thumb|upright|Hi-fi speakers are a key component of quality audio reproduction. High fidelity (hi-fi or, rarely, HiFi) is the high-quality reproduction of sound. It is popular with audiophiles and ho
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 0x093520c93e7d6e914449fa10179a7e34086a9a7b24ba86b5e6c1fa4ec6671f4f. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5211d82-f8da-48b8-9d4a-42d8ac875ce2.json and https://artists.proofprofile.net/proofs/artist/e5211d82-f8da-48b8-9d4a-42d8ac875ce2.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 0x6db02c2b1345a80c1d6313ec9c466952f42931394bc0ea4a4ce93870d145b339. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US37G1886403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd194bcc3d2615f563cfafc2b1c0755bb205a53d0d467646a92cbca4cbd60d13. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:32:37Z), 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/US37G2304101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7c17abd21a8515877bfaa902b1ec01ad717b655820c5bf24593e10792ccf40. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:57:09Z), 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/US37G2387907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05197b6e608322b32606edcb63ab7d472741059752d29a901113460c9a35d0ae. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:39:49Z), 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/US37G2387912.