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 0xd7c31fcb9084ca69183b9de4c867ce86322402734a24c64c111d88e6272f3e45. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/394a42fc-1ddb-4d1b-a90e-df584af5ed33.json and https://artists.proofprofile.net/proofs/artist/394a42fc-1ddb-4d1b-a90e-df584af5ed33.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 0xbfa78618548ee4b66a1e7401f04fb232b4a1bf36488fcdb47d72f7e4e99cf56e. 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/FR2X41642901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9119636df5af8d9a83fc90cbd503032e705f9354adcae99a3f340b443d03f2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR2X41642902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63502937be7b2199160db03c52f8eaaf34a0e31c34429d817ac6265b47a01286. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:03:14Z), 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/FR2X41642905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a270fad78fd9af33aa8dac6c5e11e5e38dcc9144a30d3394e59317e97c567b3. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR2X41642906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5348bbe47ff715e742710c154b11ab96866ec58bd99a4ea3c4d1b4766852edf7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2X41642907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b69c077668cab88a0808cccac69379315cd0effde79ea991ef16537bfc0489e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:19:44Z), 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/FR2X41642910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc253562b72d98a6c062c970f3f3eee34a7783479471e4306dd71aa97cab2f707. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/FR10S1901189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a8fc81fc425589198043712a0a9d298d34fa43302d76460c605d958658dd36. 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/FR59R2356911.