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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fad299b20fb5149f07120dc84195e4d03ab2f26fb0fc9ca8fb88886c05e967c. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9204fe9-eba8-4188-ac32-53d757d1e4da.json and https://artists.proofprofile.net/proofs/artist/a9204fe9-eba8-4188-ac32-53d757d1e4da.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31edb8c35045f9ced9bb2e05d5780fc80b3c54854ffcb5ade2093a2da3e9eac0. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/KRB921715211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160dc4882c4c94d355bf571e10ae07e66205ad5fec63695b34e0bcfdc8619258. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/KRB921715212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05e8dd7a739488b7078a10275e22410d2bdacb05e35c3063e1f1342c9bcdc64. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/KRB921715213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da66145916dee145a83e07c6b372fc0182a4390582df141373073680e82531a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/KRB921715214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cd01f9253500c510dd359af7f5d3f27b82a5543ae19aeff99da595aa884887. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/KRB921715215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba6d3aee23287b720dcc01c43e94311b6158fd13c464c3e76e6ce34c5b48559. 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/KRB921715216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6865027cdfac3a30e51a1d5eb216295651ebf8ff0696ce84c4fb303a14fc11. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/KRB921715217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3514634e66d91f53d6f672f3412ec0a8f880b152d4e2ed76848d5d837da411a. 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/KRB921715218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d779a37ef349c369e26f33ac8526a62dfb60cf3a20af8d05e4f5371d59fa7b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/KRB921715219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd82efd2af7910a281493b94082af7c97dff6854c9e28cedcef29d3ee90351d. 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/KRB921715220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd027d5b21de865eeb55789983d5658fe20eb522e9a6593b126fc0650f5e10ba. 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/KRB921715221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766520df658a5f447a2a3c84ac6f1ddd8c9309ee57c59b0d00758e71bae60a57. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/KRB921715222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f39ce650ca1ee5a80879abe0d1298fe5503441f4b2889ebbc157bb6ea782fe1. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/KRB921717262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdbf942032d0b1855a671d5a5d69b775d2f4f7cb385781f971a8868333eff83. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/KRB921717263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf177e7bc7bacd80b0a4893fde211ddce5214e31f42e96911908c263ed7a8071. 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/KRB921717264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1b18229fc09f40c52d8d9bb71cb261cea170cc127d41b9a9981febffb032e6. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/KRB921717272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8204444017938e7b3b0a1159e8d63c2172f15b728695dcc7badd7845fa72640d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/KRB921717273.