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 0x5f7eec58a12deb14f17da33bd7e9d5a31a2795209527623792e0ab7197d80845. 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/e678882f-2ca0-4f9b-8122-f170804da640.json and https://artists.proofprofile.net/proofs/artist/e678882f-2ca0-4f9b-8122-f170804da640.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 0x2e61cadbb968211a64178184362472a6bfc32935b2629763ff46a56b744e5bc3. 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/QZDFP2019381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212cf41c416ee07bba6226ba29f3099ff6e2c3a6cbd42006e9493ec22bbd1bb2. 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/QZDFP2042079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22d5a02095f00e1f656cfa9f9ff8dd237d324f8e6507da8ebb47f521b7ff9b1. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZMZ92492992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250a91125e22bb9bc18dd01b0c61c9c2724ef43d14851a7790bb33a09b4691c4. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZNJX2489539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d1d4ae6eb703d78494e25c216e8a8a4e283485c91b28c0259b140fa0df42e0. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTVM2416016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a21eea3f68f997ef1b345c0b395184e86e71538a088ed9d117972bb96aa6ea. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTVM2453548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9f5b65e5633333e378ded0e24a4dff9eb6f88f3db3d04507bd0c8802908b11. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZW9L2449050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489e3f7103566b45364fa4a545685b3c2124a0cba414c6f202a67f86e9c22a8a. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/QZW9L2495166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe309d7edd138f38c9698e6d8a6f04bed14730634527f6fac19549a98a1d0a5ec. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZW9M2440948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276ded54bb2660075f875795b14dfaaf23e239c2ff3955e3ac303388b1e3ac9f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US7VG2524433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659349ee7a58595465272caa702b5cd4786278d162d98aba67da92f022d68993. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZGLM2506728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67556cc87ddb836aab79e7dd22110d4d2c632b2cc273551f96026f68b65e9a8f. 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/QZGLS2521406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41da33b579c9ab6f4d55ee7b5d9c69164af76455877b2e6fa90c0b768b38752b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZWDW2501920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cc81499e0bf1a507f51c6d90a8e954c7e56c69a9e37754ae002504004271a7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWDW2586297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bd1862d90937391342c80e62665903ff829e1848b5bc07aa99f75f88af5c6a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZYFZ2505995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9864f251b37091e45d87ac70e7cf4de53967dc4cff99a4bbe15ad4a6c02503c6. 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/QZYFZ2516163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970f613831de0089b382d760dd265dae1f18f532ef7cd501e693bd3bc2312511. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZYFZ2522414.