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 0x00dd3219cee11b5cf01d59b2b897398e29c1f94c5c9586d5cdbfba8a63e4b788. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9343ab16-980f-4828-9f7d-5927ea332580.json and https://artists.proofprofile.net/proofs/artist/9343ab16-980f-4828-9f7d-5927ea332580.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Four Seasons After Vivaldi (After Op. 8 No. 3, RV 293 "Autumn"): I. 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 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 0x28fcab69f6032994610ceed02dd1a60237318142575dd38cee68b363101c6382. 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/DKFAA1901707.
J.S. Bach: Violin Concertos, BWV 1041-1043 & Oboe Concerto, BWV 1060R
Violin Concerto in A Minor, BWV 1041: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97eab23ace89285dae88f5dc9d28099f13c98991729873fd17c56c42969595e3. 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/DEB201190401.
Violin Concerto in A Minor, BWV 1041: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39624f142f2029d48a3cb75a2f2cf499b7e9e69daa56a2476df4e5be4f1c973e. 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/DEB201190402.
Violin Concerto in A Minor, BWV 1041: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59d85ca8a5fa8f62a04086f6bac40d1c17e0cac1e6136f38592e7bbef4c7f65. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEB201190403.
Violin Concerto in E Major, BWV 1042: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dd83c72108431c97c50e95e3c645f0a78d5940f13275a342fb3b2f3ba6179b. 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/DEB201190404.
Violin Concerto in E Major, BWV 1042: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4180eb0158ec5ceaad308c080ef6eccdbcd3efa4590ddcc7b8b1a79b705548b. 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/DEB201190406.
Concerto for 2 Violins in D Minor, BWV 1043: I. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c5ab7b9e5bbf5945bb63e8946fae7d3a49201ea8d24d2604bc28d2d5e3b9e5. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEB201190407.
Concerto for 2 Violins in D Minor, BWV 1043: II. Largo ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c4ca6d22cc993fca44f8a2c4509ebbe3e33be72c5cf6facea15895368dde64. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEB201190408.
Oboe Concerto in D Minor, BWV 1060R: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2db9ada06631fb23898356221a6fe0b826e3d3f5b4fa08bdd4b989b93bbe0a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEB201190410.
Oboe Concerto in D Minor, BWV 1060R: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a93654ae6dcbf132cd9138ea4ad23d014f1140b587c8fe240c4302914ace8f2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEB201190411.
Oboe Concerto in D Minor, BWV 1060R: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab3d12813c31e524b54517e1e06bc6165c7cd6b5b5519f5be7aac090f15ab25. 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/DEB201190412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d33808f4b5953378454a6f303db5b77fcac6bfb9f03467495c90ce3f4dd87f6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SKA830602401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710b63ff60c14106ac199a8750f343235845fe4c563c1f0568bccdbd55ae5d2d. 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/SKA830602402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b4a322c9c504337f9cab6dd85fd68942422ef1f593e4778564bca79aaf8554. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SKA830602403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaee1dda34731297ffc8db8785e45ee84c812a550adaeb6c2e6501b0664951c9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SKA830602404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90ddefd40c455eead72bec4562e1dfb942359aa40a7ef69d80d965d74862d05. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SKA830602405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edd4dde75147d7b55f7991c5c67a6a8065e935d553ae63fdfff7db8af096df0. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/SKA830602406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a7f0fbaee86bbfffc4a0146c313ca91ddf3bdad0b5e9adab0c3b9595065910. 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/SKA830602407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13bc0f2f40c9192daeed1f6eb30863a8dc8a60bd008b38545c5ffcf8b589095. 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/GBSMU8126891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b810e69069536586fc348a48f8bafea3b8bfb23c81093daeed70d22f4895d67. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBSMU8126915.