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 0x0de892fc28a3ba501826a40866759bdafda999013b3a05e5f0531a327cba1798. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccb5adf5-11e5-4f6b-b69b-94898fb1fa0c.json and https://artists.proofprofile.net/proofs/artist/ccb5adf5-11e5-4f6b-b69b-94898fb1fa0c.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 0x16ccf535e33aa4402ac72fa482d2048024af2f7262d890c28bb20c26c696029b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHZ62125664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a48dc4825b1b6dea7cc0cfe2b169716db473b4601b230ae04d9fd8a7a66f0b9. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZHZ62125665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636a13c485b8b899470a4a9485bb2d961afbbe9ab03046e880419ba21a3c779e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHZ62125667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e25efc065bb999386dc065701843cf79e55bbc855cec10aad8c1033331bd1ae. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHZ62125669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0934bd0f919364d417bec2396b0c85df5c42ccf45722ccfc2c73c3965fb014ca. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHZ62125670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa191d002cacbeff6c8c6bdb4687734178b488654952a4b656c0c4bcd3b08cf. 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/QZHZ62125673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdf9e2d6d3e70d9f98e701095277b1ccc3c442afd415f72d700ebc75c344b28. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZGLS2229164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe03fa5bb7d65ae46fc98d2dd6c3e1939228102fcf908d1c049ec2cffcc6911. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZGLS2229177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742ff79bc8b82f0e95c89974893210ee4409360f518a0285181808661568068e. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZGLS2229165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954c36d1dc4ac0199a02202ff3de70792763d7b1cd2d05a1fd8c61c0090fc843. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZGLS2229166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf61736aefc67deeee1fe842c3db080dbfdd4818da804bd2e73125bc78e4b107. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZGLS2229167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f89b27e5e53dbbbbc52d4388272dea4ddd71a2e3ac58de19a5397028ae9d36. 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/QZTVM2209055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c862173dd2b4ee746440555d96209c60e920925e6f93128d4216379244b2f4b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTVM2209060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6174bee74e58f440dd35fb5b105a4b6d9ca9f775c5ed09353ee9de1105248bd4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTVM2209061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a128e54c9aefb1ee91eb01b168be5a2a75f3a609711ccd1214baba52e587318. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:43:56Z), 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/QZTVM2209064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ce53b1c26d171b9d3c6a022c66771707abc34dc173fa7266a9fc8c0bca918e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTVM2209075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccb02e78b3d4ff8d78ae81781325c82de7ab371363c12fb7dddd82968f1ed06. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTVM2209102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2ba28c56110fdefd27d0052bc1913453d9c977ac969db34d16f6ef49ab3718. 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/QZTVM2209225.