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 0x5ce6ced6976cbdcf76bbd4922cd91ab07109f5e93aac45d18ea8d063252f4ad2. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/400bedbc-8e0c-4db4-a9bf-a337c08b3657.json and https://artists.proofprofile.net/proofs/artist/400bedbc-8e0c-4db4-a9bf-a337c08b3657.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vespro della beata Vergine (1610): Concerto - Pulchra es
The Renaissance of Italian Music (National Gallery)
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 0x6fcbc2c3bcebed17bcafee53a989ca8f3a0a899f60a203d2e29da6669fa4371b. 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/GBAYC8400462.
Vespro della beata Vergine (1610): Concerto - Duo Seraphim
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea15301a3abcd23891d0a9de7ef9f3068f7dc8a285e4e3424fa2577d7c08aae. 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/GBAYC8400480.
Vespro della beata Vergine (1610): Psalmus II - Psalmus 112:Laudate pueri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f3bb8819229dd86d116acfc757b4116e10523dac61847162a6980ff8271026. 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/GBAYC8400461.
Vespro della beata Vergine (1610): Psalmus IV - Psalmus 126:Nisi Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37434ae6a32cb56583ccf41fc33cbeedea4913d3de7d4452863c225434437bbd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBAYC8400467.
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
Vespro della beata Vergine (1610): Psalmus I - Psalmus 109:Dixit Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f1462bfbb6c2422fb2777742b6e512cea5e9fb77b6f12b963585b1f43b9226. 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/GBAYC8400458.
Vespro della beata Vergine (1610): Concerto - nigra sum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344ddd41e925a26cd52e2f171558859f5bbb2e8f954c7507b62f79bce7ceecd6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBAYC8400459.
Vespro della beata Vergine (1610): Antiphona II (Canto gregoriano) Maria Virgo assumpta est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9836f5afd89b522956aeedab8cae00df7b93ef00fb742249af52033ede875ed. 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/GBAYC8400460.
Vespro della beata Vergine (1610): Antiphona III (Canto gregoriano) In odorem unguentorum tuorum currimus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3373c431c6466a15dcdcd548484ce105e99913bbd3b3a11b3f74e7af1dc578. 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/GBAYC8400463.
Vespro della beata Vergine (1610): Psalmus III - Psalmus 121:Laetatus sum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1c9ea5e99cda00960ec877d1de7b1d70cbe394f4017c8e3bc4fb6e4aa17c65. 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/GBAYC8400464.
Vespro della beata Vergine (1610): Sonata a 2 per violine e violone (Giovanni Paolo Cima)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09888a62fd4dda22a30ab942b0dbfe2bff3a18a8f7c76770011f0a2f4d4c370e. 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/GBAYC8400465.
Vespro della beata Vergine (1610): Psalmus V - Psalmus 147:Lauda Jerusalem Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fb35a8dd60f57f8f4a2a9eeae540e9ec8e69415ed048f79a87610f52853c6b. 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/GBAYC8400470.