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 0xd0b08e002970cd17a812cdff412fc662baaf95a5872ae2b90061eca0fe98494f. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22b1154c-5729-4800-bd1e-582c400024c2.json and https://artists.proofprofile.net/proofs/artist/22b1154c-5729-4800-bd1e-582c400024c2.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 0x6cb55faec41ebbb254734ff447343655cd77f182e4b3c095a8e3b53f835d8feb. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCAFA2048727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c7aaa959d4937ded9257bc396f2fbb8bc207c162e5762bb9a07f3d4590012c. 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/TCAFA2048729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7846dad8f92b17dc5dea727f4e4f6aa11a5212bab38a255581faa89a710563. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCAFA2048730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b931eb4c81aad04a5cec1bb232152e822a9b12c8f9a4fc09c4f2d6f444a56f7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCAFA2048733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0721d99196f653f05a1cfe36a6465af34ea3eeb2f55ea79f0f39b4b73eed9263. 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/TCAFA2048735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ddc8ebe76c302260f2a404485f9edb45b84e0134809cbcc73166434a5227f2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCAFA2048737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c30712479d525e494825cdc3a4cabac887c43b239c933d4355c212a94cc7bef. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFA2048738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7955246ea00473360e929173813d76773825525410f7ca02941d81b2e70071b. 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/TCAFA2048739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794c4591f6e255b7386c675a1f5e44325cde006fecc6aae95a01a1a4a94e3947. 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/TCAFA2048740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e085f57ab64baaa3ffb323c341e4b55dd69513b310abf5b4a004068efac5cc. 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/TCAFA2048742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e54f27aa44b7327e9e2d71353beb712600ef92d89c0d404fb59ae9151c7f26. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/TCAFA2048745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e2e9484c179f5007806daa6dc26d9a70fe1c6a9db22e0440d09213e4a01209. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCAFA2048747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b72f3368ea9c292abdb4ee11619f17088ce969ed2266f7fd4774de0950a398. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAFA2048749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e13c098a09cb2c56b6437e46bbd794a9553923c821ccd11e0fbc4706e1ecf7a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCAFA2048756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0afcee73d25f0c19b5f878da4c782fa17cbdb44d15eb772f578d6bb76e1a8b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMFMF2106596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3149e4d051f4be923bbcfb41b1dfed3fa59c92c8c3081a6098682fc57deecb. 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/QMFMF2106597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf6fb80bab2a0c6bcf19cc5b462a580e304d162f69bbdde585390258d2d0975. 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/QMFMF2106598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b035bec32186afd65a97c32af62ec02c0b8cc8c166080a76ec027a22d8f09e. 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/QMFMF2106599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d087e053c20ae1626ec6626651872e2da0e04488cfd683d9772eff48ff8f973. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QMFMF2106600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31318ad7270fae211309bf5a2c91c3e6fa4452facd47b9d9a5770712008ef32b. 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/QMFMF2106601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef7f13a20d91b56dbbb0df60bc8e78554e7c5859abc99d5c1835b9b30c2ad62. 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/QMFMF2106603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0afcee73d25f0c19b5f878da4c782fa17cbdb44d15eb772f578d6bb76e1a8b. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QMFMF2106596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03991391fe6de3e307ab4062f465326c6e1a1b6150a46562072c6b235b14663. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEYOK1944068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474ec8dd69bfccb4a47fd93f1d7f261a6f5802948eeb1c3c19278aa1759644f8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEYOK1944069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860af5d83eba62ef9fa7997d4ee6b186c93c78e69a559cbb7596eca892612a53. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEYOK1944070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63caecbd4e719e362429c0cb427d72bbf160c05038ed596b7c5f9883429f113a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYOK1944071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b746526092e7cf678b5cbca1cbdd297066791364c1e93241e76a0dc87375d7c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYOK1944072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b30e40e487c0bdf75e98efda82d32d1335da7662701515257e4d3732ed92916. 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/SEYOK1944073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf41aa4f09566a6487242cf3e7cd042aa8a455a0257a1e19405489e3ca1ae4e. 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/TCADX1830429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c346fc70705fdb05fd2375f722c59fb4bd149708220e9a9e313d349f8d109a. 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/TCADX1830432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4506a2a99486e370119933df391e3cff76e7e57835b3aeb5d528c287b7e628ac. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCADX1830434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf510513b2eedfda42931d884d5c303aebc77eeb079c54f9b6f11a18c03fa4258. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCADX1830440.