The Metropole Orkest () is a jazz and pop orchestra based in the Netherlands, and is the largest full-time ensemble of its kind in the world. A hybrid orchestra, it combines jazz, big band and classic
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 0xd3d9eaaac8afd4bdd077f7f6dc499969c549c67fa85bea5fe8a3ead6b2a00e3b. 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/6e0b3c77-af05-4e73-87ca-58b6f95b6e43.json and https://artists.proofprofile.net/proofs/artist/6e0b3c77-af05-4e73-87ca-58b6f95b6e43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Musique Qui Fait Popp: Highlights from the Works of Andre Popp 1952-1962
Tabloid Suite - Four Pictures of a Modern Newspaper
Raymond Scott: The Chesterfield Arrangements: 1937-38
Kodachrome: Raymond Scott Compositions for Orchestra
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 0x01223e3d447176ec773a8190390752a44dcce70ce04af04f7a301911a65f85c4. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEE289582103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb157cc0af621ec55868ecf87066acadab8658d3c09dfb7281dfa560318a7fa86. 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/DEE289578103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc8cbb9dd67d508110b136f1b2a1e24a4fc03f7ec30c16b248e9901de44d532. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLS241103836.
Wereldwijd Orkest (feat. Edsilia Rombley, Trijntje Oosterhuis, Leonie Meijer, 3JS, Jennifer Ewbank, Ruth Jacott, Paul de Munnik, Giovanca, LA The Voices, Hind, Glennis Grace, Karin Bloemen and Lee Towers)
Lalla Rookh in Concert (Een Ode Aan Baithak Gana)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e939e96d1712885e3011bc490e54f864257358f7a74081e01ffa039304777fc. 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/NLUM70700650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7caf45cbd27552df027f638c2e85f5006a83479fdaeb14256755430e47ead070. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NLUM70700648.
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
The Show Must Go On (ft. ZO! Gospel Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0dd1a8e82d724fcb2b2e9dcaf83dd0e34f3b778f683bae7e256db43a74da94. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/NLF7W2000019.
Metropole Studio Sessions: Dutch Jazz Jam I (Live)
Metropole Studio Sessions: Dutch Jazz Jam II (Live)
Contradanza del espíritu Metropole Orkest (Live)
Contradanza del espíritu Metropole Orkest - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b9869642ab9379997d69ec18894ff62c9b9153585023b4fc3370db6cea31cc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLF7W2100025.
Then and Now (The Artistry of Ack & Jerry van Rooyen 1975-2020)
Weird Nightmare (Live at Transition Festival)
Metropole Studio Session: Dutch Soul Jam (Live)
Metropole Studio Session: World Tour - Brasil (Live)
Metropole Studio Sessions: World Tour - Cuba (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe053689acd81505841222a3df85802ae6a4947a614e8658c39f5eeef461901. 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/NLQ8D1800137.
Hold On To Tomorrow (feat. Metropole Orkest)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3597e09b0709478984afb13a53deed244dc4b5808b0de11635250d15450e440d. 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/NLE802000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe053689acd81505841222a3df85802ae6a4947a614e8658c39f5eeef461901. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLQ8D1800137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861cea51c4babeaa10d173bdd14beabeca4ca458ddcd12aaf0ef48efbab392ae. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/NLQ8D1700537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b3750b97b6d37ed3bdab4e31705827ec90cbddf3060a6f0c9cb7ebd8eb5329. 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/NLQ8D1700538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8c384a2e2c7bb69e09039f5cdb4e3ea204f4029e8e9c4eb24fed0f0b70ba12. 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/QMEU32113934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d206e1fa6894b6a1a169888f668523ea22ef0e61f4318d9a7c7c4447ee089b1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLQ8D1700539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052bfd07ee5c3dcb338a99b93ccde5457005f32eb917cfc5a03b9e91c2719de2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GB45A1901852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dca9ae84ffa2525b8d5c8f3f5c926c3afb35d54c3ee5a522967104b50da16af. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLB150500294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c30f337f162ae3ebd682c1706dce4d11822a49f3532036a10373ca3d5f2cf71. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/NLB150500290.