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 0x8e4c6de8e7e85b1fecf34db73fb3a66fca95278368f6109ac0c2fcb9ad5d0961. 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/701e844c-7861-4d43-9e6e-35f103bee517.json and https://artists.proofprofile.net/proofs/artist/701e844c-7861-4d43-9e6e-35f103bee517.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 0xe2bbda998ee3d8c4b9a6f773b0533ce1f961b49d5585f29ed7255ef838677fbc. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:07:14Z), 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/USMAC1200193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60093d32712cb4b6c0d79d271f84d2a9a41f8d53b83bdbb5eaa099a98ab4fc1. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USMAC1200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbb5ab725f8704462256d9647a9bc2f7639a0c6a4a32e6bd80dc0bd586b6c86. 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/USMAC1200197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868e55a38f5681b061bb1928230e3b8fd2cdddaf991028aa64bc824edb6164cf. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USMAC1200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995ee1cd7f80348d01d7ed4801386e2994c738e5d5a4d881b736e216e4b1b59f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USMAC1200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbcf9ccb1f4bdbe31f07ef751c60ac803acaa60ff497f41877bdf5afbe06646. 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/QMAAK1861536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760022e24adb769e553a676f2475e85984f50758748c5e224948bb26021e5bd2. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QMAAK1861538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6df5aab75bf67bce136c00a9a6c3231060e665de16e851b596f2e815b27a7d7. 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/QMAAK1861539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caa3a3b90e24dd9b3060bb9f2ab69928b08773f225b2bfa83031ee05c8f8171. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QMAAK1861540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ac3060a3fa23e743daec71e63cb274453fcb236a279dbbf7b9fba74709426a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:58:40Z), 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/QMAAK1861542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bacb6ad76eca2130aaf3edc9d7cb1957d6eae87390467a4b3be0325eb5c5871. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:18:54Z), 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/QM9A92091478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2881ac0a8dd989bb727e707dba836779b5fd1fa9dcc025c2f8179e7b603b182e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM9A92091479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e26ff4483c04c04fb13fcb96f7204a622332b8b3e8d078a8c83dc0b0d473b2. 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/QM9A92091480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3fd9cfd224cd65a929c855e86184684158dbb4aa9102a5860f1402a95bd99e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QM9A92091481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de681e8381c440b3635ae143d1a08e4b526f5eeff5ec74f94beeba2a7a054a4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QM9A92091482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74c601d12812330a43e08ef98e6758d753a07bbd236ef333fcf352acd1afb87. 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/QM9A92091483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f824f864e3eea31f7b703c9f8c5c8b19fd362734e4355c511433a4a7630c5b3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJE2434760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9012dcbc73693ee75a33e554c6d5215c1113bc2ce2a7a49e9ae3a7338be339f. 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/TCAJX2524011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf679414a66008747c5b0fa9351735a624ebd92006eaee801e77cf54b4ec8e36. 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/QT65X2526634.