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 0xe578294f6a0ef7cef6dc695b0c4f032974d6c5b41459941745e0236c30704cdb. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6886497a-d204-4ec9-9103-c63a7816436e.json and https://artists.proofprofile.net/proofs/artist/6886497a-d204-4ec9-9103-c63a7816436e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zwischen Nordlicht und Südwind - Lieder isländischer und österreichischer Komponisten
Die Frau ohne Schatten, Op. 65 - Act 3: "Wenn das Herz aus Kristall"
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 0xf68d499d75767d5fd036fb9a5585573c2e3ba92b0b230644f8b5882ac699adfc. 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/GBF078943544.
Die Frau ohne Schatten, Op. 65 - Act 3: "Sind das die Cherubim"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dce81ec634f211950b77aaf835f3ba422c18d1cf98cbfa24319ca0754b1c02d. 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/GBF078943545.
Die Frau ohne Schatten, Op. 65 - Act 3: "Engel sind's, die von sich sagen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd573b814cf2041d380f14f4ad4aeabf2c2223d1483680fa67a4a6d98fcbfc7c7. 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/GBF078943546.
Die Frau ohne Schatten, Op. 65 - Act 3: "Trifft mich sein Lieben nicht"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde41c189f293dbb4ce2e98ba43edf26004c20eb88bf1b807916fa6ed063f3747. 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/GBF078943547.
Die Frau ohne Schatten, Op. 65 / Act 3: "Nun will ich jubeln"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20288533ee0ca4f06171c252183397c944d1578fbc41c32cb3f2119107079e86. 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/GBF078943548.
Die Frau ohne Schatten, Op. 65 - Act 3: "Vater, dir drohet michts"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1684a5fb1de9728adc78c9d9cb34523225798a482a2deeab873b3e740c7ca4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBF078943549.
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