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 0x6db2a426f441c21857ac429c60f83aae35422d4308d5baf585ab3f8b8eb82f37. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df926e05-5796-49a3-8956-9185e862abc2.json and https://artists.proofprofile.net/proofs/artist/df926e05-5796-49a3-8956-9185e862abc2.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 0x6275ceb36b2071cbaaa307b28297740eb262e3fd7b3f029a6bda16af0ae7625b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR9W12425785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48274a130b8469ebe29334ff6fc392308fba3808eabccdd7267cda05312d0008. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:54:46Z), 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/FR9W12450244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad271af477555bc1386edaa06b0962c703691a2186877da8fe9293fcf005a70. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR9W12458822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da53b86f174e01f92238766dfc0217b9f91c5ada9ef970d53285e052abde2b5. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:17:46Z), 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/FR9W12503538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d701373eea19bc66dfd6398b9396cceeebf9f89281e3e26a8456ac0e93a552d. 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/FR9W12510945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82319d54369e5b502ed51111851f99ec39f1f893afe33d0636b8d812cb035d6b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR9W12520846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8734e61403e9d7a0761e6673dc5def4879868895a8c3a42f327c49683627fc. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:19:09Z), 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/FR9W12520676.