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 0xcd32c13428a4513cbc88e3f77aff3e0609a70b4cee82bf1ba12d701a719708dc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b28ee4eb-c3ca-4e9e-af52-cb65a4aa8957.json and https://artists.proofprofile.net/proofs/artist/b28ee4eb-c3ca-4e9e-af52-cb65a4aa8957.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johannes-Passion, BWV 245, Pt. 1: No. 12, Recit. Und Hannas sandte ihn gebunden (Evangelist, Servant, Peter)
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 0xe6a332bcb95481039cc3861bd23ec50b54072aba4133a13d15a3a08b822d6628. 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/DEF058630030.
Musikalische Exequien, SWV 279/281: Part I:Concert in Form einer teutschen Begräbnis-Missa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f0dd04734c4eab35492985f1e67b5b6665e53f15b47aab841d5018dc41018b. 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/DEF058703290.
Four Motets: Sing Ye Praises To Our King
Barber: Agnus Dei - An American Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888cd2786a075cd505ab2954fb06d5a1c16fa62af856c1da400337747809992c. 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/GBEJP0503120.
Trois chansons, M.69: 2. Trois beaux oiseaux du Paradis
Fauré: Requiem / Debussy: Trois chansons de Charles d'Orléans / Saint-Saëns: Calme des nuits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd6e6a346747d879c8c37bea1e2e0421f6afc67a6ff56e76d8550ac94aa2389. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLA509110816.
Christmas Music from Medieval and Renaissance Europe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc10aa104f5f7df1fe9e533d38abd70c9f56324d252023be9b1e9233a338d06e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBAJY8726303.
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
Die Zauberflöte, K.620 / Act 2: Der, welcher wandelt diese Straße voll Beschwerden (Die Geharnischten, Tamino, Pamina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0550ff85e962908bbbcaf675fcbdbf7feecfb86d88bd798fcb3e88094b694d0a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEF059530847.
Die Zauberflöte, K.620 / Act 2: Tamino mein, o welch ein Glück (Tamino, Pamina, die Geharnischten) (I)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24ea899c0ce2017030f726cfc2ab8ab945c5832c85b6843bf80633e8c8fbc1f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEF059530848.
Israel In Egypt, HWV 54 / Part 1: Exodus: "Now there arose a new king...And the children of Israel sighed" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76c5100d625655a56916a09a9303f68efafe56b567bad0bb77a0d0fc441f4e0. 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/NLA509005302.