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 0xa5c3e617952d2443e74e1ae2e94b09140cb95af7518b5794d25ce38f6546a81c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4253571-9828-4307-adf2-dcf377bcca85.json and https://artists.proofprofile.net/proofs/artist/d4253571-9828-4307-adf2-dcf377bcca85.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 0xc88e1de85771e8dfb82c5ec4af8d93142240e0f9a7a1e3984ef321aa682d9bbb. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:49:06Z), 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/USJ3V0680679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc39834e9a60f2935b2d77a5bc618c302f60ec6f6b4091269a717c9218643807. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USJ3V1037420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d159612585ce8bedfd62e65bc610f1eca0462c0217015c8557570434140374. 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/USJ3V1037419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254c4927319a38e05f284923ab5b122c9fcf7ee659067898dc9b1cdc71b495ea. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAAT1040500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112adc38c8e8817812b2864fef696311045e7762bcfde200f3dfd833c0acf07d. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCABE1285686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae5bb10192ca581c864c455069a58a2c377d2c5d51166ff2abc2a4e4ad9e7ab. 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/TCAGN2228795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda49a032a6b788f25768492425d9057ec40da68166835f7a048039e89b867eeb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAGN2228844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2fc49e150771cc80df5972a55ca2f5fdaca0a6583210d1c28a6d5990e2e9cb. 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/TCAGN2228884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae5c42471335f10693f7985e507525b60fc44b3f19e78fa8491eac73a916457. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCAGN2228902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103b97c89d832438c2795664d8da0738eee3b8bde5980a84878d64930f38248d. 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/TCAGN2228912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68104fb1503879403b74767796d1143973559ae22f9f785899ddf266c8875756. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAGN2230123.