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 0x2239ac76bb95516a99e1b47e99c89cb541e1a42e85c628d8abac3378a8023a48. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36d7a37b-00dd-45dc-a992-c95e2b681170.json and https://artists.proofprofile.net/proofs/artist/36d7a37b-00dd-45dc-a992-c95e2b681170.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ave maris stella: VII. Vitam praesta puram
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 0x1e18338fb43cf4a7f99a3ced4a9e7f0f132d51559d3801529a2926dcec4b3505. 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/MX2831000360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014ed278b9d8b0cfdf808e179486b29514bc411fb13d538f364de0134875b4c5. 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/MX2831000367.
Lamentation: Quis dabit capiti meo aquan?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae744274be1ee97ff6bfb1a90d5c304329060e6de88fac61adf516c22621d7b. 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/QM4TX1777237.
Motet (Contrafactum de Virgo prudentissima): Christus, filius Dei à 6 v.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50eab08a9297d269ed2a80fda0926d55ca50ada4689e23196f0c45078a8956a2. 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/QM4TX1777244.
Erasme - Eloge de la folie (Version française)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1c9a1a37917dfcbccf5498d6ad2b5f8a28806f91fd91be26ba8844e75beb15. 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/US6R21347794.
Dulcissima Maria: II. Audi nos, Sanctissima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60323a11604725a31a4888a4e6fb2d21a5d0c37b3c0d0b72e69ca1d8c570ae6f. 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/MX2831000353.
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 0x75d83b269ef676e75b476406045dc8c61da28a746538a86fa99c8d96212cd8e0. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/MX2831000352.
Ave maris stella: V. Monstra te esse matrem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1350d496f7b48fe7709b13cbded2ddf495bc144dbcb282ee7d8ced620255bf. 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/MX2831000358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800228a7600db54b12936a62d646cf75fd571023f68671a1b09b81a2cfae67e6. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/MX2831000363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1250a064c2b689b05e4ad8fa2e5df50e306bf52efd3ebef6906ca4925aeec3. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/MX2831000365.
Vexilla regis: IV. Arbor decora et fulgida
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b016edf862478e4da42c21c777229588ae6f0c6025048d07e310cd68daf1c9f. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/MX2831000366.
Vexilla regis: VII. Te summa, Deus. Amen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e6cf0c30616a7c99a7efc1cfd9d14aaead43a478d66e3148b29d871712bb5f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/MX2831000369.
Clamabat autem mulier: I. Clamabat autem mulier chananea
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7186d4efe3d1601d00215ac0d478ee1ca2ce8bfd33bc34eb7acd6b3e071eb316. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/MX2831000370.
Clamabat autem mulier: II. At illa venit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c2958db86fabed1a10923bdc7768a493aefb20f460827fa0dd642fcd95ac9e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/MX2831000371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21f248aeaec376773e9e1e49fae823c5c34073546c1721a6b02e4fe72624470. 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/MX2831000384.