Luca Marzano (born 23 October 2000), known professionally as Aka 7even, is an Italian singer-songwriter. Life and career In 2020, he took part at the 20th edition of the Italian talent show Amici d
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 0x9821ef7e8435ae79329c24f7b3ddf851135c8d3a7eabfee2459a53f0da8db452. 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/a4a89ddf-bc98-433a-b5ba-49be3c36c933.json and https://artists.proofprofile.net/proofs/artist/a4a89ddf-bc98-433a-b5ba-49be3c36c933.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 0x95155016eaa4d81054747977abcf862a5fb57406139f61827774480642dc168f. 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/IT4UW1900081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf929d6df226cfd07c59dd7b112922501a0db1398d15674b5a4eae70347b5d227. 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/IT4UW2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429eb3c9b9da4d5309640ce89ec4bf76e73fe9d8da2b5c5e87c56a5f4f262994. 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/ITB002100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e0fdf3422ba04b59ece86064e4426ffe4808ec9a0f07876ee8a5e875be65b3. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:27:26Z), 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/ITB002100305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24862b3dbb961e07259d5238367132685c13064ec1ec9533266c5d30e394f0e7. 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/ITB002100308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458f71b544a8789084d9407cf95d229b884cfd09049a41491845464f6c580e54. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:41:27Z), 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/ITB002100306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f81664d0d66b100b3c73345b328c147dfdb15e4b91dfe56be1fdff8e78f1bf7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:23:03Z), 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/ITB002100310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62f9b9ae8799dbda5a0e76344d9cea354bdf97b03c94d0801ea929151afedf8. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ITB002100309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced0d0d03e6968718d6471063bccc587766c9dc87593a5fdaccdde902ef25998. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:58:39Z), 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/ITB002100303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b88318855277cfb041d41889fd82c69eb3b6491cc0c702061691091e2c99890. 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/ITB002100304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56b6b82781a832e82c2a62240240258fbbcff5c70f70bcec7978ded5912752c. 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/ITB002100598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92a15aa440641d2054c9df00ca64db3170666cb398644c95fd22adcbee8c983. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:09:29Z), 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/ITB002200743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3730fffddd62f0dfb20792ec6fc033ec132c11f18188628c332677893761d3db. 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/ITB002200441.