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 0x79a93decb58bfb57dafbd6e7292febe8a6fe189d010a0785537bf0bbb1a18ecb. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6f32c1e-3833-4a74-a799-62d7456f4aac.json and https://artists.proofprofile.net/proofs/artist/f6f32c1e-3833-4a74-a799-62d7456f4aac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Complete Symphonies, Vol. 4: Symphony No. 5, D. 485 - Symphony No. 6, D. 589
Schubert: The Complete Symphonies Vol. 3: Symphony No.9, D.944
Ma France - Chansons Symphoniques (Live)
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 0xb59083cca6c81eeeb00ff96c7580512ab962394cbb43676e711f9ff5c9632aa9. 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/NLB151900677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b7499d4c89f99bb889c426422f2f50868517e0464cb29e4cfa836631cb0ab9. 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/NLB151900684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44593acafeb3bd81739f30891f09f94540b516692492b9ee9ef348d288a64607. 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/NLB151900685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13af9cc873e6db5cbc8e57822edae629f7c240eb6a2895afa355c6b7821044a. 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/NLB151900678.
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 0x76c062fed1b83374d6c02fd6a66f9902d1b043aa05995a700d6ebda99a71d1f1. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NLB151900681.
Schubert: The Complete Symphonies Vol. 2 (Symphony No. 1, D. 82 / Symphony No. 3, D. 200 / Symphony No. 8, D. 759
Schubert: The Complete Symphonies Vol. 1. Symphony No. 2, D. 125 / Symphony No. 4, D. 417
Brahms: Serenade No. 1 & Variations on a Theme by Haydn
Serenade No. 1 in D Major, Op. 11: Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492149dccc197b9e0b1a07fe054b39d4fb62a8022cced3ef77826a0f9076f7a1. 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/NLB151600240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd624cb072b00d629bd4c6009e67fb9433efebeb30dfb5c01d9282b335eca7d50. 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/NLD321900399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53246d2d75fdb705c0e62299e931af8d040a9818a580e55efc1032b948901228. 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/NLD321900404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23e3d8090a15407810c1788ed944ff3aaff19aef8b92ad9fead6eaaecefdddc. 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/NLD321900405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08eac9a0e3480a579725e8d5bcce05fd987348d00de451e3e6d5faa46b0c414. 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/NLD321900406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2785df133cd362aaee92bd44a6ce5c2c7817c8615bd30089ff0c87b0c32e8572. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLD321900397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4547c1b9acb963608cac92882a44edd7f90b79d2580298318ede36728284076. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/NLD321900401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b9acf9f0756413aec00d8ab9ace0167ecbff5515b1a90be7599b79980e5dab. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLD321900402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5179e1e234685ae4833275fdc6e2879036c99ecdba995457704236785ee7061. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLD321900407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34aba9ee9611e97728253aabc9979dd5b388520059da7e689e0b11fced01f83. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLD321900408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2624a38740cfad6dcd1f02d939170b7ab2ccb8f99da66e335f677cc48fc4c272. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/NLD321900409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde621e96d6a58cf2c216bb5d1f603a51e7e9d9dc55b5e6dc6445f08856f6e03a. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/NLD321900410.
Shostakovich: Symphony No.7 in C Major, Op60 "Leningrad"
Beethoven: Complete Works for Piano Trio
Toshio Hosokawa: Orchestral Works, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7cd28537bdb20cda2c029fd1336f34a0242eeb1a5fb23035a32ab98d4ecd58. 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/HKI192307501.