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 0x963987e62753e7acf49d68475b76eb9b9a981fdd8073cbeaa3d8af6076280227. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be5bb675-ea6e-4484-97b7-f9ddf93820f4.json and https://artists.proofprofile.net/proofs/artist/be5bb675-ea6e-4484-97b7-f9ddf93820f4.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 0x8dbc0110a9f523e5c9dded49d21cef5b242ba9592ceee4441a02d7050991a7f0. 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/QZWFJ2307192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0892dd438476f369b65a241fc4de5a619dbae13cef23159de4c3668322949495. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZWFJ2307193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58668743148d87febd8bf7d60793c922491394cb699cb0a953816995069306e6. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZTB82345387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655c9639be94130c66b8e501ba75883f5a2577c313db32ae6bcc75af67b1143f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:39:37Z), 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/QZWFJ2307194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf94f1b4b7823b6e6a9420caf7552e79f29dcba97e4875a786936b9174c29bf. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZWFJ2307196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb46dd5ca33c5a60f3a92723387faec715f8b430f3ff42a01c2d8865b58ba6c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZWFJ2307197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef0734e41453864d5df87f506173ec8d30dcdad4cf61f22d66089392de771b2. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN72444656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655c9639be94130c66b8e501ba75883f5a2577c313db32ae6bcc75af67b1143f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-22T00:00:57Z), 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/QZWFJ2307194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21afb7281f5b3913354ef117884bd8402f0759f068dce6e58eaae7a68af3e5d4. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZHN52551250.