EFI may refer to: People Given name Efi Arazi (1937–2013), Israeli businessman and high-tech entrepreneur Efi Foufoula-Georgiou (born 1957), Greek-American environmental engineer Efi Oshaya (bor
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 0xa4c668ad4cb91bb9f490cd327637aba7932c7c8decdd197aecedd352c226c037. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b862cbb0-1c93-4c50-a09e-a7e061b45ec5.json and https://artists.proofprofile.net/proofs/artist/b862cbb0-1c93-4c50-a09e-a7e061b45ec5.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 0xb8d2f368d6d30feb5ffb9943fad37918c5e27db4e7642cb8e5b76b9128137a4d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/PLA552300583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412aa172dfcdd536e72fdb7d82c9649edfc15cb52a915718f8e8d6257f77262f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:07Z), 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/PLA552400062.
Good Enough for You / Taka, jak z twych snów
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e65118fa76bd8ca3cf220566c0edc16cca1b0e7810551f1248d8359baa6a91. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:52:44Z), 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/PLA552400317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314ab6229e606e58c8c2fa6d7b359f52a3078a2252b237da5cd11fcc0dd894a5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/PLA552400574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f5a9c7ab00853c0bac96eeb853f2e20066a6682bb0d9d13b13566b42f19747. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PLA552400767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed5e18d179ea0975caf76aefb07822e6a6251d709496866f739bed6fefa9b96. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:04:02Z), 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/PLA552401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306956b18a80c24cea8ed26115f9058dc5db3994173f33ded88fa1a8a57cff2a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLA552401155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbe5c4963f14c726e4903b8793177843013a500e62b352dd0b8c7f3200d49b5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLA552500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c98d5ef35cd7bbaf51be52781b94468ad7a8651625f88085986b3806fb373ad. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLA552500433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76a7e9ff627840d0b8ad81f3638998a879a35e42be56624309d9ef335a4906c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/PLA552500577.