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 0xadfceb00a1efe50a8ac851abff321ce289f653c55f47f7b892672d30306d7ae7. 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/4ec7c952-00d3-4d33-8c2a-d0eeb3c74c7b.json and https://artists.proofprofile.net/proofs/artist/4ec7c952-00d3-4d33-8c2a-d0eeb3c74c7b.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 0x576a10640975c5cdcc4590d32634feb543718b1ab73af49984c80d9bf9802da6. 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/UKXN22095650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bdb506341b3edc6ea2a7803c5be1b793c6ed0a827e7da5a2901b7ed156009e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX3Q92196120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1bacb1482022342af949442ddd970cbefc23f32821f6272daa9822703116be. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/GX3Q92319941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33e276a222e43da3b65f79b7e40fb99fe1da3c827970623f9bcc4c3c1855200. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/GX3Q92388715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaff51994d147bcf0f7ae44df7102f6f081afe8ae45919afed812489982ad8e8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GX3Q92388716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0217ac5dd4e21ffad3754c32e3d2b04b21cf70b71679d2c92634ef31b8a48508. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GX3Q92388718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9151462641517f88f6ae9dc5aa88a86041d785e15946fc84cdcbeaf9849dfa47. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/UKXN22452498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab84f4e369e5a3e297078f2ae2170c96f97a1301b1587f08f75f588b87a45da3. 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/GBMA22425442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6b20052a54d4c1fcebf2d027ffcbf9d4bd8625540054b6d272df256343588a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GX53U2496038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6b20052a54d4c1fcebf2d027ffcbf9d4bd8625540054b6d272df256343588a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GX53U2496038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04b8a05342c8245c867b9eafa8ebbb501896ddc9d4c4b76fc9354784e82131b. 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/GBMA22493768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e6ad20760b34896017ec03ab397b17ad8f1587c8a59766e0a69d2f516439ca. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GBLFP2439526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8fd2b7a143e860bb907ee9a5b53142bbce52f88721a797b3b80666da250fa1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:06:24Z), 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/GX3Q92141576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab84f4e369e5a3e297078f2ae2170c96f97a1301b1587f08f75f588b87a45da3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBMA22425442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8644132f08677b7a2d9281cdc23de77cfacef316156b45ce276a2aaff24d9aa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GX53U2323783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05167576ed31b663e10a7e0d1cac9c88bd6a33bbcf6f8dc5ec0e8b3db480df9f. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GXF9Q2579641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cc063d72c7aa32dbd0ff08a09641684bb928bf497bad2c8dbbb21a6c2b89ea. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US6QR2400124.