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 0x0b26c5698816cf7ed5879fa5e3e2c991cce64995872cc7eb4ee6cc4b964a1d49. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3db498a-2186-44c5-9fed-45462903aa5a.json and https://artists.proofprofile.net/proofs/artist/e3db498a-2186-44c5-9fed-45462903aa5a.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 0x88275bbcf2eabfa09b9d7dae9600f345182fb33658921f889b075a5122b05dc0. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZK6K2100572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dfe9b8b15f3379f10eb35a05ba85aabb78210dde89b6b93111d37e7d17a73d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMEU31902892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbf03a67750e39eecb213d517633b1be44b8eb799f4f17b115ff9c9bc59de0d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QMEU31902893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb171144e0db2d2ff7057ba82b10338f9c36652349e490512620588804c10a54. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QMEU31902894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9026326c19deafcfed5abb5437c3cc118950ab91cbebfa5dfbdc81844f565e8e. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QMEU31902895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0160f58aaf62e2b88294fab063bf58d556b2ad4ce7b8415f88a64abefbd7c5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QMEU31902891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3976d9c7e814bf8315f61d81b464e33bd06062296740be966b03996126b823. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCADP1808157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4521bd11786d162797cbc93ae844de915609d1c4c27bbaaadb4455f847b9c7cb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMEU31703510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b00d64b84f6d602f804b7af3d78cdd4d8e0400785ebbb1aeb4aa59a2bd75d6b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZNWV2288659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd794ef2116556fac738879c9a8d3692e0832b6ac99fdf06b899c0f5e2f4de1a9. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZNWW2203353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82d84940902e6817087e8acbc830c4529e31a636592e4a3018d0c142f25824a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:59:26Z), 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/QZNWX2213830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7750c474ec8518f708498f9a7b288f18b66e2dd73bc981c818a86ffc741349c3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZPLS2293000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f20ca8491b133a1812154bc9f8cf1b6336c005688354c20ddc4c480472fe6e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:03:38Z), 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/QZTAS2288806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edc778e5d974cfc84567ee5565e162d49cb60d6b1d0b8debb649d91c24827b1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:09Z), 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/QZFZ22347293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bc2ceb657aa5b95be5c013345ad955bfd232c542d65ef253c0a9e8a5e16ad6. Chain 2 (Bitcoin): anchored in block 957566 (2026-07-11T12:26:02Z), 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/QZHN32371923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e747c2d563bb610a7558476e095022fe398653872b478168095bbc5293445e. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZTB92308953.