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 0xec36b5ecd1738363a876eb1518e5a4bf5635ca83bdccdf5d80a23185896bad37. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1d10dbb-2ab6-40a1-9024-1bd46d156fb4.json and https://artists.proofprofile.net/proofs/artist/a1d10dbb-2ab6-40a1-9024-1bd46d156fb4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto for Double Bass and Orchestra: I. Allegro
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 0x9ce0051d1448b6291e3a49cce5d84772dfe8581bdc1f8299159ec86d3433fac7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USZC71124801.
Concerto for Double Bass and Orchestra: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d300b5d527189a21acdabca94ba32f53ad3dca662709fcca7ce47f1c17b6760. 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/USZC71124802.
Concerto for Double Bass and Orchestra: III. Tempo 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcc921d78b4bfe7af58f34be032c58ae293d0366ca13764a837dd64b945f5ec. 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/USZC71124803.
Concerto for String Quartet, Wind Instruments and Percussion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70f1166ee179b31b3321f913b1f1d9f740dc2b6182c947dc43cf9a96178151b. 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/USZC71124804.
The Mighty Casey: Scene 1: The Mighty Casey (Watchman, Chorus)
Schuman: The Mighty Casey - A Question of Taste
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992e18148101ec9228e7763f79ea273e46cf6a9e2cccf93fddfaa916b2c277fe. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USASX0893006.
The Mighty Casey: Scene 1: Autograph (Charlie, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b82c0817ee2dd6e97514568d230bffcb1ee356f659eda86c46e7b77550f2f4c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USASX0893007.
The Mighty Casey: Scene 1: You look so sweet today (Watchman, Merry)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b577d15f9f39d470aad30f34fd7b94312a8f001cbdf2c48c76a2af2aaaf2cd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USASX0893008.
The Mighty Casey: Scene 2: Two out (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db7803994ffb7fa7df8eff638baa63a6dbef6c554dae056292dd6855f88aad2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USASX0893011.
The Mighty Casey: Scene 2: If only Casey (Chorus, Watchman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56b8b7cac964f9040e8e4a1f79b5b092ede4d91feed317cbee473938eaddc71. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USASX0893012.
The Mighty Casey: Scene 2: Surprise (Chorus, Watchman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2c7989c4dc679fd7a92ece5e9dc8222e27622c1f9eb263b0ddd744a24ce36f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USASX0893014.
The Mighty Casey: Scene 2: This gladdened multitude (Watchman, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a0a701128035282210238218858b6c809c3208816262a8024b54d9382aaa44. 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/USASX0893015.
The Mighty Casey: Scene 2: Rhubarb: 'Ya blind (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910f52ce26a6cf2a95644a2bac61ce059c88df368ad0e78706888961d7e3a97a. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/USASX0893017.
The Mighty Casey: Scene 2: A strike's a strike (Umpire, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b489864bed7b963b80896e79007d31c19e2857c6ec1ecea0accc5036a0d4046. 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/USASX0893019.