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 0x659c27a79a38f2f09604c05c955495f23af55722f3edd4b3a0c509988fe22300. 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/9e0d30f4-4c94-4979-98f3-8cc649a6bb82.json and https://artists.proofprofile.net/proofs/artist/9e0d30f4-4c94-4979-98f3-8cc649a6bb82.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 0xe9e2ef2f3c7b8c3bd7feaff611bba821746467b208d8e546e30ad8a02e105a1a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6N2015222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60c78511ac8764372622e8d6c8862c3bff0fae947e148fc3e48bc3eb22b3e78. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:05:35Z), 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/QZFYW2151857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca47d1c078c504d3894f930eebb0018e6f735830c65789cdfd191a956eb5da09. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:28:51Z), 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/QZHNA2137538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7702d543fd5e5f95b0e4c1af6af49e81c0d487d8494dccd1482547f23fb00b29. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:02:31Z), 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/FRX452194162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9865bb546b9bd2277628801e3218fd1ce2a10b6374fc20c48782565ef44c7c99. 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/QZHN82234241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bff53dc8475cfd978795ee0fb8213f046f3a88f9bb7d387c72e5a716ac07b0. 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/FRX452277842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccb23cd92f897d03ab91b599ff05414da2bbac88824324556aa88759ed05404. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/SE62M2227857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb83dc97911830f96860a3b19a5a4bbff3b7b4efec65fbe704c62b5cab60c393. 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/SE62M2227859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c44a424e88248cae6a16fd88e68bd0ec93ec25181ecc0094c556d445bdaf0e7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SE62M2227862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf755ce9f9b1b4178bb863268d9e855a277e23fbc6c8963a537022236eac464f6. 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/SE62M2227860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30538baaab8245a9f2d7878533053d5e0584fe65486b1804afcb84a5a3254c49. 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/SE6SA2353446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a8591aff98211b5ef28995c28313e8d771ecbff0756c482d60910491afb8a1. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TRUM72300617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c1411c5ec31db752b1e9237b60cad1a75627e922e70085a7ffa46fd7fa8d36. 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/TRUM72300731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904eb3dd708721f3306189976ecf4ba9afb11bcacf6bf97ff634280b8b24ccae. 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/TRUM72400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0169809412225da6b835eb1c60bd8a798bfc634366507763e9ff89e220c3411. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6P2363549.