Mattia Barbieri (born 29 April 2002), known professionally as Rondodasosa, is an Italian rapper, singer, and songwriter. Born in San Siro, Milan, he began his musical career in 2020, releasing his deb
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 0x8f415d88fbd19cb60ccd4731bd41119a1e59b1db34a0b4b36ba334bba67361f8. 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/2c43890b-c18b-43af-aaaf-fc18ca790761.json and https://artists.proofprofile.net/proofs/artist/2c43890b-c18b-43af-aaaf-fc18ca790761.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Eurovision (feat. Rondodasosa, Baby Gang, A2 Anti, Morad, Beny Jr, Ashe 22 & Freeze corleone)
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 0x40960a693ee389e73be2f7eddc06b02a972064ed7df6355800c2d3e74d7e1105. 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/ZZOPM2118748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803bb0887c77bc9afbde6ceaef8a213e538431265518f0593d7a5621c991eafb. 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/ZZOPM2118745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8ccd95b2706281779b2ca921a3bdb4719021d32145e768efe26dc9d6218b83. 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/ZZOPM2118744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9bd08cf67c8fbb08cb09b7f5323b64a39d1316c7047a6c5650619d2436a6f5. 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/ZZOPM2118749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5042509aa95a0d4e19bf76c265715223d0d95da0369557848caadb2f519fc5cb. 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/ZZOPM2116000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050d2926722d224d0a4240ebe418ac2f0f3efe1a67887df6b7f06056016fb6d2. 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/ZZOPM2110165.
Body (Remix) [feat. Capo Plaza & Rondodasosa]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cee0a2caefc083855de5b57fec0335e887dd63437b24b1d52f3a059dd961a5c. 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/GBAHS2100283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87199ab6fa741d94b785700efe57813dce12256616ab8fa2037fa25b3a976751. 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/ITGGO2100002.
Dancer (feat. Noizy, Rondodasosa & Capo Plaza)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5113c1467101b7e22f589aa20cab0ab178dbb4730947b5efb2ad9aeb74f61061. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBARL2202501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5113c1467101b7e22f589aa20cab0ab178dbb4730947b5efb2ad9aeb74f61061. 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/GBARL2202501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62749635ab5f11792adb35dc30f37e1e231572b6f20f54170978de3d5d44bdaa. 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/ITUM72200910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb8edfd5fb049502cdd3fb52791fcceefafa23fb56aa296445e705ea6e8c97c. 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/ITGGO2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380644cc15ba4c03b904c59f33b8e00e1135d0efb5d5c9110b647a219e4a3856. 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/ITUM72300660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380644cc15ba4c03b904c59f33b8e00e1135d0efb5d5c9110b647a219e4a3856. 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/ITUM72300660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b84a3d2e596ab60aabd88dcb8d11178eed2703761fd1bac2ea77251e3d075b. 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/IT4U12300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6134b9a1fa31e83f8483883855dd755f28c4368754ebe029e5c3a9fa66261f77. 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/ITGGO2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc268bb621e06d01aa1cceda8d8b50e73fb2765e210feda4000e2e497dbfae797. 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/ITC6Q2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f3d8a0d736bca6178c61557211446402e50a23cde5f1f1078f9df4d1d1f77c. 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/ITGGO2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba8a4d03d84fcc680881478d87c32049de7653fa9234bcd965b7ca813397c7d. 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/ITGGO2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c8b0fa2fd5bd142af88b3a870869addf9812be2ecc89ea4d72c8f02473aeb8. 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/US39N2302991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b666260930f028ccc718d4b5e24fc9f1431a54484a77995b1ab3ca26804659. 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/TCAER2013557.