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 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 0x62a42f6de7ac4645487577bacb241e9d068d3c313d3543f35ffb1f3c031a7da8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c92e1c9b-c380-4d91-b94b-e1c47a6b897c.json and https://artists.proofprofile.net/proofs/artist/c92e1c9b-c380-4d91-b94b-e1c47a6b897c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pathetique Sonata 3rd Movement (EDM Version)
Symphony No. 40, Molto Allegro (EDM Version)
Nocturne C-sharp Minor Op. Posth. No.20 (EDM Version)
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 0x022cfa318817e9a1e6b9859a2f94d9ba030b9a59be7b9c99c9bdfbb3438cc7dc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/PL2DY2400995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a663c6611638963221e944dd83f177f91d49429c7676625e30ff26e1d3acb55. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/PL2DY2400993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eebd8682d9d5f19b52a6e1d8b42d3de7731c4949a7aae53494f128431e8707a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/PL2DY2400992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43220525f0b80e380bc88aff27f0edc2a6b84b26208058a6e4855785fb1f24bb. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/PL2DY2401045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7995b660a0b622257951e67bf3bb1ca2e73b6aca16a3eb9f3971b18a3ad1cc7f. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/PL2DY2401044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04b4af174e809892bf9dcdb46dc20ba6760eb76de81aa1f507532583aafc29c. 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/PL2DY2401043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0607a4c941864f27c4549825f619a25e84ecc5fa0f733611fa69ff67ac40436. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/PL2DY2500053.
Nocturne in E Flat Major (Drill Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fe615e1fc15327cb2d46be3ca35b68fe22a42083def56b2ff87fa0a523f0ce. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/PL2DY2500264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c4f6d49db02d71b3604c53eb8b2444a201e06a0feea0625852935434ab39e6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/PL2DY2500267.
Sonatina in G major, Anh 5, Moderato (EDM Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cca5401150748193d1ca369f5aa769325ed078edfb3f5b8a7ce6372a2d7cb03. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PL2DY2500605.
Waltz Opus 64, No. 2 in C♯ Minor (EDM Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cc21db89ad8f07741b842082a991fcf3a65f862cfe2d50fe329a5735393f40. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/PL2DY2500725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b11bc1a8a52b92a578fc6fe79a5d63f5e6205298c44b9c51c614700ff288643. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PL2DY2500737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4789769772669d5ac128eece4be11640459fc95692fbe0b82bf4607e4715cbed. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PL2DY2500739.