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 0x539bac0636871d15ab895189f27a3a3c2ae39879bca7657554c2676f702c61ad. 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/0640ea4f-e676-401d-842a-48c091c6b397.json and https://artists.proofprofile.net/proofs/artist/0640ea4f-e676-401d-842a-48c091c6b397.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 0x66a9e1606f7ce13b2d26cd90fe797f4052b1820cccd763e00bd3f547ffea19d1. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/JPG101000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99078b3f77ee0f667847811a842ef93f4173e2ab94f4e1c2eac288d1c81ceaac. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/JPG101000128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc69d740afc409732d0de75de393d8bd089028956d2b1d20c0afd014dae7599. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPG101000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8835867424880ff325ff026db0dbfe6e7e40dd466666160bea2440128282e740. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/JPG101000131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b10c08cf5d80f0d00d7006c8f96804c8def38aa0c8808f70cf1e588eb94ec37. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPG101302801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bdb0cc095c5974b53332f03bb793c821d78a8abfcf05514524610aa0ed2f55. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPG101302803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7f96b685bfc72e38d478bd20965f732ff243ec945e588ae9ceed6cca2fead3. 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/JPG101302805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7eff40383677154294ea485a9df14054a74297b7147552fb15fc0af61901646. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/JPG101302806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c690b59c73e4fb55df6cf2762aa742428a9f3f95498c64b0eab11cf2c512ecd. 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/JPG101302807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe754601d1897d7be496021cff13fb435163f10cac2562d12b57b5d575ffb6ee. 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/JPG101302808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f2dd20be19f288d01b52751e4e6c923bc21991eeed740fa11e6d41241904fc. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPG101600119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27fd4408d8ef7c62aeaecb819f9eb24c7c3b589b657debe8f87fad177823487. 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/JPG101600120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce052620ae8bea5e3608bd56cf989735ac9c0ec9f9ddb7c501d4d0eaee1d7d6. 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/JPG101600126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988fa446b3c61aa9fa354d9f784e7d4d279dd245ab0c68a3f891ea955760f6be. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPG101800282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20d7d4d0c12fa4674a82fc3fa8f27be191aa5bfb6c4a318169477ebcb66bb72. 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/JPG101800283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321b9f5b5b35774a7628139bf0a9b0c9b268a8598ed65b88a7fabb68515586c9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPG102200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1af7a229720d09b6d31a45568374094634c969c07a6550edcdd8362dd70bd84. 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/JPG102200328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae8a8cdd28c7e518eea3e4d0f740ced75c4ceac8cc5a0ede5e8c9c00bdd2b76. 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/JPG102200329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084414c4b22580f3ca938ef3aca0707c6cfb3a1cb87a2139e422a3526f0757bd. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/JPG102200331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8178f782ee798a5bcbcaebae3d5a0ffc5e2437cb7f75ed63ceab57d191743019. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/JPG102200332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3a5c8d45d95f3e66526064218747f21e4e4cf63f5b8b921742a9bc58118d51. 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/JPG102200333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dca97ed0f09b585a6a7e9edd13e5e4d21b31aebb3f3480b7214b62589c6115. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JPG102200336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211b21ec6dbb6de0bad30e38a384bdb3617842f61cb7d2779b01f66140b790a6. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPG102000755.