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 0x9917405ff20059349893a707918d711b74ee66436add4aa5ecb82ed4ac059172. 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/bdd10f7f-2082-4842-a27c-733eb109162e.json and https://artists.proofprofile.net/proofs/artist/bdd10f7f-2082-4842-a27c-733eb109162e.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 0xbf13200c7a60c99960e3998f71474644434d0e4928d9edc2579ba67307d6f201. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZHN42028751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ea77e29c3e76e7ccae37a71aa577c68bc33e4af5a438cdfb15c7c05134baee. 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/QZ5FN2160672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044dedf1a7d6a35114db3319213c45c983dd61b859a1043283dab486bf259513. 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/FR59R2196740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c1dc9d9866b388581ffa64586f1ba4b70799f09f911597353f6d3e3855c45a. 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/INO132200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde94ccaf78361043796738f13b3cbcc5775a1d21ff432dda39b1d3e6a0b6062. 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/INO132102446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe775df30ee48c70acb20cbbaefec16e418c43ecbf523a4bdd986d5242a03c035. 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/INO132200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aba727b6e017c5d892bafa6108735f19cde943ca1c201615859449a9c9fd63. 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/INO132200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb815da5865bcddfaea889edc6bc2444f29716c13357ededa8b5772356d7995. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/INO132200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1197bdb0a62a9b3444980bb21401904d275a737afe32bd29c5dc1764d43bad0d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLRD52220396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281f11a507e646b8d1a3cae4e68908bf5eaa7b4537a8a94ec0090619244aca77. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CHF032409230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4290b3139070ae6d1221237ab283f4e4bf79e4d4fb7bb91c88902e506b553b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/CHF032410642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d83fd03b804a3b642773c8664b48e5ebe576cdfcd5d873e35844689e3f7334b. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/CHF032410643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5759550d09309d8b09dff12c610fff38f26f6423ea863b7c7e13f38605f55d04. 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/CHF032414205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b6aea343c5faa09399fc91e3aa28e593aa3be130deef9ff9f32c450f0f9ebe. 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/GBLLT2132697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda440b7ebb76d927705bfac957eb3de0bf755291bb5897013de2d551b99ef7db. 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/CHF032396791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0c5cc99fb398c8fbe22e4dd36b538f46adc244040e74da694ae0244a6833b5. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZNWR2242406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69488c3578df18fb887a9a4cdb026b970d1584ccd2fb17c2ddec36e5ef007c36. 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/QMDA62282611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c55e1f8bcc39d9c7650389e898d7bfdb9fbc826845f711c709ce38f7e6ad08a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INW262403078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe130efc3fdf89ad190034e46b43e79a24812205d7ce2f21ddc889455049da4eb. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QMDA62189786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50ffa175c347c3efd9f111502b4c8c1869fbc6c7c1e1a4502fd6f3c84d67b5b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282531137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a1f0414e47c00c9c6d0ef9ae67a4929f032c5243aea52a8fe3d71b51a14f17. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMBZ92299094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afd90d03d99f57e06d82727d238a3edf708310669b543ee10189089852d7cff. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAHE2385345.