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 0x7d091390729589c08d5933dea6a2a6e886862ea16e675dd56065ffd4dcc7943a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ac81026-5011-4424-ba49-e63dafe49dea.json and https://artists.proofprofile.net/proofs/artist/9ac81026-5011-4424-ba49-e63dafe49dea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orchestral Suite No. 3, BWV 1068: Air On A G String
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 0x5d708adf863ca2a49783dd76b0d156a1f7aa9fbf3c573f9fb485a5abc315230f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ITUM71400647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6ff198f21ed74585e76e62c328a84aa15428d3120b6be4fd2fbf5121c7e0d3. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/ITUM72300341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71883a02ceaeddd9181d911f0338e6e8312da917e56bd44cdaa154b682e2775. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ITUM71300724.
French Suite No. 1 In D Minor Bwv 812: 4. Menuet 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a970808df5fc2e3895ed955d90951c392e54fd2a23e1de70431ee9febda3bc. 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/ITUM70900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04f095c27c5892d28278ffcf70a346bbc73ec72ec3e93f7b0d1f3a52d0d3c09. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ITUM71400652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d23fa084ef6f037697fa780f83f88f439e563c18ac090131e870dc36fdb68d1. 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/ITUM71501109.
Musical Offering, BWV 1079: Canon perpetuus super thema regium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d0aaec29f5dbd4c93712b9644d60ff01848177d4ae79f94ef6970726008469. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITUM71501098.
Ach Ich Fuhl's From The Magic Flute K 620
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e98a342606483001a7d7d0b4800ba83255b3a83df6a3762c95b9baffb1cdb4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ITUM71400658.