Nathan Santos de Araújo (born 5 September 2001), known as Nathan Santos or just Nathan, is a Brazilian professional footballer who plays as a right-back for Sport Recife, on loan from Santos. Career
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 0x6edf67a47d9c7b1dcaf87a31d6b9f05a62ddafdf96f9d571af1e8b3dd2c2a47b. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17e773ca-0f1b-4c5d-97ec-9843300b529b.json and https://artists.proofprofile.net/proofs/artist/17e773ca-0f1b-4c5d-97ec-9843300b529b.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 0xeee28f603a885f6fc94336114c17f077fc6230b4809184150d3f4e080aba0cbd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHZ42118428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa2e2f07d7074c08b2d94f29f235ffa2abc52029c09e2fca231e469c8fe6309. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZHZ42118430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be68da0fe9608862fcaddf221f2b4274d4f629f044f4a38f7441e2a47ee6c03. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHZ42118431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484dff2a84f7eb331d88a23635cd0d1376495c006c323f79a65b47e995d19847. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHZ42118433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff2cb63f154940f39eb24173fd3ec3f565a73e8166508eaa64e21ce3867ff72. 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/QZHZ42118434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ff11dfcf05f982fd8068cf4759aa7d233a9c95fbd8bcf0620f1e1e936b33d5. 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/QZHZ42118435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4124b4282b5edfcb820610077e244c9e4903e2f3a48398bb323d217c644d51f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZHZ42118436.