Francisco José Rodrigues da Costa (born 1 December 1974), known as Costinha (), is a Portuguese former professional footballer who played as a defensive midfielder. He was also a manager. Best known
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87baf7790e4a6a0cf0e086e7dcff2d15be31196d1cf9eb16f348ae8566b6f67b. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/668650ea-6f8b-4e1b-ba62-ee5b35880f58.json and https://artists.proofprofile.net/proofs/artist/668650ea-6f8b-4e1b-ba62-ee5b35880f58.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f708d8d73662773bc657f5179c7e73f7500c05ad22a8fa3a1162ce550a09538. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US7VG1327307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cdce1c566e0d3f8f5bab5b36078590823fa63eb091907bc446ca3c2c62ed11. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/US7VG1327308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f8803ccd72d295f954784803c573caad4ed8e0cb377d0e16be81871a5ecf0d. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/US7VG1327309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7446e20df9a3425cf32a9c578507297d57bad3dec1af3d79566a2442c4cf2bb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US7VG1327310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe525366169183d63923c41a5e03d2cc875835418b571145d393af511e1226cef. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US7VG1327311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727f74fd9402cd0e7b57eec1e62d22747e22b19081f383f2d661cc1c3b61b02d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US7VG1327313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974f6fb0dabf17e28a42f4a1873d06f60f0c08107d4023d1a55ac1c62837d94b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US7VG1327314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6510642c559a4583329bd6bd0bb15e1ee6968de916fe4fdbd723015953b3cb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US7VG1328168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867b8e328d75bcf62894602386f6bf848a1dcf576b1181169bd1b9712d8cc7d5. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/US7VG1328169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a43948024d8f870d0e3862c0e13c9a23e90070e3209810a8a5f09257b3642b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US7VG1328174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b71b3f8b570c352bb41f11ada5c194f9a0c8ec337a80a2c072e2559926e70b. 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/US7VG1328179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a9de14dae167402aa3394bad520344abda341d212dbcc792cf20263e04fd97. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US7VG1328180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778d88b9be8d341d276c21fa578ee3480fc9350ae6054862a252776f116bea6e. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/US7VG1328188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab0cd8196983b4879e48f6d9f0e08b4252bd78ff872d932490f48fe48e1ee08. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US7VG1328190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5561858782aae52d3e80dc394ae1dff505ccb326e0d46ab6c5452ac46313c95a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6MZ1497669.