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 0x306b20cd541317b6a471f8101f9e8ed399e843c93bee7468ae54a58080a29286. 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/8de85a90-e33e-4835-bae5-18016b511646.json and https://artists.proofprofile.net/proofs/artist/8de85a90-e33e-4835-bae5-18016b511646.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 0x32fa6894fdad4e25006af6b49584a90b219e06060f9fce8874fa0b4b7d190b25. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USDY41862274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20536a07a1e98734dfd9472c456256dbfaae318668b3a7ca1f822dabf420e64. 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/USDY41862275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b93ce2019c6e152e1922c00d2e5fe52d58eff17b619b4f1eb1a718f6df0da4. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USDY41862276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3725ec37f611cf3a16ab5853bb995bcfb1d5a31eabffaecd1441a428b60283cc. 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/USDY41862277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040d7abef983cf60b3b5532893cf9fc03a56cd37bc60dfdff2ad4420bf977a76. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USDY41862278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2593de45f3cc0dc31d2d674e61841c405c8854a7b367e9fd4bb6081cae8ad4. 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/USDY41862279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca1ecbd485324ebb46fb3f3258f99f379661bc21a54b512d437dfd113d4779d. 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/QMEU31811216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47868dfb729062f74afa3117896f03ec48900e16f7ad820e44ee821eb9d9a612. 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/QMEU31811218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbc01ae0246217452afd0179c08cba4d90dbe2f62bbc529cb4dbf0c1560ba29. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QMEU31811219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd76da187565e58cf52c574450c4213378d8531bcc39d45015824a4f8de54a5b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QMEU31811220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9cb41b9729765763fa9f4530df5ec673ed5c7e5031d8c472e3b8cf533a22c6. 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/QMEU31811221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d198228c86376ee67f721e2fea8580a3caa9785c8aeb24ebf0de44bb1361c8. 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/QMEU31811222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608655f31609428481d77fc88cc25d910c4c9b00e469f807905a6c109e71d340. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FR33T2055603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cb521e88893aa5e7cd9e9c70389f0fc5b2156735a71fc4f6970bd9949ef788. 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/FR33T2055606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea777fda1179819a71a4567ca40aefccdf2e1b099776255ce41adde9e667b90b. 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/FR33T2266902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6968ae04a715970f1b69e92a3b088d6246e9a99e0d7f6c7d0ae13308f1e38db1. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/FR33T2266906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f3520e6bcbebb8f4d14d1ae72f450346e462d0bf5ffe4df386f2bba93d93cf. 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/FR33T2266909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cceb1d07b7412d88bc549939291b38b2b4d0a584890bd211e965058d6e30b24. 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/FR33T2480803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8445036ae819390d4d1738b190af83374450f042a6467ac365faab74221efad1. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/GBF862554402.