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 0x3ad8fbfa8c186049c9f0ecd31f34a0e425e25e9bca156277414aa8d8f186311e. 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/36693b47-76f0-4190-8db0-13e273237c8a.json and https://artists.proofprofile.net/proofs/artist/36693b47-76f0-4190-8db0-13e273237c8a.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 0xd14f32aa180b56c72d007e76c965bea27e63dde78bffb53f55d68441669d97ee. 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/MYSU10890226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9f9dfd698fa37fe933010211e59761c89be6695c76a476e61a61d3f2337efa. 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/MYSU10890165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4510973d1e587da40292c795e225e4f2fdc1f2b2c99789546d9430f09570587e. 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/MYSU10890167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd35d770d9f085a9f620b29576fd224be81a62325c1292e7eb47339ff8f9a9f0. 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/MYSU10890172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe7a1926b74db255f356a45159c6e5f247bd69c7a0ab919d9504daffebdee51. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MYSU10890175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a32b02e25bfd6137109b4fa307e8f61fdf4c4d50ce6609e12c9ec3b861bf8e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MYSU10890176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89d2f67f679a67762d5dd01958eb397d6deaffe91d5a71be63454eb0fceb267. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/MYSU10890231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b590e1551ec595702d28ef4a1057a4f325b0b76ce7e0bf0fb9af85d313cf265. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/MYSU10890081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db49e7a0b39450ee0062b75d9a788ef378239ff5aa93e2bba609115cd2d69b4. 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/MYSU10890083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a8585f845716525696e7ae5a7145a49b4ed9b5919d7da61fc5718895a5f7d1. 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/MYSU10890212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc275bbf45a7d95be3ad059d553a28c4eb1161170ae5d6bd8592f8356ceabd55c. 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/MYSU10890217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a56cf01064e20bf1baee90024de39ba9ba5ab7818b69e7edd508408042dbb7. 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/MYSU10890219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e13a86c4a478cead435700edf44c1a9249b6596cba19a94b4de8294a4bc8b4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MYSU10891069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0cb14fcc046552046c9535dfc3008423b7426044f9016034a894daff033df2. 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/MYSU10891074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf577137da91bbc965ee3745b36f8616e398f1c42629e988b77a4adf898a30ff4. 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/MYSU10891070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da0e4176fdb72ef106b0de4f47496aa09694f7e5f809c10f55e9fbc83ccdd82. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MYSU10891072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613557253effa198cdb7e063e306e9da7dfaeed7cb3b97e8f3daf1862430a636. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MYSU10890304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c42127239e8454344bd8207ebb85c58afb25140234050358040dbb6caf2e17. 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/MYSU10890311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c42127239e8454344bd8207ebb85c58afb25140234050358040dbb6caf2e17. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/MYSU10890311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c42127239e8454344bd8207ebb85c58afb25140234050358040dbb6caf2e17. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/MYSU10890311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0cb14fcc046552046c9535dfc3008423b7426044f9016034a894daff033df2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MYSU10891074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b9d9f12b833a03771779ded18e61809bfcc2cc990c8b89835c8b8b71bfc216. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/MYSU10890092.
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