Stefano Giuseppe Arne Vecchia Holmquist (born 23 January 1995) is a Swedish professional footballer who plays as a second striker or left-winger for Malmö FF in Allsvenskan. Personal life Vecchia was
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 0xcf657672b58a442ead7840efe23fb8c2eed76d9d0c65c9fba1f22aafcfbf8abf. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72382b0c-702d-46f5-b94b-138b321e735b.json and https://artists.proofprofile.net/proofs/artist/72382b0c-702d-46f5-b94b-138b321e735b.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 0x7a08dc6038497f81b8e8c1249ea550375e7d8b445404d8cb7d941d30653f5bde. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/NL1AP2069591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4cc0f173cfded96d012a946fd02e2aa21d1886750a4a4242a0965c69420a48. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL4NL2003375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7769a0fa3eca7b49b39e2d265393287e27c0d0e4349fe12b2f39faca3d9b213e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NL4NL2118596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45c6a6de1789a47d08199acf7192845173addfe611ec4894bc92f5f327cb826. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/SE6XW2135805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45c6a6de1789a47d08199acf7192845173addfe611ec4894bc92f5f327cb826. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/SE6XW2135805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1dd5a3408e9d159bafd16eb014a5649eca19d05cab5a75a40b40367bef2a4d. 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/SE5752243261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc680b9593c730a259876d808cfc9293a2379c87b65474a969e67a358c29a6c83. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NL1AP2035478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaeb135d9876be3ef076ac687dc959c37054912ed13892e453d1c038442af2f8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6XY2324681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b86a44894a2a087b2bac801c9390c1f0481343dfd8c421529dc5e4b64d3607d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE6XX2374828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90718b1f82c05e1526f20ed05b94f3c49b9f517eaa00cf6bdc041d0d9937b147. 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/SE6HN2491749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a910bf8f485badfa49d5cbd3f5a25f12b6d7b7254e0bbd965c717659e3cd25. 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/QZWFF2563081.