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 0x0b9219b15fe9ba22221173fa4a9e1a933f28cc8c61d00cba3563ce7cf899c972. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80791c84-04a0-466c-a0a0-70060a074de0.json and https://artists.proofprofile.net/proofs/artist/80791c84-04a0-466c-a0a0-70060a074de0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Classical Music Meets Jazz: Pachelbel's Canon In D, Beethoven's Fifth Symphony, Flight Of The Bumblebee
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 0x55011e67bf6b95ffa88ac3c5dc98986642655274d33a948007d5fadf0da486c1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USTC80983314.
A Fifth Of Beethoven - From Symphony No. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e9d6707cda3517d02809fe664f959805a5d74db56e4e1f279bc9130e59490a. 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/USTC80983319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa081fe3e0e0de50ad8cb9200c9b3c0f3d028ceb7d99b38cf8333fa9a7105e32d. 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/USTC80983327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba192bbbb5d74ce5c4b2d34f8d5012ab9e138650fe588628a5372c9d2f3988e1. 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/USTC80984331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b665d466d6aca89573352ddaa7aec0eacad5f38d23670fa11ca7f0ef6f72e3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USTC80985555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd690cf0fef61099d4733877ad58900501d0b8277242cb18ddb6d71cd7e90bdc1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USTC80986225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70df857819b46aa708f671d1337b6ad8dcc90a108911a425a697a994e0f32f03. 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/USTC80986232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f07331ca57337192e455a14827cd265c4c23fae5180f76fb93030d056a97560. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USHM80545688.
Debussy: Clair De Lune and Other Piano Favorites
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cd2d09501cccdd8a7426c39f62bff6f0f58cbf0288f52c90028266312496eb. 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/USTCD1095086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4bf4dd850b7310681290dd72094d1a4a5743968aea166563221bb33109de49. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/USTCD1095088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c761853cfac78ae5f71283c36e67845d3ac1a13b61690747ac6f1bfe76d18a. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/USTCD1095089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25028b7d64be3ce228ec940fa851d14dbe0d8d4e393f3653efea034a7ecec9f8. 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/USTCD1095090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3927cedc27454a0a1ae5f89cef1aa6c953105fab83499fb3e3d5ae9847203c13. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USTCD1095097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b78fa6a49ba89edeba9de75545156b8b8bb99ae35cb8b6011fc319859102e6. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USTCD1095093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670b10e8859f9c3ca647d49d71e6ecea4e87e93098228cdbc8ecc1e3ca7cabd2. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USTCD1095091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f04446c51aad4ac8b355826d1f2233130e846b040ac3793fdbd648e0fd116f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USTCD1095094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd54e6bd05266e2b20c153068df3925a0fae69372437220c39c6a3fce28e1cf. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USTCD1095098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0eb3386afea9e87a5c75afe15727fa35b6a28e343b7100511743c62ff28a11. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USTCD1095095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5db1bde8f61f7e206fda000e9f3dd491acb3158a78ddd3396f44a37d75d6d06. 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/USTCD1095106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e96b2e5cacd38c11dd7941c11f7d628cac726e0cc06a1d5f36e808890f22bb. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/USTCD1095092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d742605e61306726d32b414a8a760ed47c7c7581f74217580d1379f7778336a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USTCD1095123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfef948dac363dd8726d1b7a03681b8be548055c304b68e8ed2c445f2c7f5023. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USTCD1095101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277eafc3d10579abbf317b70dc199d95b45c71a8bdbd2e47e3ab92807fddcac4. 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/USTCD1095103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb6e81798f9aa380e0e8ed0583dcd74f8265d6cf7a094a4162b306c1dcda941. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USTCD1095105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e61f3fbc989f32f1149144b08a0afa1955d7b211525e50821c0a8275f34f2aa. 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/USTCD1095108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ce664df6696c70b55efcc744b2f59b178daf9ba4dfdd00c3a0488261d1a3fe. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USTCD1095109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0588f5b3cd83c7e5e1261b8ad723817be78d0358ab2ba9ccf89b22403fdc5a1. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USTCD1095099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d679c08c7fa793c497924d05e81d08ed16301616855ec7efaded48cb3b359ce. 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/USTCD1095111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374a22318ba919690f6d7b0e223024af2c810d2c2e266140df32700a4df25fb8. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USTCD1095113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba41d39179bb879c3decd7ec872f2b87b7b7c69244584e20f453bd55348208e. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/USTCD1095114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257a3dd29c1a7265694750e5d7dd7d2d6c9f9afdd74ae0f7cb4220d4c8d09550. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USTCD1095116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaecfc4462f8e87016da75820ac8d187b048f675214851c8a61e721eb555123c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USTCD1095096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7f215c94eef7ad3f413daa7eb667e0e113e89342172eccb90bd23dca26da6f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USTCD1095118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41da3a893a12e195949398cced4a030392abe4cc65b8c236331b1311c52eb40. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USTCD1095119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e6d7083fa00054148e01d909377ce59eb0b7534ff4e7cd8f74bc278f75e12c. 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/USTCD1095120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7804dae92219c187d40da220a8fe7f08bc1fe3aaa02df63522734790b331789. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USTCD1095121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9383cc6714024f2c42fd878a0946cdd618b835019b5326a586f6f1560f35465. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USTCD1095122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc895940f426f2e788403f5ea067489de03fa696e686af2b4f69ca0ca605cdfd7. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USTCD1099390.