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 0x1fbf92d18d3e57cc656ac71662fbae8bf766602e8ab34a9d4d1169142374f3df. 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/aa6d804d-3b32-4335-9a3d-e6bd802eb9d6.json and https://artists.proofprofile.net/proofs/artist/aa6d804d-3b32-4335-9a3d-e6bd802eb9d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Amphibious 3D (Original Film Music Soundtrack)
Flikken Maastricht (Muziek van de TV Serie)
Dolfje Weerwolfje (De muziek van de film)
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 0x2e6caa72050a2fae598a3160f8415a456ee424b075e84cf39253cd2324912d2c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLM571100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f2f88b6c8b995acb88df99362f8dc5e5fda086e326c0ce59d3015ccd5a6d8d. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/NLM571100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ed832e2a209a10b87e19a1dafecabb524f1961af30a527b14cda65dc88fc0e. 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/NLM571100110.
Alleen Maar Nette Mensen (de originele filmmuziek van Fons Merkies)
Alles is Familie (De film muziek van Fons Merkies)
Het Bombardement (Original Film Music Soundtrack)
Het Diner (Original Motion Picture Soundtrack)
Flikken Rotterdam (De Muziek van de TV Serie)
Kikker en de Vallende Ster (Liedjes Van de Voorstelling)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7a0325c4621211ac60dc96f05f2abf175b1ee15ece66976cda43f898ff0c22. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/UST8K1828665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb578fe2b5582aa3ffbb9ea22f01558ea6b00d766f7dc2b2baba9dad13e28e4ef. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UST8K1828668.
Aladdin (De Liedjes Uit de Voorstelling)
De Kleine Zeemeermin (De Muziek Uit de Voorstelling)
Kikker en Het Avontuur (De Liedjes Uit de Voorstelling)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cae672e85308f317b98494e5913161da5dd3289e239f1228e4187180863910. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZHN71978905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb658056ec5b2da6d0188e6bfe69d7e4552e4a238f63c7d6120e21bf05103ca96. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZHN71978906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0ed656cc49b532a59f8d5f542c1d66a4ca801db11741a5a52a0d90047bdd4e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZHN71978907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269bef28e82ce15537b0af9c10a8678cc78516de3ed852516e79860bd04fa790. 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/QZHN71978908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eeda14a2987f11af4dbca3b29cd6569a0e4f8e44eecab5890eb737477885841. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHN71978909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc84be29180f48a67a318216b7753dae67abad477e3776f5e9b6662edf9cc77b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZHN71978910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51292fdf5396783c4fd998221809e167da3d4ab66763c4d5bcffd0541bf2ef4. 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/QZHN71978911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae5cc95e1f95af99439d9e34b199018cca13687a90828202b4b0f6f500996d9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZHN71978912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953034a954c1aae0f95b989ffd4a5efd9126ebc082ebedf644aabeed658cffc8. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZHN71978913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81017a07e133b69ba36da25f842cf6ea2b2e17d55029d8ebd135cb04495e9ea7. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QZHN71978914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31d5a0b39083aef387902e10a6d790ede106bd66f030c60f567702dc5512615. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHN71978915.
Peter Pan (De Liedjes Uit de Voorstelling)
Sneeuwwitje De Musical (De muziek uit de voorstelling)
Faithfully Yours (Original Motion Picture Soundtrack)
All Inclusive (Original Motion Picture Soundtrack)
Máxima: Season 1 (Soundtrack from the Videoland original series)
Invasie (Original Motion Picture Soundtrack)
Victor Vleermuis (Original Motion Picture Soundtrack)
Belle en het Beest (Originele liedjes uit de voorstelling)