Takagi & Ketra is an Italian musical duo consisting of producer Alessandro Merli (Takagi) and DJ Fabio Clemente (Ketra). The duo wrote and produced songs for various Italian artists, including Rocco
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266f81a65e03912d151cc6d1d39984ad6560fe1021b57276c90080428b38c5f8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ba0d78c-44be-4c60-94a7-2826ea089ffd.json and https://artists.proofprofile.net/proofs/artist/5ba0d78c-44be-4c60-94a7-2826ea089ffd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
L'esercito del selfie (feat. Lorenzo Fragola & Arisa)
Da sola / In the night (feat. Tommaso Paradiso e Elisa)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb1d52567b289581349813279c2fd944edcca9ecbce359aa1b9732ce642c8f9. 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/ITB001800309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7da350e684355d93a8dd5d58e3b4d1c54ab5975f538f7ff57eb240b23767a2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:36:00Z), 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/IT5081800068.
Amore e Capoeira (feat. Giusy Ferreri & Sean Kingston)
La Luna e la Gatta (feat. Tommaso Paradiso, Jovanotti, Calcutta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b7d280055eef455802b5eae269ee12c8790aee453323a150006d77dd998c93. 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/ITB001900269.
Ciclone (feat. Elodie, Mariah, Gipsy Kings, Nicolás Reyes, Tonino Baliardo)
Venere e Marte (feat. Marco Mengoni, Frah Quintale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56fa4a35825abd7d4db14fc00fec104b0b970871f79264d7cdd041bb6f23d6e. 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/ITB002200506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cf87264b4dd70f76dbf5dae51af46a34449a0dc9228512c48ab843352ed6df. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/ITB002200643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ad53f86a7c361dc89241ce4e7bbb8aa052dfeaade723853cdeed7e7f331c1c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ITB002200642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2c42ae91da0b5eb15d2d3de30f435322cf6102419360e0052d631aea12b9f4. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/ITB002200657.
Oroscopo (feat. Takagi & Ketra) - Ghost track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe017868d3a47c4d2655daa287d50e623d611c47c8de00448ebb19bf38d8f1da0. 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/ITM381600065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1925ed25acbd601d9080c14f71dd8df8e05911b5a91e24136e33d9a8aa1a7487. 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/ITB001800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a1289341a1a88d52c276cd51110e754eeba1101b92e1d5c94b2a9310c78f85. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ITB002000705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4652b212a0b2f930ae4fbb7507ba7392e386df74e591686cc597b1b89dd34a. 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/ITKE92300007.
Oroscopo (feat. Takagi & Ketra) [Ghost track]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b39a929cc196f7ca095250b4e7cbdb3ad7bd48ad6427d46dde796624e2ee2c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITUM72200379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb1d52567b289581349813279c2fd944edcca9ecbce359aa1b9732ce642c8f9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITB001800309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66003bd0bc2b0d579270cd6d234c75caac8b0b3419bd8e5582a84f0634c801c7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ITB001700401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b7d280055eef455802b5eae269ee12c8790aee453323a150006d77dd998c93. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITB001900269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66003bd0bc2b0d579270cd6d234c75caac8b0b3419bd8e5582a84f0634c801c7. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ITB001700401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b7d280055eef455802b5eae269ee12c8790aee453323a150006d77dd998c93. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITB001900269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc73adffddccaf0222afd58aeb4aa0ae4f1273f161be9b3f46c7282df239069. 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/ITB002200834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc73adffddccaf0222afd58aeb4aa0ae4f1273f161be9b3f46c7282df239069. 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/ITB002200834.
TAXI SULLA LUNA (feat. Emma & Takagi & Ketra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0627ba4f1b1960d2da581fb87e7f975c47d97358bea17170e7002329c90483a6. 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/ITUM72300873.