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 0x0058b03ff663cef83385136ced98a76566a792b35de476179650f96109a25b6d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea0febab-d22d-4fdf-bf05-833e61aee4f5.json and https://artists.proofprofile.net/proofs/artist/ea0febab-d22d-4fdf-bf05-833e61aee4f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Violin Concerto in A Minor, BWV 1041: III. 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be03b4764dfa77dfd36c85295f63ffd7ce847a6ebd95963b6be4d02ea191118. 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/NLY331805982.
Violin Concerto in A Minor, BWV 1041: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfff5362b286d7c4629e4fe85e6afce25b394f211a9808f9a26308204453ca9. 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/NLY331805983.
Violin Concerto in A Minor, BWV 1041: III. Allegro (2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d5e9d32c3ba19ed5dd19feae54756869785181199a4cded18b69bf6acd6cd7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NLY331805984.
Violin Concerto in E Major, BWV 1042: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd45fac548024a5a35fe5d28ef10067c89d1fb6052a58dc5ffcefb2902e2b12a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLY331805985.
Violin Concerto in E Major, BWV 1042: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f02032f63ae9538b4155d950705da8548dd3dfc21dfa229deaad83580cb7f89. 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/NLY331805986.
Violin Concerto in E Major, BWV 1042: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a6932d55ec0d1f0e9e4ada0138edb16bf465dcccaf09711e5272105e953b88. 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/NLY331805987.
Violin Concerto in D Minor, BWV 1052: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db4c815fbf7d794fa03e3ba9b15f80b93547aeaf7bfa655ff4e569708176e7e. 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/NLY331805988.
Violin Concerto in D Minor, BWV 1052: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f592be1a3d6545537fcd1468454e3b0c826c5e34621139b4d8dc21b3c3a050. 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/NLY331805989.
Violin Concerto in D Minor, BWV 1052: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f7e4f25056ff14a7f08e33b27ee5eafca314e159969edffd7eb5abba8e34b8. 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/NLY331805990.
Violin Concerto in G Minor, BWV 1056: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd459df2366a683018a08dc94a21284533c99c8b0785186b0ff5932306cf0c8. 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/NLY331805991.
Violin Concerto in G Minor, BWV 1056: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd665e06222cb44e800c48d8e0bba7cc61fd6ef3fcf089899d5ebb1ffe7620300. 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/NLY331805992.
Violin Concerto in G Minor, BWV 1056: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575af73981b3a99b789a2377885a2a7bb8b86dea5d144afc380f0e1760b66504. 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/NLY331805993.
Concerto for 3 Violins, Strings & B.C. In D Major, BWV 1064: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593a59e67d350867617e969290a8d7f064325f1dacf38041d84a583ec7769f1b. 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/NLY330605730.
Concerto for 3 Violins, Strings & B.C. In D Major, BWV 1064: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab5ceb70792c79e1cfc613eaac46194bd8be502d641363cbfd4b4670e768527. 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/NLY330605731.
Concerto for 3 Violins, Strings & B.C. In D Major, BWV 1064: III. Allegro (2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99477f9c32dae439554910eeae81a3cff927d315713ae92aea5b0898227c945c. 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/NLY330605732.
Piano Concerto No. 2 in G Major, Op. 44: II. Andante non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b45522fd961947be783905fcd7351b2a480474d040cec1d7d61da0218ee627. 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/NLY330606878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5addc73b771067b53cb82b4743e59660bafb5ab63ab65c00fcb94983acb85296. 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/NLY331405733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba5d4e55a91a8b29273a2a6584191e310104ce0fe89090f1127ef7f29f84738. 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/NLY331405740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb520404c3d129731d51adac60e905a8568cef05462c5655367e02248887186. 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/NLY331410103.