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 0x93bce94664d27cda5bce5fa9516918b1814cc22583058313688f721b513636ee. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63e9f685-62ff-4c7a-812f-24f1f3876834.json and https://artists.proofprofile.net/proofs/artist/63e9f685-62ff-4c7a-812f-24f1f3876834.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 0xd4d90e146e9a8aadbadb8b8d5ceccf2b106bcdcc9a506787c7a837232a24ff5a. 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/QZES91871818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712a917c1c9b8adb92f95ee18306b9c302d4216a79862fda69a2591037fa1099. 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/QZES91871823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad777249ea71039180325f6812292ed3027797581a34a70ecbf453374feff02. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZES91871825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1762a62f9768eb7f49deeb46e047c75f20f5424050cb1b95eb2a4987032d2ae3. 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/QZES91891900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96eab75c5d8f3dc4619111b9de1f6bb3353953487c392f703685249d867db87. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZES91891904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6027db8e87ea40f4b97c45519fcf3bb8b9ef8317adf62760cf2e348a872a876. 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/QZES91891909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f21acccecf71485fdbdd89eb3264a3e38775d81c57ae6ab1de9fc547c26d69. 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/QZES91898700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed59ce202577efeba2b26f90497151305179c3fcbd6ee15a00169868f96c937a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZES91898702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf006bc5a93195ff93023b88d2a4f9af9309c1a07cb8b13cf4fe2344ea0e3fae5. 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/QZES91898705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532dce3d09bfd42ad85c9e6a150fd63a0007f5461b6f57e8e8e6efefed667e66. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZES91898712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9972dc760bcdaf306bab0759627f995e70fbafe803679c7f838b37e5b830ba3c. 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/QZ4JJ1908037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff8e94c47b86e0bd373e8d9e284366b970ed9893cd8f5a76e5668a4941316f2. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZ4JJ1908039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b0e35878134493d91c987150f359367a24c1d80bdd0edab91678944b5f8893. 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/QZK6N1998988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1edb9bb560eaae6747d069b78c0f6519657321e62208b99613a75915ff7d98. 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/QZK6N1998989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2643f1a15d296bf83736560d9379254c68042d649294a46652ade5675931f92. 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/QZK6N1998993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd4fb2dbb073f4cfab9f81ef43e1f6ecec71de50c5130e9c8694167aace2172. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDA72112263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9975fa24d282d15fdf64950d03a60f2caf56ca66cd8b61e74e1763ceeb001a17. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0P2355715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdeeefbfc24002c4687ce1da458456c6dd33adbfff6d09f3c963c7ec42a76acb. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FRX282362368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4888854cf48b601dab0c53709f14d0e39831920465cf42e11f0f6582466ac0c5. 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/FR96X2392013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6006959dd4845e35f478428daf16853d7fd168d00be678edac50b924e4b28171. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/FR2X42329838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1673dd50b2d611d7a80ea9c35eed9e4791cd0dc04adf8e1357b893698f6db1b9. 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/DGA0P2355717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf340e2891d13141cfab680e5016e1045659668aa8085ee4c757100238885231. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DGA0P2355721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73ee4596550f03a49660070ea20079d5fd09bdc5b247346a23a3f95c56736db. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FRX872448017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275afb95db4143ae3641ff714889c0fa98583b56def6d03115ebd73aa4e02fb6. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DGA0L2435991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee5ce912868faf3090e5df6c0ca5a7545ee6b7633a03eb984d7f816aa3608d0. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/DGA0R2495450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae15086bc3428d7743645fb63b824664fecd634aac5181323bce817db57d39aa. 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/FRX452541389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdeafba6769e5d983a49e43d5bdd8715e1400e639cd87216057a21683ddfe80. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DGA062539775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd046971b74af1340cd4b83fd5a4790bbc5058c75bf97a8caab0c4c548c02d2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DGA072513936.