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 0xa112d041bf2c5afb7ecb0d64a3698694d44c3eb9dbd3d2a73d3343df6ae3198f. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/861b039f-bad1-4b2e-8562-8e60e6530221.json and https://artists.proofprofile.net/proofs/artist/861b039f-bad1-4b2e-8562-8e60e6530221.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xd41db1877cd3ec96c747c868f28f826461e9574e92c5c9f60f8d87e903449010. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:26:49Z), 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/USANA0425801.
Sonata in C Major (Weiss) - Allegro 1 and 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7e600037c245868a4af4ee288d26150c3e5a781ee23a9620b3fb0a4b56e2b3. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USANA0425802.
Sonata in C Major (Weiss) - Tempo de Minuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb345330b5d72f8217f897c2d792d61a2ba2243b3be0ba9ec27e4697782a483b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:33:25Z), 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/USANA0425804.
Duets for 2 Lutes in a minor and F Major (Losy) - Allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bac7964777bf4e852c0189131933b2551dcaf1e80b22f0526a93d39441ec7d2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USANA0425805.
Duets for 2 Lutes in a minor and F Major (Losy) - Courante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2a368675b92748d68486befa07664499ad8efbf7bd762312587fcf99b638dc. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USANA0425806.
Duets for 2 Lutes in a minor and F Major (Losy) - Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe392bf57f7c19ee2a6760cc9ccfd7c61591109dd3445665a3fd8669a6416a9e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USANA0425807.
Suite for 2 Lutes in Bb (Baron) - Minuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d2ec9f5a7b577e9271ae50f94a34bac0e1e223b21a5be3f6ba03556f783d5c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USANA0425811.
Suite for 2 Lutes in Bb (Baron) - Bouree
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc76465eaa0b19cce296533cbee030df8f9c21d2370e72718af8e997f116885. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:34:35Z), 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/USANA0425812.