João Afonso may refer to João Afonso (singer) (born 1965, :pt:João Afonso), Mozambican-born Portuguese singer João Afonso (footballer, born 1982) Portuguese footballer for Belenenses João Afonso (foot
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 0xadd3eea72f169a7ee4b7baf0355c4e41dfd27d5cc9b98ed18d7874fc33217bd5. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91d43215-3317-4a22-b2ad-d8bb62d01fbb.json and https://artists.proofprofile.net/proofs/artist/91d43215-3317-4a22-b2ad-d8bb62d01fbb.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 0x73990d828ec3375bb4feb4c2fe8d90a6d7715eda649c9d284c6a20ecae224374. 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/PTAE19701360.
Sangue Bom (Canta Mia Couto e Agualusa / Deluxe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a48df47e13fb00b6ffade467ebd62c2fca4b67e357ed4ea426a826551eb34a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:48:08Z), 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/ES7731204008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb9dc9d9905d3503fb3e5a4246b223fab6f2bfc3ae59381c610e1054a7e20fd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PTCN10100002.
Barco Lindo da Canção (feat. João Afonso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ad43f79cfd04729058858e53e5a80231894d958a63010fed86d8641944a5dd. 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/PT0IP1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19fade46fea54a34286b363aaf4a4d196f819f1d823d7be522109b6a64e2130. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PT9BY1800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079876b193dfdb146124d1ded52881b2fe33f98c34b0dc0e88bad86de984193e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PT9BY1800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc34945b4c12af6f833f9831f732c2f4f6e6cbdfb92fce18cca71a97b2fcf1e8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/PT9BY1800050.
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