Marco Roberto Borsato (, ; born 21 December 1966) is a Dutch former singer. Born in Alkmaar, North Holland, he started performing in Italian before switching to Dutch in 1994. He is one of the most su
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 0x3ea65c5e020279bcdd841e4aec842d5a3533e624da5bce890721041f8ff171d9. 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/7fae9895-4f2c-4bb7-bae5-ec7f8bb3c16e.json and https://artists.proofprofile.net/proofs/artist/7fae9895-4f2c-4bb7-bae5-ec7f8bb3c16e.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 0xcac02cff63f8095d6853686497f5039291ff557d23869228c50f4163a7783b46. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLA319800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65095d25a47d0e714fd5414b21041c3c20dc8fa784603a13f4becaf35a540535. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLA319800078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f818910a43a9627977e0ab7c871a4a8ff9749311415788d5b98065d63aa842. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLE070400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57a62fc78e88155d45b7d7c72ca997c22da125f9e8a26271c8ee8254d97d4c6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLE070400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8095241e6f6a6249c899eaee35a3fe67489dd0bbba15a746c1b2874cb3df8f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUM70601283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9424911850bedfe887873ac4c9a1230509573d96c7ae314e0a8f63a9640a7d1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUM70601285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1443a07e71277e8ecc59c14f3c63f2d0eb06aa3635c7d06dcd43bd9aa5dabc35. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUM70601277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e94bf23df5fd65effe1d55b47439efb9e549d1af99296897f68a150441a7496. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUM70601273.
Marco Borsato 1990 - 2007 Unieke Opnamen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0361a9202e0c3ed615f50fb3791fdbf8250988a8a87eae1ea0fc04e94cd6591a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUM71001191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3932baec0ff721fb10a895507234e3dfb3f15a34e0ed7dc58243286a7dc1d56d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUM71001194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a45606101d8d5765ed3202cb47e1ec67f52e1e46215271ed967cd4e6158ffa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUM71001195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c14be144069af89afc6c6dad2742de6f7f5920cb3ab94ed4825a338c7a3c83e. 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/NLUM71100232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc09e3a653f357cee23d2de79abe1601e04d4dd9e176b18df9ea7b74987798e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLA319500198.
Ik Zou Het Zo Weer Overdoen (met Trijntje Oosterhuis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465bbc8823771581d28539c0115d4e1b47b842f9acb0c258ce18ddc548429787. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUM71300410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71547948db3c8a17e51e5f9a371a7178a408651dbb57ea45373900c9e5011501. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUM71700846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9769616d22284f115e6a4143eeba6aea5a4abbf2e106e918c15e59c18f7c061b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLUM71700853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe201dd9eb6f57eb94e400db10c5c9a3f072a4ef21b708f52bf1e350ef45b7f34. 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/NLUM71900371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c98d550da7065e5704778d448050727c5d60cb328549abe703732285b10840. 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/NLUM72100357.