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 0x84c5410e0c84cde6959a7521c01c810b8fedf6869b42ffc75a0a9c3f3573054d. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54f19ffb-2551-4722-8bf8-218a9cd6ddd8.json and https://artists.proofprofile.net/proofs/artist/54f19ffb-2551-4722-8bf8-218a9cd6ddd8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tartini, Rochberg, Dallapiccola: Elogio per un'ombra
Sonata No. 1 In B Minor, BWV 1014: 1. Adagio
Johann Sebastian Bach: Six Sonatas For Violin And Piano
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 0x4d04d5d828fe7b13d82bc89941720496ec5c939467f3251cc528398b4f489290. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEB331023001.
Sonata No. 1 In B Minor, BWV 1014: 3. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4661b0415a445d1daf839b1fc11ae129c2e1c0294fe095cc9d0ff00ff620fe6a. 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/DEB331023003.
Sonata No. 1 In B Minor, BWV 1014: 4. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42313658d16e0b1e56bddf573a1ff328b57ea491cc3a59cb0d4c255782feeade. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/DEB331023004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed28748a003b3d4cc9cb2133032de4c34de17a67ce688b76ea1e148855884c64. 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/DEB331023010.
Sonata No. 1 In B Minor, BWV 1014: 2. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a285feb0e5e1282fb1e5aa1ed5cb695af66ee0147efbd34a0420c64cef7394. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEB331023002.
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 0xd5bfcd55ae70176838456edcf07750c9c90c4bf94a02246116aa6c5f5e906796. 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/DEB331023005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dd7ed64412eabfa6cd05a8f7edb30493e102823b8cb37e1fd333f6a8861556. 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/DEB331023006.
Sonata No. 2 In A, BWV 1015: 3. Andante un poco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b7bcfb3d28697821300bb4b599431ced59c2cdf868059d577cbfaa48794e06. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEB331023007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78519851afe841d63de21e6fe86cd2a35e7aa9a3b942115907777160563630b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DEB331023008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0781becd670f11e4e0680e12a53401b7f6ff88722f04dfb4c17697249cb5c56f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEB331023009.
Sonata No. 3 In E, BWV 1016: 3. Adagio ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7820ab317bd8a9679e5026fff8d60eed25814fdd1e2fe231daa55c17cfc7a55. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEB331023011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4967091a0fd40ca477c7648f41e31cd8576ace1fc128649efae9f41c7c0251ba. 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/DEB331023012.
Sonata No. 4 In C Minor, BWV 1017: 1. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f807a63d36871706d0f97fb963d4a0808f1aa5889260efdd1e41c16b96b95f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEB331023101.