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 0xdc846078059724cc635beb17cddf5b0e2e5c3955362dc8dd4cbf3bf73aabb706. 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/881d6b24-d666-425d-9006-d8b7b4a24424.json and https://artists.proofprofile.net/proofs/artist/881d6b24-d666-425d-9006-d8b7b4a24424.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Oboe d'amore Concerto in A major, BWV 1055R: III. Allegro ma non tanto
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 0x58472ce90d72f2f9c3b21e631b7fa9c47f49761bd94d81aa55bd6ba2ff3865d9. 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/FR7JM1704090.
Mein Herze schwimmt im Blut, Cantata BWV 199: II. "Stumme Seufzer, stille Klagen"
Johann Sebastian Bach: Solokantaten und Oboenkonzert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd893a5de9f520ede7be91dcb79dc6b92d1adc87ba8c1009be93048298ca5e0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEB119900502.
Concerto for 2 Harpsichords, Strings & Continuo in C Minor, BWV 1060: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb9ef1713faff4c3c1c78ed8a4d757f26d796ff84760a642dc89a92c8ed6bfe. 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/DEB119900510.
Oboe d'amore Concerto in A major, BWV 1055R: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8df6d996c165b1e05fa78dee87d0c11dfea548fb38695dffed03d3cb58043c9. 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/FR7JM1704070.
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
Oboe d'amore Concerto in A major, BWV 1055R: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe619eb7609301ffa96b533d4718d4022c9365acd63ed3db44d0ee4bced52b520. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FR7JM1704080.
Ich hatte viel Bekümmernis, BWV 21: I. Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f4bdb6464b352d9322e3f1937f8d568706ca37169f5b3b8cc262bcc304d058. 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/GBAJY9260023.
Mein Herze schwimmt im Blut, Cantata BWV 199: I. "Mein Herze schwimmt im Blut"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289ef84057c576c6605ef469e901af019d03d0eed1f2b0ad5201dae2da08df1d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEB119900501.
Mein Herze schwimmt im Blut, Cantata BWV 199: III. "Doch Gott muss mir genädig sein"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306c652e41b83b5d7a0a814fc79428315a8d633af1d5f1d176c09c3f55882d9f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEB119900503.
Mein Herze schwimmt im Blut, Cantata BWV 199: IV. "Tief gebückt und voller Reue"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42917a5eb65268ed7ee48a0a2f1440817dba0916961e7af7e27c04f40281cea5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEB119900504.
Mein Herze schwimmt im Blut, Cantata BWV 199: VI. "Ich, dein betrübtes Kind"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c3c02c0f36ae93d59be5179efb8bae9b318e8adfec215681af4a3a6f83f5f4. 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/DEB119900506.
Mein Herze schwimmt im Blut, Cantata BWV 199: VII. "Ich lege mich in diese Wunden"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86e148e4725e215cce4b0904fbb7adff42eb29675fe75366667d49f0a7f4b8e. 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/DEB119900507.
Mein Herze schwimmt im Blut, Cantata BWV 199: VIII. "Wie freudig ist mein Herz"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa257b8fb844b9a1fa84d6c309991d75471f6b1914bdad040cc65554da1d87628. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEB119900508.
Concerto for 2 Harpsichords, Strings & Continuo in C Minor, BWV 1060: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb36b8c669ef311b2ebee7bc9d1384d557771bd5f264e13106747eab8f42b30. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEB119900509.