The Chicago Sinfonietta is an American orchestra based in Chicago, Illinois. The orchestra was founded in 1987 under the guidance of conductor and music director Paul Freeman (1936–2015) to address
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 0xeadf363dcc2f1ddef4572ab2ba4946ea69d1008f0266d9a4b1322c36ce14505a. 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/bd0d4be0-8116-4dfa-ace2-f14e47098edd.json and https://artists.proofprofile.net/proofs/artist/bd0d4be0-8116-4dfa-ace2-f14e47098edd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Project W: Works by Diverse Women Composers
Dances in the Canebrakes (Arr. W.G. Still for Orchestra): No. 1, Nimble Feet
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 0x6f33ffd674a481fb725a1f57815f212930ef6f24fa5937a82e0842ebc79239ec. 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/USB801067432.
Dances in the Canebrakes (Arr. W.G. Still for Orchestra): No. 2, Tropical Noon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82a1514e1a79cf54a0248e036738379e17efbaf9bfc9441aeca590887bf2730. 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/USB801067433.
Dances in the Canebrakes (Arr. W.G. Still for Orchestra): No. 3, Silk Hat and Walking Cane
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b2e6d68d5c02e4b146933f395f81930ee060f9adeda31c4f954b68874c729f. 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/USB801067434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf535789e6c52fddf097dd7d2cfd280182094b0cde264c981d0141e4f20304198. 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/USB801067439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048504fbfa396e906c9d8f60f1ee2751da7cf04fd3de6f387baffb5ca7c1e2bb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USB801067440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9104320e5b1fda431d4e6abd70cda2c445623fad83670f8d0cca33d430246520. 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/USB801067441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760c24b23b79b3e39f19be7a5570b96c6672c8391e8b555a0bc8c2b75fcfe4c0. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USB801067435.
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 0x35eb27efe7902ddaef13f4fe5a5fa190c05572b03006afd321eb53d1932d9d36. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USB801067436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd07a4e0aadf556a851af1fd0457d19ee200b9cb3a34c4c5dfeacce75fad898d. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USB801067437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29aae906799566bbcaf54df02b16d15199d902f95813fb41fe3213941621b20. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USB801067438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d661ede6d9389fe63e8df2ca87143f581bbea8fda3c3e15e98c562b113095c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USB801067442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7367b796593be7151a5ecd1dd623c01ff6a3b2f9c875913bdc067a4cc2138e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USB801067443.
A Tribute To Dr. Martin Luther King, Jr.
African Heritage Symphonic Series, Vol. 3
African Heritage Symphonic Series, Vol. 2
African Heritage Symphonic Series, Vol. 1
African Suite, Op. 35: African Suite: IV. Danse Negre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f88934a369061fcd44bd5dcc057126e4eabb2c0dc9ff41c0f7b0a47728d4d41. 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/USA560561916.
Mozart, F.X.: Piano Concerto No. 2 / Mozart, W.A.: Les Petits Riens / Mozart, L.: Die Bauernhochzeit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4346cd7b32278521f9581b763546fbd3fcb87b2952cbc8c2284285c8056f15. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA560561907.
Sowerby: Symphony No. 2 / Concert Overture / All On A Summer's Day
Ganz: Piano Concerto in E-Flat Major / La Montaine: Piano Concerto No. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d90effa622f75e80622d0761123056bcb65fc8dea5a1ee81321870a868bf19f. 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/USB8U1058950.