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 0x12c44fc2aa645fe0985ab67eef32da8bae7295cd6262c954689e7b613f6d4675. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa1ff197-3ca7-4847-a967-63287054532e.json and https://artists.proofprofile.net/proofs/artist/fa1ff197-3ca7-4847-a967-63287054532e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Thuille - Dvořák - Telemann - Reicha - Piston - Rimsky-Korsakov - Janáček
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 0x329886ce99f1e10e2e8f8fa09f0048c0f6dbbb0cc3ce8598e6f9a691c87d0cbd. 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/UKJE72000183.
Sextet in B-Flat, Op. 6: IV. Finale. Molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e21a8ceb525ded6d4242142f593c78050633661aff1ece464effb281b991ade. 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/UKJE72000185.
Wind Quintet in E-Flat Major, Op. 88, No. 2: III. Poco andante - Grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8290831407efad36965db1dd3e5d39080fdf5b28c4fddcfc4f010d9a1359ab. 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/UKJE72000193.
Quintet for Wind Instruments: III. Scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ae55fd9f71816d5e85609a4680a74b9be7dc4a03ab5f81e98c981b5bc2cfb6. 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/UKJE72000197.
Quintet for Wind Instruments: IV. Allegro comodo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a2868cc548363edada1bce4e02ec25fc3a38907f41235d1f1138b0bfc4465a. 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/UKJE72000198.
Sextet in B-Flat, Op. 6: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9320774e82cc080b4195fc97ecf2189150c1dcc6360b355315442790496ac6d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UKJE72000182.
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
Serenade for Wind Instruments in D Minor, Op. 44: I. Moderato, quasi marcia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb74e5fba14ad084925f6d3c4452f3e0190834a5b53d417b9c8f583b415b7b49. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/UKJE72000186.
Serenade for Wind Instruments in D Minor, Op. 44: II. Tempo di minuetto - Trio. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215e8d2a9c039d4fc2a76b12569d0764f3a4d07bd385c5eefd6e0d0bf5ac4e38. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UKJE72000187.
Serenade for Wind Instruments in D Minor, Op. 44: III. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f08fe1ef519d9f1fd10de2b411b8eb1018641dda0738821cbeaf359ebbba2c1. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/UKJE72000188.
Serenade for Wind Instruments in D Minor, Op. 44: IV. Finale. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbd7f1c9d3975d77e6372eee6b7bd1c6256ab0363201e1fd280a317114f895f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKJE72000189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcb495e41867613731e866e22ca2177b06db815584e3babfae565ed9c9f9b32. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UKJE72000190.
Wind Quintet in E-Flat Major, Op. 88, No. 2: I. Lento. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6eb064956756947891ab9975dadf05858c6ecf7b2add28561d7d6de474e800. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/UKJE72000191.
Wind Quintet in E-Flat Major, Op. 88, No. 2: II. Menuetto. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6ce155befd2ad87427b43c94d6465776dbb95bbe52e52e57ae85c910e96d00. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/UKJE72000192.
Wind Quintet in E-Flat Major, Op. 88, No. 2: IV. Finale. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ad023692727374966d1eb9d9836e17d9fbdbd025854a2e275d6958b52c1202. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/UKJE72000194.
Quintet for Wind Instruments: I. Animato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650e9daa26682e8a06e10cbd007884ec2a26aa302829417cbde7140e8337bfd6. 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/UKJE72000195.
Quintet for Wind Instruments: II. Con tenerezza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc915516bba31d4833ce0b2a570107dd6c07b4568e0d67fdd4c6599e3f466aa95. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKJE72000196.
Sonatine No. 1 in F Major, TrV 288: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135ab9b69673c763cd97010874fcba46b3be7fab197bf03043a9e91a0b347e43. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/UKJE72000199.
Sonatine No. 1 in F Major, TrV 288: II. Romance and Minuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4330b208ec2c85d8fdfddf36125106ae1ce69dfea387bbf4bf0fa5faeaa8ca2. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/UKJE72000200.
Sonatine No. 1 in F Major, TrV 288: III. Finale. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c1970668e09dcb900aeaa518a13264117647fe80397755346debff2c168a78. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/UKJE72000201.