8b0292a362f58285c0d07dba918df34e1658974f15cd5c014c7. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:05:46Z), 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/FRX201853544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557096ca835bca2038ab9920eb964ae77f1ec15d3d0adad61a8e4aba48c2fccf. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DGA052012363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46e300b7235ac0fbb41574b87397263a8b999ae8777d345c58c1c541658310e. 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/FR96X2189481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232413cc53fdada4600583890dd1d9c6983881a555e9ac47daf096e2667c281a. 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/FRX282247744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab501ce6cd880bc5d220fd86b37e92673e493f93822671a26218ea814dd94f14. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR2X42414373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2888b3bd9cd31e08ac4b83fa7338d4c46b547d6cfdaee946dade7874fefd264. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DGA062468546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2000bf94d8f836c6eded074f184764538f797c5596e2dcbd6f648fdff8cb24. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:44:43Z), 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/DGA0R2474420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5d9e3997be8d28869e8e629e5b627a928a967cd838d77915a58ade082a213d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRX282544521.