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 0xb9713b101855435dc3967eebc5f1f092c6c4a274cf97c49e37bd4e0ffeb8770a. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdac2df6-7ef0-485a-9337-8a0769abcf89.json and https://artists.proofprofile.net/proofs/artist/cdac2df6-7ef0-485a-9337-8a0769abcf89.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carmen, Act I: Scene & Chorus. Sur la place chacun passe
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 0x8ab60afadbead584263e444010d29f5acbb8f761813c0386cda9ec3ba4315813. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEF058230729.
Carmen, Act I: Scene & Chorus (Cont.) Que cherchez-vous, la belle?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64ae46c1306c4cfe3094982ed9a367dc812cdae0775a30db5f2d0cdf2f68749. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEF058230730.
Die Zauberflöte, K. 620 / Act 1: "Der Vogelfänger bin ich ja"
Mozart: Die Zauberflöte (The Magic Flute)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054174c7bcc6725d21c16cd337467ad478cc1f651d799b9ed95c2909901e2290. 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/NLA508300103.
Die Zauberflöte, K. 620 / Act 1: "Hm! hm! hm! hm!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ff1d41ba7578e7236be4a0de6e380f6e933261cfc48e8824bfc5be8c8d96ee. 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/NLA508300108.