thumb|300px|Alberti performing in 1980 Carel Verbrugge (14 October 1926 – 18 February 1985), known as Willy Alberti, was a Dutch singer, who sang in Dutch and Italian. He was also an actor and a radio
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 0x31b79e606e916a16a0b5912f5af0e64adbac6fc674903145d2d76adf8f51d4d1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2a646df-d19b-4d16-8083-adf41f5585d3.json and https://artists.proofprofile.net/proofs/artist/d2a646df-d19b-4d16-8083-adf41f5585d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
E' mezzanotte (feat. Jack Bulterman et son orchestre) [Mono Version]
Festival de San remo 1960: E'mezzanotte (feat. Jack Bulterman e la sua orchestra) [Mono Version]
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 0xbfc2a87245e3bb60db7ad44ec5493d38d04e036f1b8ce8fb4db51c17e8e12b77. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:39:06Z), 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/NLA306200028.
Liedjes Die Mijn Moeder In De Keuken Zong
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf08bfa5c2b8a1b52f7e428a327562c128b7975cd8d5a1d6eace7ee6c6d9bb69. 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/NLA240100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b16352ab6c816396759cc8c304059eeb51153e86546d7604edd8b9da91d5f54. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:23:41Z), 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/NLA240300537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7f3628f797639815c46e017de03490a1d8c9fbb26120432b4193c30c34bbcb. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/NLUM71500207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa365985646611dd6d6e66752dd470e3d1ae3891cfc38a805eaef539e109c97a7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:03:27Z), 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/NLA240100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432ced3a8c48e3f865491683b13b0047cdd7917e6140bf5b47bccceee3e4f543. 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/NLA306700056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6addc6df7fbfc8893c1a1a9bdb1c23450f8183e2a6359c95b359523033e9be9. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NLA305900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a391fe22d067b80f5c964413bb1fe3c2f881e1964b3de3bc22aec2818378174. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NLA305500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2793c58315914db3d75ea665457d7e62df75dff5342f5e3e5342eec25931658e. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/NLA305900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a27fdc0070dbea9de30c76eeb736fead3d81a46c7d522f504f6a9fca9399cc. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/NLA306200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7d919ff83db9d8a26e6a092fd08bff0083ded75b66689b53b8c9cda1fe2a60. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLA240100095.
De Italiaanse Singles, B-kanten & Curiosa 1958 - 1961
De Italiaanse Singles, B-kanten & Curiosa 1949 - 1957
De Nederlandstalige Singles, B-kanten & Curiosa 1968 - 1973
De Nederlandstalige Singles, B-kanten & Curiosa 1940 - 1959
De Nederlandstalige Singles, B-kanten & Curiosa 1960 - 1968
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2ec78f43d90a1367837cea5ed4473f0d05c6d16ff6f0d9217c3fb330071605. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLA306300151.
De Nederlandstalige Singles, B-kanten & Curiosa 1975 - 1988
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7777e62fb1e5b3ed0242ccd959634b7b91f97ade8910ced5b61bf3b91c12fe75. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/NLA307600111.
Willy & Willeke Singles, B-kanten En Meer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ad7fea1d718b1d8f32739022772c9d60fb4a7d3633b1404023444452ace989. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/NLA306500089.
De Italiaanse Singles, B-kanten & Curiosa 1962 - 1973
Marina and Other San Remo Festival Winners
Hollandse Hitmedley: Vrij en Blij / Hoor, De Muzikanten / Als Een Wilde Orchidee / Kijk Eens in de Poppetjes van Mijn....
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f27bcacc796c5d40f51aefa725da07f638cfaf4404ce815ec26d65dc76aaff1. 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/NLHR51273975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eba278e659f37689b36a13db7d74ddf669e1fcda79eff9bd0e868b1155715a9. 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/NLA306800175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2e38fd47aacb85c13b64557132244f67f97b6209240a8dfaaedb136c176e87. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLA306800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eba278e659f37689b36a13db7d74ddf669e1fcda79eff9bd0e868b1155715a9. 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/NLA306800175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e78ad9b945b341fbcccc3cb189ba94e6887c8d1eadcf25c71fd4dde34e08cf. 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/NLHR51268453.
Hollandse Hits Van De Jaren Vijftig - Dutch Hits from the 50's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe732c4b478f0ed2f9f8410db12284f0baaac7c8c5ce9bf94e5f3b1c2f9eba151. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLG620426311.
Amsterdams Goud deel 2 - Gold from Amsterdam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff69004543f0d24b737ce2f28a8a8e0332f55c03301c7cd0f1c07baaaaf7f45. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLW2R1705747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4982fc1d300c334b58a4d6e8833c1b193c630e494a5283798a81ff82b63893. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/NLS241201714.
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