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 0x5f9029122badddccfb63cfe022e078a8c5e8c8412e8ae00f738b92591a5d4a99. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7e13d51-3402-4182-aca2-0dce5399e66b.json and https://artists.proofprofile.net/proofs/artist/b7e13d51-3402-4182-aca2-0dce5399e66b.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 0x4af93e31be4c2fbaf852b60b86c485c8807224bb32d3513899bb9b4ef7527fb3. 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/QZHN72081091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0738ad5d1cc2b5898a806cf5ddac02d2b65e113be06629563cc855ecfa2a919. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZHN72081092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa098da519f8734601b2d089b2b4d81531c87068a580f58aced8d997e698c36c2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZHN72081096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f665fea27a89f7e387ef059adc6f7f968b5e986fce21fa4995f106f5f107c9. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZHN72081098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1985cfc03c32840a2769c0d033c4e1ed8b766dad8c31f93b9dd85ef2e3b07b. 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/QZHN72081103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd67ff2a822a7139855214d9bfdad88620cb534dca9238c6da4553919f04ee5. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZHN72081106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ca25fe2590375bd1acc5b67548f8cc3df687771d38893b3987310adeed7b4f. 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/QZK6G2193140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95351493a73d3e10e64be07b3f40738f6160fd89f07b0536c63ba983e19b042. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZK6F2140936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c2974ba2b6a7c706aa153ac33b9e6a759d48fb22c06cd27bbf8cfc0b9020db. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTAS2117844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffa027410addd159b795c2de0f9ad2e8a346081af50f21d7e4f8eab920f0bc5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZDA42242329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044ea193540f95dfcde639fa8d81c02c7cbc9c98c640a740abeb2879b7e51e1b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZDA42242334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994d21def8839b528aab99d1c023c8d4d1ddb75702d30663d78a35e8fb98955d. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZHNA2143014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd081a591c7900782f1bc324814c83d53c215589a50dd952a2671ded0a1937755. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZDA42242335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1799c2474e9860e0c3adedbfcec96cd67316352a47c9325945e856a61d06b8. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZDA42242336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa608f0a1f08bf0a3a6a5a3fa330263bc375f6220841bab1172532b8fb18b335f. 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/QZMEM2026734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ccbf7ffc8adcbe5bd63b587f706c518435c2236a0d092cb2a85c20169ee026. 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/QMDA72364565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8772d48d332fd0762781f578292678761e3b94f037853ee56fa177a18794c1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX872519562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875670640babfe09882a83cdf117a4a614a9ec8b5007296d4d647bc5ec79f74f. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/FRX872576272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceec66d3d60a680093112238cc1ce34abbce85fe32d6f139100f8a32c88c010. 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/DGA052511727.