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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5695f79b0a025c1d4521a3f6d364cc8cc716fe68c492854c8c370fa10ec45123. 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/dbf739c5-c902-4647-b91e-5ba3cc57c372.json and https://artists.proofprofile.net/proofs/artist/dbf739c5-c902-4647-b91e-5ba3cc57c372.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8473603d6b7d1b83ce73892e6afa0d7bd9cbeaf69cdfea1a700672caf51b365. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZEQU2103601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363a8163557222e0c817c865bc0f96665fc12b68b7de027163c3ee3505d3022b. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZEQU2103611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8dcbdca874aa8eec84718ce123fd0682f0a3e3e2714ea2e60b3321e3f828b4. 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/US3DF2264924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1fb81d452ce6703a08df4941ebba5b60d08f85f664fcc2395a780a8b60de26. 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/US3DF2264934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd19ad7b8d5bfd9ceae693ba845751eacad4d5fd9f43f3738ccb305b85277a4. 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/US3DF2264928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7ebaa01c4335531f466064ee63fa4d28f88f4af9724df4854e29a340a05f73. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/US3DF2264932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d4784761a6b756adfc72ecd3192012d7343fa6a1078b67d380ff05de8f40b7. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:44:03Z), 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/US3DF2264925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd24ad61708a46129c69895d7d7683e9553d0567eab0d93bd3e69becfef3a4a4. 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/QZEQU2105666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37f09b537422245047756ec98408d2006231ab400c1ab955780c020fc1ef6ba. 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/USANG2232645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588a22ec10d0a23ad65e712d1e5b8223ae45e9de83531c3f5948a0a34b2ff6c6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USANG2232646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce8c2d132eb6139648ebe0a82ac5ec39e87bf64bc2a2ffde8a327937d8e309a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USANG2232653.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f811790208e03994e46e4c8ece89ba6ba9b9273838ba2c3c47b87c1af90078b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ES25F2404264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd80e4de580b1e3b716cbe87893bc87bbb02d5a0aa9f183531eccc5a84c84c2c. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:40:26Z), 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/ES25F2404265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f811790208e03994e46e4c8ece89ba6ba9b9273838ba2c3c47b87c1af90078b. 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/ES25F2404264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd80e4de580b1e3b716cbe87893bc87bbb02d5a0aa9f183531eccc5a84c84c2c. 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/ES25F2404265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f569212959fbefcf7e5aa8cd7c0ca5f4b53355f4d01ffb65198134f594e70a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ES25F2504839.