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 0x1d5a059b1f7275516f8b481eb7de8b4ee268bafe2fa306dabc0e4111f199f297. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bfe65de-8664-46c1-9d54-070f40f2c56a.json and https://artists.proofprofile.net/proofs/artist/7bfe65de-8664-46c1-9d54-070f40f2c56a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 13 in B-Flat Minor, Op. 113 "Babi Yar": I. Babi Yar: Adagio
Gentlemen from the Choir of the Concertgebouw Orchestra
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 0x28555557ebd9e8ceca2b39d3485495b8cd1d96ef8bc097aa9530a111f1cef069. 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/GBF078410291.
Symphony No. 13 in B-Flat Minor, Op. 113 "Babi Yar": II. Humour: Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839baad8e104c2c97fcf780e9c5233bda51d6ec9f7b41ca1a74689aa844e2dd4. 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/GBF078410292.
Bruckner: Mass No. 3 in F Minor, WAB 28: I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6250467c378c549b5762efbc8c7c83e692d7e24b9a18ef7e56d8574d4325778. 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/GBAYC0301583.
Bruckner: Mass No. 3 in F Minor, WAB 28: II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fae9ed2f2fcb2e3290100cf6fd336b6968bbe41ff9846fe6c33dc2ac1a2cb34. 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/GBAYC0301584.
Bruckner: Mass No. 3 in F Minor, WAB 28: III. Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7caa22db078c9e7e20e9c9b71534fd02a4c145bcbba1a0e0c237e6311e44fb76. 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/GBAYC0301585.
Meine Seel erhebt den Herren, Cantata, BWV 10: IV. Aria "Gewaltige stösst Gott vom Stuhl"
J.S. Bach: Magnificat, BWV 243; Meine Seel erhebt den Herren Cantata, BWV 10 (Elly Ameling – The Bach Edition, Vol. 6)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b575d950a086f4ae002661738d533c4072aee06f40dd33aa3fa8bb5c50f570. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBF076812104.
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
Meine Seel erhebt den Herren, Cantata, BWV 10: V. Duet "Er denket der Barmherzigkeit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258bef1fbdaaef26bffc9076d36aa6388fbb8776d4fcd293cc6bd3ba7370d59c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBF076812105.
Requiem in D Minor, K. 626: I. Introitus, Requiem aeternam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32e10816b698178854a1264564c5ff4e5ccb1fdf34f79552eaddd38f5688597. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBAYC8906366.