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 0xe82039f8ab00ddecd5a76a90e0aba1c34fe178f3109a99b2d42066c01a2d1cfc. 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/ed6b4654-3601-43a1-a7c8-4823eae98021.json and https://artists.proofprofile.net/proofs/artist/ed6b4654-3601-43a1-a7c8-4823eae98021.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xfd5864ecc23e7ee5f0f6522af7f092f1721880ea79f0896c84000730f9022c8e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:21:44Z), 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/QZPLS2450633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c372a868a787703caaf1877b6db539884449e99d850d009760a4dd742dd112b. 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/QZDA52551130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b401eab787d9700891984c8a6658b2d8cea1ea84f9b62dc8097adbbd54e5a8b. 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/QZDA52551131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ea5c13eef6b84ab1c72cecaa410445a7c422a07a1715a2fca9dbefe9c696a0. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZDA52551132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1d26c5eeeecadb42c6cc0177c8961c4809092d982920e073e82a87f316cd9c. 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/QZDA52551133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d35ac4fe71f39ecc2ef8db87f652e29836280142bf95b2f3ddc2bfdb33a282e. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:13:16Z), 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/QZDA52551134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a70dd8d6b1626ae92201200e88a2b93a64224749a87bc597b0b6f14b41d526. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA52551135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a40e32b205b7df7e8fe6849e4bb1ac661494486a9451363d1e6d32cb74670a. 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/QZDA52551136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9236c26a7793416099729b763484ea65d4b368b25e0500cc772349f4040374fb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN92479188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f525f10cdbf14091c6350b40ee67c8288da46cb77da00576dc3b76e8b8ba634. 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/QZDA52551137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac70e8a6076af5459e0edb91c2dab5c87c321ca359678a5506a9d36bd884a1c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:01:23Z), 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/QZDA52551138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812cacfe0ce46526b58ec83939472241888b010305ca317f0d5baf2a61849e47. 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/QZDA52551139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cabac42c10b532318be28a75d78fe36177eeb76e1ec26596506e80283225366. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZDA52551140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe433d2f58efb786ade854766fa16ba50e95c00901545d97adddb700049bd238f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZDA52551141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e83ab1f7a8dd3ba0739bd5332c04e06f15586b616aa79782dbad0481312c05. 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/QZDA52551142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3396e61058e194172a33d6ef39dbd964d4a593124439f0494e1b892e11797c40. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA52551143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf86b849e8b879a28fc01e6056cd2607889725142ef8cfe360e461b2fcc6d22d. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T07:55:31Z), 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/QZDA52551144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2500a316edcabeb0df887429118f88c3ec4227d3c9984a738bc05c36753340. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:01Z), 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/QZDA52551145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a682061616f00ad0a2bc9dcbd80699eeb367abe013a794b6c432ccbdb0ad0c. 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/QT3F42580823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd762607819e36ad3465699de1a84d708fd07fc899fc27c1305de94fb24603416. 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/QT3F42580824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29111a813a6863787d121054f93378baa119a53403281e9780ca979461590fe7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT3F42580825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef113460470056cdb58f2eefd5c3c15165e5eb989c933b5a6382b8310193eb60. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QT3F42580826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8865d898c76e305159c86f5ec5563e9fb0b6367fe9f201d5a890417e6c205e6. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QT3F42580827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1356322b5779081745879a9decd5f05c587ba914561db23d0b068155c647802d. 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/QT3F42580828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea0ac9e7940cad1c845a9b50e6773155e822cc5dcd3f12f90876571cef8ed22. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3F42580829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b0f838c3e6b10f5f871a9dd2f1674bf2f636eb8ae706bf0b323ac0278cdc3c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3F42580830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62a124d212d2e34ad9a0edbfe4c698a96cd1757cc1d4a407ffa56f6999ba97f. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QT3F42580831.