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 0x86cd933801dc0ac8f4f203a40871bdc9737008f5a769481113992a5ced34b389. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/524476c2-81c1-43df-8a80-cbc729fd7b2f.json and https://artists.proofprofile.net/proofs/artist/524476c2-81c1-43df-8a80-cbc729fd7b2f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Romance for Violin & Orchestra No. 1 in G Major, Op. 40
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 0x0d2ee5ef63d623801423fcd88a00e1798e39e947ef2df73e19b08a5f8f9a56f0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USSM19605714.
Antiche danze ungheresi del 17. secolo (Antique Hungarian Dances) (arr. L. Lences for oboe and orchestra): VI. Chorea
Ferenc Farkas: Orchestral Music, Vol. 3: Music for Oboe & Strings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d51a51852ae049cc0b6ec0ef9d89ccb7d361bc7a62e7e155c67b34bb4f3ff8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBJZY1521706.
Antiche danze ungheresi del 17. secolo (Antique Hungarian Dances) (arr. L. Lences for oboe and orchestra): VII. Leaping Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2c45c9309b480b557fb220c60ed092937fac7e6b92f3dbd8b5f2db1194b665. 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/GBJZY1521707.
Antiche danze ungheresi del 17. secolo (Antique Hungarian Dances) (arr. L. Lences for oboe and orchestra): II. Slow dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33aa2aa5ffefd04fbeb4c000b496347195e9c32d4256bac005520cda3652f9c4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBJZY1521702.
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 0x8f497cd51756e14754a50646dac048b1616e03b666e9a8333af1e02a54ff34c1. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBJZY1521716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f6d2b58081ea49deda2dd7648e998ba5f8fbb349f5f3442a3ee0f51b028ad2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBJZY1521717.
Piccola musica di concerto: III. Scherzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edc5cf6ee0fce67ef3b42a9a2e104140ffd5b9bf60100188772ac5b5d6c7944. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBJZY1521718.