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 0xb57a6192289d749ea76c84c226785ffd6a098a686d7a80fef6538e36c8623c3f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/311fd2f1-bb53-4dd8-baed-2a1d9c6a69e5.json and https://artists.proofprofile.net/proofs/artist/311fd2f1-bb53-4dd8-baed-2a1d9c6a69e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 40 in G Minor, K. 550: I. Molto allegro
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 0x0f3f9d345b58b71e9d1062a0f3e396f4065b3c9c923c2d94dbe79f8ffc0449fc. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ITL731505641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53f4b0551c8bbe08e2150a1921deb1e7ea27612724f0debba15d0c74c42cf79. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ITL731606375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a2c8f6463cb33ee885a77ebeb1e358dedd0f31fdeb654b080f110a7da6be69. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:10:04Z), 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/ITL731606378.
Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso - Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77d12b7b078cd40735bd393ef9126f6171ddaafc390a14b0e40a6e111d5f20b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ITL731606379.
The Marriage of Figaro, K. 492: Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9ecadd377cf5e4b66a117fd2df4f36761b94516472c4726cb2d35d8e519794. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:28:51Z), 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/ITL731606382.
IMMA TATARANNI TERZA STAGIONE (Colonna Sonora Originale della Serie Tv)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed66b534dfd86703a65a63369343492c25d7b7412ecbdd9162d5fb48d36130f. 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/ITE322331483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e67b6baa792a42a92d1b193feb0c0a5b8ba58369af4d847684a8555d660f65c. 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/ITE322331485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6279bea13d8b0337a8cef7864b79e1029ce5c2eb44216de279b83c11547cbc. 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/ITE322331486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a01501d6738c9271dd48537321ba3c03f9c1fe3683535e8c5aec39cb689207. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITE322331479.
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 0x69b79e5fbac457ec92871327a4512ae673ad18c91776da4d67785d6bdcfca167. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ITE322331480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc5938ec9169140a43e01af882dad4b114aa616b18bba62c123036e368a91ec. 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/ITE322331481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54121ccf10002c99842e710c3fdd04f1fd2b2b0d90c276fa7a7b2dbbf7c1d0e. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/ITE322331482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a37f27a967b8f7dcb74fd09a1c9ecf650a892b2d21deb76a941110270e4feb. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ITE322331484.