Agencia EFE, S.A. () is a Spanish international news agency, the major Spanish-language multimedia news agency and the world's fourth largest wire service after the Associated Press, Reuters, and Agen
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 0x0f817a8e668a2270c809dbd00f676622949f9aac75cba7c336cad25e8c28142f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c1ff95e-638e-49e9-ba03-4309024fbb45.json and https://artists.proofprofile.net/proofs/artist/8c1ff95e-638e-49e9-ba03-4309024fbb45.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 0xf3564223f4724d0ccc5b87f5efbea5d4e34ed2583f9a9fb4c55f2a629af52440. 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/TR7911100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191ef2f2d6befc75e6cf48cb8d9ec04feaf7ad57d38ba032a4490974c844b2ad. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:19:12Z), 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/TR7911100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7597403bfcf88a45ce72f4ae30f245cd83f7faab9f1fc8e9d9aa9438abacdaf6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:36:26Z), 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/TR7911100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2032f198b31a5e5664f18747d5381ffd96dd77a3bb9369cbfbf3d14c7b661d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TR7911100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a1faf641f894873b1ec332e1f25aff94fa77edb6ded5e88c5e4c864a1c84d0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TR7911100063.