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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc872130a6d533591c7bd1f36322382e97e0973c83e8147242eeed21f761c814f. 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/6d833498-53df-4a23-8e43-5cc81fec7cf8.json and https://artists.proofprofile.net/proofs/artist/6d833498-53df-4a23-8e43-5cc81fec7cf8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hildegard Of Bingen: Choral Music (Angelic Voices - Heavenly Music From A Medieval Abbey)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316c633629962a0b1a08fee54351d0dcc807de57f3c1bc673d9014246c2b3a8e. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GBCJG0200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633c2be2429b897800eafb62a0f9aab40a8f489dc8facf36e0f0b92e362e7f11. 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/GBCJG0200135.
O successores fortissimi leonis (O successors of the mightiest lion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ef1271e69508aef17c344df57af41c65b95f5f369270b410a80e91482f6cf5. 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/GBCJG0200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf51ac21412e58c4e76fce5559a5239e3be504ad1eba02fcbf455767e3f3bede. 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/GBCJG0200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3ad307cbfaca0a1261a9c8560918372ca74782b846c0e24ec35bd9927397a2. 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/GBCJG0200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fb999d69b4330ed07d68d496aaff5f2d19cfc97cb37270383ce4a3679f4330. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBCJG0200140.
O nobilissima viriditas (O most noble greenness)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05694a4e36460ded7b607f19ccc6007ea09d31c504df3bbddacddfc1a5e88b34. 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/GBCJG0200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1984c6c3b0da003d25e0fdc88f34dc23e671f9b9a35cc728665906e9902b7679. 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/GBCJG0200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0342530f4b44da57e2e4f280361aaac72f27020573e62010615ffe98f4d05317. 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/GBCJG0200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f484089be0732e96f17a9fc6ec6d75ab82c164a0c1f08473e83f627a5c9635. 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/GBCJG0200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4597e8bd60ca81969b9d8e2f7612d5049b764e206f553fac4580e9be7de6ff6d. 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/GBCJG0200148.