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 0x49761c7b616397d8396d6718b656385eb1facb555edb9957849f0ac0cad08211. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e529140e-4a6e-4bdf-bd5f-49faf2e4783d.json and https://artists.proofprofile.net/proofs/artist/e529140e-4a6e-4bdf-bd5f-49faf2e4783d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x3d93a523ce2a5a208eb00fc58fe8514eeccc28cc74d494b50686e68b4c73ca0f. 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/FR00W2200231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b6ef3a5c4873c3c159b1ba64a821da5f81b802996104f4539e76fa6005435d. 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/FR00W2200246.
Flute Sonata, FP 164 (Arr. for Flute & Harp by Anonymous): II. Cantilena
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457b2808ebdf7d4499094671b570670f5daa369ac4b13130f917b6227df680c0. 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/GBYDS2400290.
Orchestral Suite No. 2 in B Minor, BWV 1067: VII. Badinerie (Arr. for Flute & Harp by Anonymous)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7251269113289a4df1ff8ebe6a1d8568aff7bc37af0b66a8c6b47902e711554. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBYDS2400293.
Sadko: Song of the Indian Guest (Arr. for Flute & Harp by Anonymous)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f5b7836edca0aa77a60a59e4a3b04e15697879d879cfcd7c756408266932ca. 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/GBYDS2400311.
7 Canciones populares españolas (Arr. for Flute & Harp by Anonymous): No. 3, Asturiana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4926c9de0eb47fa7328caeb9dff3e432f4015ee07842f4bea0ae7ed19b4bd568. 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/GBYDS2400314.
Flute Sonata, FP 164 (Arr. for Flute & Harp by Anonymous): I. Allegro malinconico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c64a57f78843ad15324d6c24a315b02893641dc836dd5837665cd2b559eea55. 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/GBYDS2400289.
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
Flute Sonata, FP 164 (Arr. for Flute & Harp by Anonymous): III. Presto giocoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54f6529e757b3a5b7fc43d625035d16d15b018f88ea72fea7527e874e4d0deb. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBYDS2400291.
Orfeo ed Euridice, Wq. 30: Dance of the Blessed Spirits (Arr. for Flute & Harp by Anonymous)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c43e54007881e7c41b3f10283d42fab2fc07cce902d7c9da8583e3afe39853. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBYDS2400294.
Suite paysanne hongroise (After Bartók's Sz. 71) [Arr. for Flute & Harp by Anonymous]: II. Andante poco sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde2ada413a9083f834fa82b36196c29baaf8b9cad8fd5b5172ff46b9d747ec2. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBYDS2400296.
Beau soir, L. 6 (Arr. for Flute & Harp by Anonymous)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d044fa0287f31c1e58b9586ef586f46bf52da3482ca85d0038ff4787f28d8ed. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBYDS2400310.
7 Canciones populares españolas (Arr. for Flute & Harp by Anonymous): No. 5, Nana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a9a74be5671b90de5ff1517f2d3f93f9c8776ccfaec23ce4e57ae82374c2c1. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBYDS2400312.