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 0x445633fce1fe2e6f9a5b24fab94eccf811820b290767a0f9df801d9c21d45233. 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/aed77065-5508-49ba-9917-841b0c179584.json and https://artists.proofprofile.net/proofs/artist/aed77065-5508-49ba-9917-841b0c179584.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 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 0x55a1612d555c00da84c7cad91e2150ff8377c89a2802c33c751fb4fb946073a8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ72192621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d3d9ba9d439b952d9bc2c8c4056560f910136c46a6262b46a3ee55cedaebcb. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZMEM2304328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1a79c2b0a02b0f1dc2c7a697f0f6fc1ca53ce3c74c88e621c9621eb4e03673. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMEQ2346046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f18407c1bda5d6039dc20a0cbb7752cc146de5bb9d4adc6ab2d1bc133671288. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZPLR2428990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3610f57a3f815e3e1c1b167f4637563ae7bca67ce350820f49580e781adc1c91. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZPLR2428992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0d82bfe167be569750195f26cea64d77fa887db3efffadd4a50c09b374b6b1. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZPLR2428993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39b03bfb4767f2e68cc8e8c6cf558dc616fdf32b4c6cfab78abc7a2879b65e3. 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/QZPLR2428994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f7ab263a8cc7eb7e2b17af541065e82998574f23834e19f2ad7a677abf4271. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZPLR2428995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c39328b18621127004e91aea131775c8acc41c9d25b46fdf68a7c053007f242. 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/QZPLR2428996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c669095e5ff646a36876ea5a993d7616269245f24a437b69c72b1fe72c18a0e. 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/QZPLR2428997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7682229c1f6b2c917e0ffc52095f8bc4d7426b8759c6728c85a094f76d64a416. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZPLR2428998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bcfb628a7a78f240328a4315590835bdaf2d94ca3f14e6d9aa7f28c069780c. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZPLR2428999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654e01012a69b86373d7732a02edfb9f807a03d97d429659197753374dae4c4f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZPLR2429000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaea5c3cc9d1f9514ea5408a74e363820a8b6e61058aed286ddbd0b1a911e36. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZPLR2429001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0076f0f681caae2d56cde6de6adbc322186efda8d639bda757eae84185bb823b. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZPEW2515913.