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 0x7292fb2a0a81c00ff638476f133768526912bc99725a8903415b772ea2dc0bd2. Chain 2 (Bitcoin): anchored in block 953943 (2026-06-16T11:59:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2199a64d-cb79-40ae-964e-628a0ef32626.json and https://artists.proofprofile.net/proofs/artist/2199a64d-cb79-40ae-964e-628a0ef32626.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Introduction And Allegro For Harp Flute Clarinet And Strings
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 0xfe1534a8b8b7f850ffd6706883c76c0e8ae7175f90f8e4693c4c09551481c7c2. 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/DEF058903200.
Sonata For Violin & Cello, M.73: 1. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24594c07f019a27bab259acc054b7788d336f2cfca52a30966278d465493d4d5. 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/DEF058903221.
Sonata For Violin & Cello, M.73: 4. Vif, avec entrain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe39f06cc66c223c22cf40ef20b869806ee29e4dc67088de7a0ae22f9f1b8814. 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/DEF058903224.
12 Chansons de Bilitis, L.90: 6. Bilitis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3171ceed7263d7327adebdfae618896d4091355fd1ebcb6ce2e1ca5e25217ee. 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/DEF058930506.
12 Chansons de Bilitis, L.90: 7. Le Tombeau sans nom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ca9a746e1831d65c5f8bba19f424434540fe5d2498758ac91aa164091144aa. 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/DEF058930507.
12 Chansons de Bilitis, L.90: 11. Le Souvenir de Mnasidika
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe9402fa4cbbf6be09d09e3bb0666b37fb5c068bd9233be874cf7ec2b1c841c. 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/DEF058930511.
Scherzo from A Midsummer Night's Dream, Op. 61
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cceb0fa4e51213a6a0cea097de98af874388b409cbe062b9843283fd798f7fd. 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/USSM10015036.
3 German Dances, K. 605: Organ Concerto No. 6 in B-Flat Major, Op. 4, HWV 294: III. Allegro moderato (Transcribed for Harp and Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3152c75c3e248bac2a9517e18bf50793c337bae4dfb95b27c9a7d2d06c9e9c6. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USSM10407173.
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