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 0x10e9d6729db6ea92a61a410fd4219e0880bee131cbd8b664a895c091da43e50d. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb8ab5a4-ea2c-4c32-9a0e-89d092363ad2.json and https://artists.proofprofile.net/proofs/artist/fb8ab5a4-ea2c-4c32-9a0e-89d092363ad2.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 0x2530cb41e441b48abb47c2c9f735ba160e24bce77019780ccc29af4b91374202. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZHN62290780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc318c647f1659e30df7a45a00cf7aae35ee8b8cb8b769228543c040d38484b93. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZHN62290781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbc29d3e254f450eaa4b9945b0675b32d3b80d0b0a26e08739b4857c089da41. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN62290782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa132e3cd6b6be5c264c2fbb3af951aa28b38a7f3e2f2ffc87e16a8204e9966. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZHN62290783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7fab8ab822b21141766bd8ade7236b4f66b2f9f2a9b881a03589b9ff5859f4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN62290784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1049de452c7fbddda838ae70cc3b5fe2f74f7fb3f48933fa1b02414323c47d3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN62290785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe949d98da262ef81b42785374df9b618221217a85790e28944cfb4e27b5c611e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN62290786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2883cc9b9d2785cd23abb6c3852dd33d10a2acfa1e7e579ecff12d7fb4309c97. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN62290787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42db96efafaf921e603a101076e0fba8fccaf3cb018a7440ac2ec808ba7374e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN62290788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a478df3ccfaff863556b03e5e86b9ebb1b86f90d2a15907441d50c317d8dffe. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZHN62290789.
Histórias de Lobos - Entre o Lume e a Escuridão
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd553c7d8fdc11f95eab0c2e81ef0df70991d3212c4fc133b9b2227b387d10898. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZK6P1920126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44584affcd4d10bf3b568f3dfd6655f9b8c2b9b7cdb0834ebb1e9725ccc4bdd9. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/QZK6P1920131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8796ad5e9f2e81d85f7afc1245d94fb0e24466e73a1436f32164bd4ced9eaf66. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES71849193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8f345c5917837fe089a9bf3eb9331a23202ae21513867da5b7c010785688b2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES71849194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225bf9e70986722436b76436a8579347be7f4e6c5e3005c9226d486baf318a7d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZES71849198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeca2f63f3d3cc3d3fc63e0e09363e687f7065847dfda1de1524b91a6ee1e77b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES71849200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f1dacc03fac88aff6c1efedadd5cd6a7a2b8ae8ffde6265a41028efbbb85d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES71849203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e39fd11c8b96208af193dc534eed0604e58e8a47ff12cf38916a0e1ef333e43. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZES71849213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8f77d548c552ca871be72e3f24433cb5649ee54d862e3ddae153d3f3f4c068. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QZHNB1982903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe148ac34a6d540d5a427d5c4e3b25024a2b60662eb63a5625039d206711135e6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNB1982904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b04f7a84afbaef63dd345736bf128e08939192bbe9a40b7cc8c662703f3d189. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNB1982905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910dd7f764319dbade6d2f76023549fdcf3aa61edfff2ca34bda8ccf1867e8bb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZHNB1982906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a61e9c889eb1e0e71937a678c5372e1abcd66720f0d380f25b2547fada86d65. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZHNB1982907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bc86bcc4dc9410c3647d18bcb8220e1d5dde29a220c123d86b3f58ca860e70. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNB1982908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb2305531935239c22b53673760cf55fa4e148867c8cdfb2b02a388ae1d7922. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNB1982909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9252366a0d8cb4edd02d934fed4873aa879f5219a567839d3f140f47dbd87f17. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZHNB1982910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb191d6a674f09e825d047518cc8a5e6ec90e5e07a9f9410192103795900638c7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNB1982911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ae117a7d607d3e59dedd8f59f2d4e6882a3b4623d9c5442400f4a650ab1099. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QZHNB1982912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70784ea30c5d1ded34a4c1c9c7cb4b7fb76f3517d49143c4a9fb30356ae0026. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNB1982913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4493383e4855d15dc81099c02afec93b0caf53e5699a98f01417f9d4ca76b616. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZHNB1982914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e579c5deff712fb4057af783c316edab9ef05ab9e87bd03732b1d13f9affec. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNB1982915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb63de3d01164e04d023d5a204c41f15696a699525d3041f80aba4158de532f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6P1911842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470a0054d1bc312a7efb7e0d5ad0d081026e269705bc178734e435a09ff66134. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZHN52454141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88334041bfa1a437bc7d76237f626c11c9cd5964d754ac9bef317491e8f6cf9. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZHN52454144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e8a0d1b9839f54bda5df1eb1c7598580aebbebbd45d10035021e976ea4b76a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHN52454146.