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 0xaa3a0590ad756f7ada85f6bbb778944752c549ba6991cf3b4ba0b10a9058b540. 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/59d927f8-de95-4d50-95d0-f64f99c40e4c.json and https://artists.proofprofile.net/proofs/artist/59d927f8-de95-4d50-95d0-f64f99c40e4c.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 0xf4428fe95e845d4b98a463d297ae61dd997767456b4ef8ed6d7cf07edfac4308. 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/QZNWY2105707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c154d759a36f8abd9fb3fb97904e587a1e0c55d4c954ac2fc00e8cacd9046e8. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZTAU2140436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91cad9ca15863fcc1f3af85dfbbe675b5bbd42c9d001bdc67b01adba3b04b07. 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/QZFZ72248886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57add21f121d6f3b933acc3a961357fe6e5b7b856b5bad06a6f4df99a88df42. 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/QZDA82299699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44785453941ff001de45b637a08079380718419e7788603bcbbb8388f08d08d2. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZHN82251604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f2018742e23db10345467ae2ca4b247c2d029377299130e2072808b2a68661. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZK6L2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5664f80ff993dfddd264e5a9040e1e29d39300f0b9c6fb5caccd8d7ffb8d878. 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/TLREW2226069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a5323467e23ae7ae5d1ed797f91fbf3ab9524683fbe78a623989b38bfb2b83. 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/TLREW2226925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8d73a2fe58c5a1b009155b733e0d9f1904a3b659ec3dc23a06d33459829ef5. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TLREW2231167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d9f4c5405a6c5c48969081bf3aa8690003da4d9f467ec38948cdb12cb21a1f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZVEM2331499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff02ff0cd4ce6db6f4933c26946b123bf04a86f7edf9d10930adb79795e7da7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZVEM2342104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6a28278711e89712b27e84c2e61139944eab0272dfdba05db0201ee60b6f35. 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/QZVEM2367675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710ccabc3dbc76f58c57644b37f0e370dcdb48893d6d6d9a93e8286eef31b5fb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZVEM2397567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d000c81da91c92d76279c80abb5cac3a5aa91f954e1f87f6df9da094ecc2b6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZPEW2420483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4fa583923e31eef4658b7e0a58ce82a33717a33bc65f5386f16dc6c84892e4. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZPEW2423033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de155bd38face607a77f9b2c968f9ccaddaabaf569511b77de20382abef8325. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZPEW2463017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc439639cd125cf8002ce15010abdaac6f9819fe9f8f8f442a088365736a6c6. 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/TLVEM2400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b49392e2574729db0a23de432ef5ace93b35f559b79e07c8a6c48c8df340f8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT2VB2436716.