Marchi is an Italian surname. According to one source, Marchi is a Spanish cognate of the English Mark, as derived from St. Mark the Evangelist. Notable people with this surname include: Alessandro
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 0xfaf2b7b3c8396f925acc40f8f65fa3259c1aebb393523c131e860056923b8d9f. 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/396660af-a141-42fe-97c3-265516285e4b.json and https://artists.proofprofile.net/proofs/artist/396660af-a141-42fe-97c3-265516285e4b.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 0x409c2b3283b6db1bdd9d779b9e8cb293ff2b8524e6b98920aaf975f56e10bfbe. 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/BXKG22301512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8564b6b42d77695c86281792ff2106438b37e6851d08518898486ad741eb55e5. 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/BXKG22302013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f29bb7b24721f3236ff5862a3e2574182b0f9d059a46f19c910c18b41986efc. 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/BXKG22302344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa58e294bdc134890b9ae7672e2709236a472cfd91fc2fb354fa8bec7a15d2b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXKG22400985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a4dc7b91b5002bc542ef6bcb8aa304f86726351200493eac7383f18aa88cb6. 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/BXKG22400986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b86bfffc2fc87508d07cf42e39543758e5302e370c65ddad41e3c4c95f0c07e. 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/BXKG22400990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a699dc531d7cf2491f9044c6ebc53db0a3b62746862949a8ca51243759178f1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXKG22401929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606ab58d5f4656626f391aba210f0ad57868d17212eca275646caee3ec6d4f44. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BXKG22402201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5eb8fc998404fda870e8102cfac1971a68414d1dfc754d20347fbd9e75b24a. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/BXKG22402202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b42953e8a78367ffd9d34df963557ede3a37f7a804c2237b1435e69b5865de7. 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/BXKG22402203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10a4a244e60d77c59f8433b95c23b3d93a40a2efd29f2d29a0be4fbc2bb2a5d. 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/BXKG22402204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29887b63178af676feef3b1b8d2e515336dd040535b051d9be7ce9b25e3b5194. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BXKG22402205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afa1dd66000d2175e7b452a187c51ea764282d08341202e6f6b301f09b6c0a9. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BXKG22402206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d11b8241146c8b4b003a4a06c4bd2f462eabbd16142d5ce6a14223bfa24f789. 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/BXKG22402208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806ed59986906c564021ad95c3d6401cbb644cc40fd3060300adeaa4b625dee2. 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/BK7NM2500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa234949f39032083d274ba41d17c43b57540e977dfaf03fe2a28af0b1e75497d. 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/BK7NM2500251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b1398a97b30cd89a212c42057a6f1ba06baa01d712b6cd4650bf090f9275ea. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BK7NM2500323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c6bf12dd88a414044782b36b16e54e668f1e239df8ca8b60bc15acd5b9aaba. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BK7NM2500340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205cf4c0b9dc19a2df31b450dfecf82377814c22185e8c4e4408e564e48c4452. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BK7NM2500349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7b1168ea00a30bb196381178933593d72f5f703b96e1dad73f50158df53aa5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BKDFK2500230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc651070a1bee5b12353559660e3e0ad2d2392de07802620b59f64ddd8a7031. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/BKDFK2500304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ae91e25e61a2381669b05dc858efa100e69a3c60db810bca645feab9f8a0f7. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/BKDFK2500233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa491d7869f1a421a51a47c72e62644226629d5280799fa49f385803a67feea. 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/BXKG22400776.