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 0x6e94a961b3f4e3d789745bdc3f7773aaa710ef8acb52f3f6daee949f8e62aba8. 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/1a078c58-e950-493f-bc59-25fac89fbc9f.json and https://artists.proofprofile.net/proofs/artist/1a078c58-e950-493f-bc59-25fac89fbc9f.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 0x06a116672e4b41580404eb63f9ec3c714a612a2c97d31e1a8ef5307269cde42f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZHN52566691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a1c57cad34c3c2387d23f4714f6e9c838a899b4182a67aa5af633b0efb1f51. 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/QZHN52566692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314dab1a81ecb3717c55210f52769a7760c8b0ec42636d7c5a0c734d617776c7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN52566693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6aff94db1071001b07271ef76c1382ada9d8e11c8168d82027c8e1e0ce4ccb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN52566694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab093d5b0bc054f2a990ef9b829bd6b0c75156deab6d0714952ae2e4fab1e0a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHN52566695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7c3ac64ac55f15fdcdebf280ca2d19329125e72f6bd8d1d2f383b920ea318f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:04:24Z), 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/QZHNC2584443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f15e7734abadf8f6a59abfdbfe68c275242ab28b1a6c8b9ad71eb3adbb79660. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6Q2553787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9a0fa8be9690d4f61d3bdcc938f296ec0ee79bd2d294a03857c69725c81993. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6Q2553789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e8277bfc030ef224aad2013f77cafb2738d7318c6e5c0d75d8ecd1dd9000d5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZMEP2578462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef7d2c136844e24cc4f3fc08ffedbeacd6d3ef0a0349c919e0c89d1b40e774e. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:51:39Z), 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/QZMEP2578464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f94ff5d2b417a5b68624714112d1799036659d81d48b774c87f194c5caae2d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWT2590361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd098ffef7635d0db32678db05100bf4c96f8cdecbc1c1d43a3a841300cbf5c09. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWT2590362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3af40e5975381815f2342f7190699e623c60b5ed94559c5fc8bb99ca5fd83a8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWV2564015.