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 0x104804ac743c92d4a9f74c4ddffc1f407966feca7a14a4094597437f6a77cb91. Chain 2 (Bitcoin): anchored in block 954028 (2026-06-17T01:08:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a4e2909-3a04-461e-9135-cdcc3f80ee1f.json and https://artists.proofprofile.net/proofs/artist/3a4e2909-3a04-461e-9135-cdcc3f80ee1f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Sonata No. 2 in C Minor: I. Larghetto
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 0xd3a045543ca8468b43c43eaca080f55ebd13fccd3d036a5d0e4e4e2f4ed511d9. 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/NLY332100444.
Piano Sonata No. 3 in A Major: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1410d2aa5a5042ef3f7646d21c164d2fd7ede9741e7b17527a06721544a278. 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/NLY332100447.
Piano Sonata No. 6 in E-Flat Major: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b465264e227ec5e933615a067f045a3d9fd83229ad8f8cc45fb5b3c4753e90. 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/NLY332100451.
Piano Sonata No. 7 in G Minor: II. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302eeb6aa708baf84143313806bd45f785ead6d0d6470dc0529154c726382636. 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/NLY332100454.
Piano Sonata No. 2 in C Minor: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5b40cf9b12d9ed91938bda9c7bcb3dbda7c0337d3237b9c8b1c47593cf87e1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLY332100445.
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
Piano Sonata No. 2 in C Minor: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b573b8d6365a6a4130a7d9c3a423b6756782a5592f81f963b9c9835a23c9d1. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NLY332100446.
Piano Sonata No. 3 in A Major: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a94b4c3cbc631229c8202d648566f25a13fd81aed0216cb68948c42ac9350b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLY332100448.
Piano Sonata No. 3 in A Major: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d391d75eb15f7bc70c553d8655a381004b3000dbbafa377e8701ee17b208aaa. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLY332100449.