thumb|right|350px|Injector typically used in steam locomotives thumb|right|400px|A- Steam from boiler, B- Needle valve, C- Needle valve handle, D- Steam and water combine, E- Water feed, F- Combining
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 0x53fd64ed8a2ae42c542e69012b46f8cdce13f3e286daf6be291885695e0db6e3. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66168bba-bb98-431c-9624-5a39b4de76a7.json and https://artists.proofprofile.net/proofs/artist/66168bba-bb98-431c-9624-5a39b4de76a7.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 0xc2f2f0f68f9f976e9d8d9bd390a7f22e025987b2c6af92f675f96f05aa794268. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DGA0L2409580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56eedcc6a8e212cb6a8eb2a67512e3853bc1bd321ad35c61db6663189202f4f7. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DGA0L2409581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2df3206fde59cbbf3eb746d93b2c2c565ed77a6fe77526e7ea8486e86c1829. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:53:03Z), 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/DGA0L2409582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e3ccbe75c8bb84aa3669ce119ca5af8c78deb81d880a59609b979bc5ae24c7. 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/DGA0L2409583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cca31845507aead61e7857fc757bafa5066184490dd58d7846cb552cc6d45f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DGA0L2409584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea35210cc1f66bb88a9b239ebe71513b3d16c9cc271405ecd9c5c8db918db24. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:41:00Z), 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/DGA0L2409586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063bebbfa42f166606d8972ce2d39859a1d049a8b3e655fbbc1d031b4cdf150e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:51:13Z), 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/DGA0L2409587.