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 0xa8670c0bbe3bd72b68f138ded7f16e314b1a6b8e5c60d94f1909d6d65ae9a30d. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/435dd7ae-ec51-47ef-8090-587939fb52ab.json and https://artists.proofprofile.net/proofs/artist/435dd7ae-ec51-47ef-8090-587939fb52ab.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Sacred Concerto No. 30, "Hear, O God, my voice": I. Hear my voice, O God
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 0x520c6d69b6ecb10709c7db824a811e3018772f0caaa7d860596095b61f1c5f10. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0111801 — a six-check JSON result.
Sacred Concerto No. 32, "O Lord, make me to know mine end": I. Lord, make me to know mine end
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b61b1730e7875bf23e33928609d54f0d55e244fd154d901b97bfe5535821d5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0111808 — a six-check JSON result.
Sacred Concerto No. 32, "O Lord, make me to know mine end": II. Remove thy stroke away from me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a11cade15ceb9676bbaec7e292d1248f40f540629c82e4a1246f0fdd70d1647. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0111809 — a six-check JSON result.
Sacred Concerto No. 32, "O Lord, make me to know mine end": III. O spare me, that I may recover strength
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46d03f90b7937731087bd76985571a597ca9b8b376dce01fb2edf7bd3d04f62. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0111810 — a six-check JSON result.
Sacred Concerto No. 35, "Lord, who shall abide in thy tabernacle": I. Lord, who shall abide in thy tabernacle?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f608c444bf6ae2903077a677ce61054266c5aad6bbffdcf9a61635810ce2baf. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD0111819 — a six-check JSON result.