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 0x629da086af36e41e4580fab72ec78d7cc13be8ce507ee05f4c6ba0c3678de55a. Chain 2 (Bitcoin): anchored in block 954028 (2026-06-17T01:08:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a4905dd-b92a-417c-b681-1240bf83cd45.json and https://artists.proofprofile.net/proofs/artist/3a4905dd-b92a-417c-b681-1240bf83cd45.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dies irae, LWV 64/1: IV. Inter oves locus praesta
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 0x6613204be91f71f795c0d1f00a5dde4af802d9c4be8d3b1a8807bfbc0ce6f057. 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/FR9W12033448.
Vespro della Beata Vergine, SV 206: Laudate pueri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee5527006b453347c40d1d28a4a81a6e277d3708b0ef5785183ed09bdd0526d. 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/FR50X1855209.
Vespro della Beata Vergine, SV 206: Faux-bourdon Nisi Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc614bfc32d6bf2d8ac1339429f92c0644d40c44d0ef6449f3073df952e61394d. 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/FR50X1855216.
Vespro della Beata Vergine, SV 206: Ave maris stella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ffab65c5bc1f60c098f12d4d7daead748d00b5b5f73d04de8aa352c1dc5a6e. 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/FR50X1855225.
Vespro della Beata Vergine, SV 206: Magnificat 'Quia fecit'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33c7c9cf23e148137158783f4107d27b19ecdfbcaeed8fb43c5adc7c3f04187. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR50X1855229.
Dies irae, LWV 64/1: I. Dies irae, dies illa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1e6d3e1e3b5a9a344bc5ebbae501bdcb6dccbe4c2a738a9b7d603325932e40. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/FR9W12033445.
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, SV 206: Faux-bourdon Dixit Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbbf12f47e12a4a5472052c4aeffd510232713e9b31cc98bb2dab2bdf8d0179. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR50X1855204.
Vespro della Beata Vergine, SV 206: Faux-bourdon Laetatus sum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c80845be7527ae984afeea86680ab00f07b8bfaa160132877f4d928247fd6a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FR50X1855212.