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 0xd8743c806060fe3a787f46de5ba7e7ab792cb02d17a7a86f231faf4131e8331b. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5a2dd41-beb6-430d-9f70-95972dbbd77b.json and https://artists.proofprofile.net/proofs/artist/b5a2dd41-beb6-430d-9f70-95972dbbd77b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Second Symphony and Overture to Frankenstein: The Movie Score
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 0x1975c67afabcf45dda0a5225ae0cc16478ebfc87fc34b2326eb21d4fd060f79e. 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/QM9AA1566723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fe46da6cab8ae4052c5e898cea2be33f24eb8b31a039639a4e9fac924f164f. 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/QM9AA1566725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e40d6d713c9c19d004c2c67f81c28cad91a3137afb2a3e330ad32549186ce59. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM9AA1566724.
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
Michael Shapiro: Second Sonata for Violin and Piano
Archangel Concerto for Piano and Orchestra: I. Book One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308536f510b6917acf4a8cd1f3b02b4cc91eabe9bad2a69b66682a4ab5183d89. 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/USHM81916864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ad33cc3c55669fd7dea5b31e17ea6818b1b55747d1851541ed5daf703fe84f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USHM81916871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdff5e609e78033ff633b97b89300c7805560da0b4fbd5231c016c46d566779. 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/QMAAK2203539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bc17f03bf7cc9642c7bfa4d469d9a732fa97d936cb85ab2eec335c131930b2. 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/QMAAK2203541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec767d3398ec8b14213deb15bf7f86270c01dfb323c2cb095d7c33555984b89f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QMAAK2203543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff273fee5b38baece1a893ee9f7fb4d24015dd6a5cfd4e943f40d3bd2d853f94. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QMAAK2203538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e79551ccfe7f81b66f25fdfa9fb140e1c7eab0d2150772785d08904cb76a72d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMAAK2203540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf102d9f2effbec9285268f79f7893931ff4ba6bac88bc77efb175fe79ef69f9e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QMAAK2203544.
Michael Shapiro's Yiddish Quartet and Piano Quintet
Yiddish Quartet: IV. Andante Ma Con Moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c88db500de46e14c1f6b02fde292681fa7955679f08b472c19bf87244a212b. 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/USHM22482130.
In the Light of the Sun, Concerto for Flute and Orchestra