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 0xbc16e3675f38a82a214ba16bb6f9e22c127d6695d9260cffd2b4dedacde3519a. 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/e5596462-7999-4553-bdb9-36abcd2e0969.json and https://artists.proofprofile.net/proofs/artist/e5596462-7999-4553-bdb9-36abcd2e0969.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 0x854617629104d92282a683f78625c4f815e57a7bc8c673fbcdaa27ef71be2cf2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMPKX1879097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1ce010c27a2b06bf18c2c08ba5e7932d3d3f1f77467d8d354e838d50dd6f60. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZHN61930397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9451360a9fecf96253181bed6ffb8a6d41d4e8cfe7ea3d57465fceeb2e7e75. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZFZ62047234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf2abc41fcb8fbd822404af50a7dd128610c27a0261ecce9261bcfdfb9a7aa2. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZFZ62047235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2928ac8d6bd03636e980a45fdfc2ef00554c71d918c0fd474396adbda96240. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZFZ62047236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3163d5a2ca3c3be81ef3a460c36e253a2f2521fc1e80334eb5d1e4ceb84dff. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZFZ62047238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95493742eb23e7d1671281b1aede685bb5a522d119bca778a9f2f2e80a89a37a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZMEM2053193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277e97cbcc8989e0a73dad67999443f3acc9e470d15fcb3fe6156098a1a0187f. 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/QZMER2154796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c4100d1f71d32ba07828ee8caaf213c2af9371e16d4a38a011b58fec59a6a5. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZHN42145722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26103982b543e75e994e2df39da8941370dd5fad7fbcc2c30ac444c343f39888. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZNWV2059370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355c205308f187b2b6ea215a124052a1cc62aa491f53ac80931b08a03f799cf1. 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/QZHN42145723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46af3677ed8409175e34c865611026da3b5f7fb7dd07873f46b4718a73923de. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHN42145731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3241fd4dd80fe36bf1d028e43898f1eeebb74b4fd020b10e4f2c2c14eaaa76. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN52258207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b85defe40c78f8d08a806edd2184bd79729ea075ca7df37819627da758de6a0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA42385746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15215e6b6afd48d3c8e3624fbbf905ffd9521a9fc1c0e165111dc75828d121dd. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZNWZ2285186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d086db6b940822a540b253b78a3c8de32b3506cbe887d1d141303466d294026. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZDA42385748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db986b3f240b01b4f5efe8e150b84137fdfcecf1d3d91015e44ed529793ea87. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZDA42385749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd81946f723ee40259122fa7e5b32e8427f711b2213f4c1bcc33bb3bc640261. 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/QZMEQ2392336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad78401fe0eacc08937c03fa030a5df4408565ec7e077833d420dc6e57818f70. 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/QZTB22316917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf44e8d417b61e259ba014f9c1e5bb8676db0d2423ff685365da3e05b27d573. 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/QZTB82340579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0de752f809ab2987b8a1662ef2e801547de54bb38868128317300893de7b2e2. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZTB82334626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d24fa0179c8f193e0f30874d2997e6166641b36ecdb719be998a23db6cca7c5. 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/QZRP52326917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f00a7e478634659ad2dc563c70200d0177720e2199dd8b78840a1d2f0860ee. 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/QZTB82340585.