Grupo de Fados da Faculdade de Engenharia da Universidade do Porto
{"copyright_id":"0x3635a87d21a8d2b8970d3f9f65e2666ba1e20fd6d2afdc62af4a6ca5108c74e9","name":"Grupo de Fados da Faculdade de Engenharia da Universidade do Porto","registered_at":"2026-06-17T18:53:44Z","symbol":"NIM1487460","token_address":"0x490eca9e5adc0f34911b3f185c5c027f94115a54","type":"artist","uuid":"98aae2a4-db26-42d0-b3eb-b3693e5e0111"}
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 0x3635a87d21a8d2b8970d3f9f65e2666ba1e20fd6d2afdc62af4a6ca5108c74e9. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98aae2a4-db26-42d0-b3eb-b3693e5e0111.json and https://artists.proofprofile.net/proofs/artist/98aae2a4-db26-42d0-b3eb-b3693e5e0111.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 0x1373f7c3187a13b9292f09d7145f0213953d415a6d385918374608cb56671d87. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USDHM0807772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ab19d9c88d046c9f7d7abb720a27eec2287cbe2f4cf945e0806e107b4e8aa9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USDHM0807781.
35 Anos de Tradições Que Unem Gerações (Ao Vivo)