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 0xff5836e1be70fd980f6490705db444d9c0824fcf1e7021ae04dc7600dae390bd. 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/e6cb727b-c393-4205-a058-b4c0b40931ed.json and https://artists.proofprofile.net/proofs/artist/e6cb727b-c393-4205-a058-b4c0b40931ed.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 0x5ed759d82928c426727d8ed73b8ed0c9bd9c92378fad2b9aa66a04d0cc444f39. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/ITP981000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fb7666e9a93967e110bd0c9d14869c631c3a388b76f17f76a1ac086ea09c78. 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/ITP981000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4049a02b9effb7096ae02434e3a5c6801f95550ef5d0685d795ad71663d81ca0. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ITP981000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa53ea47654d80ede6b9cfedd5b8eb10f710aa9c00f68708ff9e9ad9714acc7. 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/ITA222474003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dbf9be1468f68c4d05f82a4d3b1de054ec00670b166cfc1e5b215942ef696b. 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/ITA222101009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a9d8c51be1115c123b736fb105c22e27fc4d8b4a69b1502d835ec0c65c18fa. 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/ITA222101012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5bc556c9c5a24b5ed9d34cff2bab9e4f50142fbd7b65bc680c5aaf29414900. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITA222102001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab59fcd3eed8344c29562c839e560841cd1510a224d1f6789d6810fff31ea44c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ITA222102004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fec49b8511092f13f2e95898c2eaf61ac95b9df2a5293c5ca2ab2c439d1c67d. 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/ITA222102008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3569d477230567b65e0be7c0739958ec9ee8c3b14052c042bafa11f0594b405. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ITA222102009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a374c99d000948ddc7e86b9950dce54237c6da992532280f2d2ab90c93cde1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ITA222102011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe278dee89ac46fa2c5fa57385dbc019fd35f75288bbb33d1dc14a7c90e7901fb. 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/ITA222102013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2615cf386b62d20b87842849056ed854626340a90c161078b8d0d14eaeaaf60. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/ITA222103004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00303f13f93c0699a9117b5f68f68cb3725efb1dd0c7f1a44f55e24657b77484. 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/ITA222103006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba850017ac227ae98bc25e0438e52a82b06e2c07f665b110b1cd472cc31f90e. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/ITA222103009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4ad87ad128996e29e2a3addcd4f2414ce0fdf9278640a783d18ecf0704df11. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/ITA222230001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630769b0e47941f49efd7c93b435e9e1384d0ef115f288f0cff294f4515f3037. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/ITA222230005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd855b037fedd56c529fbf83759f4fea0543550e71f5945784b2bbe392cd88afe. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ITA222230015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243142697e9846e609d92a903e3cf2b7266969023f996e0c2f6974d818c5db22. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/ITA222231001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5c0a33b19f06676ba9e268cdc87b192ad282b6b4603144815a82ca064800a2. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/ITA222231005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a604eafd9462a2534a12d2044f6f194d8abc35f1a8993b7fd2127ada9924d0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ITA222231006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142cd28030bc2ac9fd5d7fadbc81e2c69e274907712ec0666f9f3fa66c16a48e. 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/ITA222231011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5524bb6d2a11cc74aa824b5491b14a99022f50328b7191c09191cdc4c459f384. 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/ITA222303001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a914651becae4db3ea8b082e09eed339c210191c68cb0c2f708ca6d6d71ab33. 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/ITA222303002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e0233bf81d954b38602c184db7af64750becd385178038730a85d1baa6c427. 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/ITA222303003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc286e99bd6b909ff29a2dfb26260eb32074be3db3ac609c65ca9c668c9232b16. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ITA222303005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff354b627c2cd71766e101f5e385d9752ef7b82e3a24a34364244cb69ea6882e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ITA222303007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baf666c016dfd1312116136073fd07953c3cd01afc1f6f3ecdce805a0e1f291. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ITA222303011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197ec54a0fa7fe26006471e8b465671045f21e9859df80659155c7dde8aa1d30. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ITA222303013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b9d5fdc7401ae09c2084eab3be506b2773c6941fdbfa609e7333cf999de363. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ITA222303014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13388c5f376195281ad5346f85a304f89a049eafe6687f02aa1e74ddf66499f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITA222303015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58f30105196b1d0163d4a6a8ae2651e87e48816f1422a86fd733886bc130637. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/ITA222569001.