Paulo Sérgio is a Portuguese given name. It may refer to: Given names Paulo Sérgio (footballer, born 1954), Brazilian footballer Paulo Sérgio (footballer, born 1968), Portuguese footballer and coach
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 0x378ac95cea2f8360ef202b4cd2d46df5decff6b0d70d1451227fa487225b0313. 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/b2148d68-4809-4165-92d4-b790be3870e2.json and https://artists.proofprofile.net/proofs/artist/b2148d68-4809-4165-92d4-b790be3870e2.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 0xe15cb4e56923fc53239343bd27e205a7e9099da9b50751e2810a68b5c454c551. 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/BR4TF2100134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4ed2ea3a2f53d39b207340af310fbbf4c07df4c9be82c4a9ce315faf04ee41. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BR4TF2100453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abafe74befa46880242c9ed83ab36cc6a48cb07a5fd82affb04996ae00fa521. 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/BR4TF2200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500a1e4e24d39e73e24ee8c7f01b6b2e1478417934aa2a6683f50122d2b44a23. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX44O2200256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9f64a48c5a03f745f1f12750924ecd78b034c1fed78cfab433ada28b978c49. 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/BX44O2201089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7896f2e87612c39fcd7f1faae6009bda2ee367aaa932e1dc94f2ac5c4c987137. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX44O2200518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191d64c419fe1f871847ad86c9066f2c16efb1001399dcd306ae9b0373c8fb46. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BX4402202016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e351939f3d216728cfe8d72bb0c399194afd72bfcc8ca9bbcdd5c3210aa4b0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX44O2301569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b28c92300515aadc513e0a77872055a8d1dadcf71eb5dc3c352a66f8c418d6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/BX44O2403920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1298209afd363d9ca14b7ad3a09a27bdd6503f3ffab5f1bcec42695df918f0. 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/BX44O2404741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd004ed7dccfe158f5b6d10d14beda612316df03cd756544ff9a43bb8f69e99a6. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:00:00Z), 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/BX44O2500736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ff9e05a0c7f057f2ae92618ab1710d927431e0e5256ea66a22e0cfb044f386. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BX44O2500734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b549681641a6165b4d1d88a7d4648d8c4d1b1ae54b5d33c9c246123ac4109e4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX44O2202197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5778ebf9b5137f576294c6c9507c4ad719b30c842998ea0d5d0f1431623fa60. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BR4TF2200154.