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 0xb0be9bfc7df44dc1ed97a612a88b05db8edd326b0404ea8e5e29f94c5749a29d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e2865c6-5ec9-4cec-a1be-1502c2c5135b.json and https://artists.proofprofile.net/proofs/artist/3e2865c6-5ec9-4cec-a1be-1502c2c5135b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mass in A Major, BWV 234: III. Domine Deus - Live
J.S. Bach: Mass in A Major, BWV 234 (Live)
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 0x684dc75ffb4edff62ef5bb362f21f85adc19fe57ae330b50863188d98bc1b943. 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/CH9212400077.
Mass in A Major, BWV 234: V. Quoniam - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7f2692a495638307df7025f08e4b0df2fe12d7dc2bf33cd0d0cef43abf0468. 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/CH9212400079.
Mass in G Major, BWV 236: VI. Cum sancto Spiritu - Live
J.S. Bach: Mass in G Major, BWV 236 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a18f9aa5144c7b6858a631232aef7c3d98d578563da59296f604d1547dc77a. 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/CH9212400092.
Mass in F Major, BWV 233: II. Gloria in excelsis Deo - Live
J.S. Bach: Mass in F Major, BWV 233 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b10f0c455fcd2a0ee3c8e81d28cbd1d45ca8faa19c3275c115d25e3b89089c2. 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/CH9212400070.
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
Mass in A Major, BWV 234: I. Kyrie eleison - Christe eleison - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc44cab83fdf5b1f7f812de823c746f621283106eb6af6c72eea830e46872e4. 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/CH9212400075.
Mass in A Major, BWV 234: II. Gloria in excelsis Deo - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb257792131b3a4129378b6c7557ae2cddef2c971a3d97989ff0fa4de00b30a. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/CH9212400076.
Mass in A Major, BWV 234: VI. Cum Sancto Spiritu - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1fb28dbae16f71dec7072455e6bcf2916e8107e9207a4f3e0ed3343acd2ca7. 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/CH9212400080.
Mass in G Major, BWV 236: I. Kyrie eleison - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e670b8ec3013586ee923dbf61a13673142d1e358e527e7a14e5ebb3496a24ae. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/CH9212400087.
Mass in G Major, BWV 236: II. Gloria in excelsis - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2290248a55b64c7c54b76cb6f3b43a346486c03af386d1fe41029474964af0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH9212400088.
Mass in G Major, BWV 236: III. Gratias - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f037d5a3bc7c118857eaf9d6c4b736d564dca40a78cc95e2dc9b872906e0dd. 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/CH9212400089.