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 0xdf28df18eb8bd319ffd6c73ea9c1a8cf01c944d93984a590a20b9f93c0ff5dbd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea9f6836-68d0-47c1-927b-f67ee597666f.json and https://artists.proofprofile.net/proofs/artist/ea9f6836-68d0-47c1-927b-f67ee597666f.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 0xc0aef6468079a7c8ddfb509533104a7c0c621af0cf4944a475a139748bf15ee4. 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/FR6V80289055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfa020390b983f3db4934306f9790042e818b5979de871f03f0e185d1479b4b. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:51:39Z), 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/FR6V80289056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a0f0e45bad0589a046eb83e4740e4d406afcd3f81164d48474cdd1855261e6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:20:49Z), 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/FR6V80289062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3595882324da522515a3cc90fd4de71c9ed943f6af6a69d9c4616c5a135123e2. 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/FR9W11713978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee662f0cdec266b9f3ccb201ad87698fefc3f847519f1d3aae4380559d9066b. 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/FR9W12117156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed0a11bcb6b2d8de086df982d265565c3cb799f94c5c667e9d8237ee8c9acd2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:05Z), 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/FR9W12117157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe490db5f1c311f876d6cd7ff7fbae4a18e2d1a2c680e13c850529a9e7ed57096. 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/FR9W12117158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418abb74538fd9e252aa3e93eca61d2d10539deecfba23647952bc8ad57fd6e2. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FR9W12117159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58c8a2b1ec1659d86729cca00c4246dc9aac5c40b112b5e8f3ab8d5536bad6c. 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/FR9NF2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdba36c82bbbdea8c36cef9a1f80fee618d34ac107ce65cecda3b6eb6d55a52f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FR9NF2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb381d581f24ad7846f9b9d8f56077d96bc2878813d9501e112e2a03dbaa9230e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:49:36Z), 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/FR9NF2300060.