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 0x97f1f4090e23c6be9fb28e3d319a49e82c7bb7b456601ec506b5f5fcc0a3b5fa. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab764b8b-53cb-4b35-af8d-bd1eb865626e.json and https://artists.proofprofile.net/proofs/artist/ab764b8b-53cb-4b35-af8d-bd1eb865626e.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 0xc04e69d2bd68e2e9e2f1509f3615c0ceb9ac980d252a384c2aee28c2eb18ea19. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMGD72401246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430d0448c1581fb4fc3f41b185c08db985e46cfc7fa5b5996c4fe15fcd245ff7. 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/QMGD72401245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb466cfdf1b581290d2265620ee563c30f0e6503a0bef2a3a90598b9a21819bce. 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/QMGD72401247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee7e6a6ce938c7675f975642b913f5d151f316ef7a172167a0689e2e8ebf319. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMGD72401236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9390d6390746918fa2866684cf12c8e5653410288d1ebcd7e74a9033bc754339. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QMGD72401248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cce6a141f7ec4e879529f4e1e18574b0015a33fe50a5e7d30a49723b56388bc. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QMGD72401249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c17066ae15915580abf710cd987094b250af70cad1d57f34f822db293f79da. 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/QMGD72401250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36bb76be04dd459c821321e79c40fe000cdf76a4d47d782cd57d1d13a670f61. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QMGD72401251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9b3041031cb47bd9c8a918491f68af630227370ed032544b1d58a9f1be3775. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QMGD72401252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42db6edcc19c0641db13bb7463c912baf68ee0f96da3bac2926c8daf882b1a52. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QMGD72401253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6e650548eeab561c0582eb8c616672c040a1a0dfdcd037e857f3f4f1ab40fb. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMGD72401221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6a1b13ecdb45555efcd69a8e310f977eae75205834aa31b051cada227f5694. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWFK2481276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c17066ae15915580abf710cd987094b250af70cad1d57f34f822db293f79da. 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/QMGD72401250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430d0448c1581fb4fc3f41b185c08db985e46cfc7fa5b5996c4fe15fcd245ff7. 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/QMGD72401245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb13d52d51c0a9a6533fd29007304dbf1252419a250ffc3f219bbb9efa579cb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMGD72301218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b7b2c25125e5274e3347b122337a48da877ab850bc1db6ef5d865927e9f6ed. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QMGD72301184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5d6c66a974a8c80428abcb53110073c7f556839567a9d4d4d60e08e0cc8213. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QMGD72201138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57de665fd1c5aacf58a1a30be26ccd47dd946a9bbb9c3e9a2196bf6c4eb292d4. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZWFL2486078.