Robin de Raaff (; born in 1968 in Breda, the Netherlands) is a Dutch composer and bassist. De Raaff has written six Symphonies, eleven Concertos for solo instruments and orchestra, an Oratorio entitle
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 0x605bfc380a5052e9542cff842bf491035e9c4582ad1c73e1e5e5e0c92e5654d3. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ed97d79-1aeb-4734-b4cc-1afa0e3cd168.json and https://artists.proofprofile.net/proofs/artist/8ed97d79-1aeb-4734-b4cc-1afa0e3cd168.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De Raaff: Der Einsame im Herbst - Flute Concerto - Megumi-Suite
Jaap van Zweden conducts De Raaff: Violin Concert / Symphony No. 1 'Tanglewood Tales'
Violin Concerto: I. Opening (Cadenza corale)
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 0xe44c0e66b33cffe7fefc10ded243ffb4efff7251f93ed0353744c8ca7bc41d38. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/NLQ661759301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad3ea9de49506263ad33136f2df1877578e2677dfbdbf422e765b40da8518b2. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/NLQ661759303.
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
Symphony No. 2 “Two Worlds Colliding” for Saxophone Quartet and Orchestra: Transition / III. - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c48e35035d8cf998b58102e1ef87a52cc20f22f3a0cb03e4f5bc3495840a5f6. 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/NLB151800074.
Symphony No. 2 “Two Worlds Colliding” for Saxophone Quartet and Orchestra: I. - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f29206b5a50d4537b0f81b1cd492fdc5d5c22b4358c47db35fcbcaf07b6201. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/NLB151800072.
Symphony No. 2 “Two Worlds Colliding” for Saxophone Quartet and Orchestra: II. - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e3ab810cad1a96c61bd32f082140a68860de1992cf766090016e84c1e1a65f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLB151800073.
Symphony No. 4 “Melodies Unheard” a Symphony of Songs for Soprano (Or Mezzo) and Orchestra on Poems by Emily Dickinson: V. The Nearest Dream Recedes, Unrealized - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759a3046f995d3d9ca1d1f857b6c11c3a9c044d24d62ae4d03ed4c27a15fe9a5. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/NLB151800082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c885bc02b267f8985ec56d0cb49ab8b5760cd0ab205cf739a66a998bef5f2cd. 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/NL3UC2301632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d14e1792561c0d07f4e2f6e53bcceead1e8f60b6471f6ec328414f647f6f2f0. 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/NL3UC2301643.