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 0xf0ae16af15fff456858a8d188a5f90bb16ef5060911a186d84d82fb175d3c498. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a90f947b-71c7-4aab-aab9-41f8faccef17.json and https://artists.proofprofile.net/proofs/artist/a90f947b-71c7-4aab-aab9-41f8faccef17.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
March for Military Music in D Major, WoO 22
12 Contredanses, Stage Music & Other Works
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 0x5b05663a7b97722f996ad20c945ea2ba9393123b4b5b4424d47080e069453461. 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/DEF056904010.
March for Military Music in F Major, WoO 18
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8418fd8bb459c89282f8ed1a0419884d325c4836d559d24ea4230957148721aa. 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/DEF056904040.
March for Military Music in F Major, WoO 19
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264f15c94900fcad0448fd6524c9a3363fc9278a6485e2785250c32f6073f114. 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/DEF056904050.
Beethoven: "Egmont"; Wellington's Victory; Military Marches
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8418fd8bb459c89282f8ed1a0419884d325c4836d559d24ea4230957148721aa. 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/DEF056904040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264f15c94900fcad0448fd6524c9a3363fc9278a6485e2785250c32f6073f114. 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/DEF056904050.
"An Era of Classical": Beethoven - Orchestral Works
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8418fd8bb459c89282f8ed1a0419884d325c4836d559d24ea4230957148721aa. 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/DEF056904040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b05663a7b97722f996ad20c945ea2ba9393123b4b5b4424d47080e069453461. 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/DEF056904010.
"Classical Inventions" - Bach, Mozart & Beethoven
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264f15c94900fcad0448fd6524c9a3363fc9278a6485e2785250c32f6073f114. 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/DEF056904050.
March for Military Music in D Major, WoO 24
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe809e93929a0e846a53e18ed3a32b7c54677331223fc5ce2c5b6f2dfdc6f0c2a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEF056903990.
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
March for Military Music in D Major, WoO 21
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cba078de519e48097628340b3a8c99277d88778614e1c8915b342e2b492ae7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEF056904000.
March for Military Music in C Major, WoO 20
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25899bcc96a40ea316b21f30edd1ae1b269f212b16e7363a3603ec17f952a6a. 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/DEF056904020.