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 0x39dc5b08ce5c4eb3e20fc63d2b87835d3ea4b9f2c61b8b8d1c4beed70c92e861. Chain 2 (Bitcoin): anchored in block 953976 (2026-06-16T16:55:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b68fed6-6ea0-4dfb-8147-2a488cf104da.json and https://artists.proofprofile.net/proofs/artist/2b68fed6-6ea0-4dfb-8147-2a488cf104da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hummel / Du Puy / Danzi / Weber: The Romantic Bassoon
Bassoon Concerto in F Major, WoO 23, S63: I. Allegro moderato
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 0x247c5645e7a32149f718005c07fb878b06ce2694e096bdf2772a65ab18c610f7. 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/SEAEH9405010.
Bassoon Quintet in A Minor: II. Andante sostenuto (Arr. For bassoon and orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83d8a635c6a652c6bb0f0b5fdd3899009e7fabc1e29dea02795fc4faeb1fef8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SEAEH9405050.
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
Bassoon Concerto in F Major, WoO 23, S63: II. Romanza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f41e8e84e41cfca42450ec2eb4e33cf3a61e2231a9397d218eca09203ce58a9. 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/SEAEH9405020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6042d1f8f8ad68b205150a2fd629e6a21306463f4b3faaf6b80534ca93fcfd8b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/SEAEH9405100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33481e34130768f910f452aa15b72b0a41f834e2cfd7310f99747df04b194175. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USB8U1027288.
En vacker dag: För mammornas skull (Maj-Gun, Margit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0c2a7cc523af3de1cdb54c7eef21f6adc2bd2ba6c1bc9ce28102885b5d4649. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USB8U1027289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7748b1fd663572fd77c4d7b1b45ba76804a1a86a3f6159969f0344e2ea728dc9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USB8U1027290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428aec87afd168cec145ee42374127779502aa7ec5ba8320c5d27433c4edcef3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USB8U1027291.
En vacker dag: Lita på mig (Maj-Gun, Karolina, Doris)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575f8e91629d196f8ae87ed4e1183430f74f51575b352b293042895165ba0c41. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USB8U1027292.
En vacker dag: Jag minns hennes händer (Karolina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b7565804358c5cc7123e2b419cc648a1856b78e96263dca59b4b866cb5b2e7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USB8U1027293.
En vacker dag: Vi ska alltid ha varandra (Maj-Gun, Karolina, Doris)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a53d605a7c005f57a1fabd9a32c350d79db569d393c9302876c54b77593e195. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USB8U1027294.