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 0x2b0497bd6f7fa86364360ab25138b026ea8ac6efd8a19672d4bbd918e99d7065. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1743614d-85cf-4f7e-893b-f1cddd24846c.json and https://artists.proofprofile.net/proofs/artist/1743614d-85cf-4f7e-893b-f1cddd24846c.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 0x8da06a6d78d3e9ce6af494be4323538d86b8ece9da0108e08a6439f2ff363523. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEXO52492857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b359c3c5ceb255338c8a8bdec881cc07d86fb126a900482a9a386f31e736fc1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEXO52492861.
Lewis, Ted: Is Everybody Happy? (1923-1931)
The John R T Davies Collection - Volume 1: Jazz Classics (CD B)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5032c5487a52606f5a31fd3534a0d1a7c6654a9ab26d9b7a6b3c8ec79b475e9. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USCXG0800584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837e27c00852463b887620079685b15ee16a401d5f5812034ee0a8ce9ab540ff. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCXG0800594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661139aba61d337a5c243f3b695371b83532e318a110ed8d3dcdbca9f4e917c3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USESK0602301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bbbdb5b70a549f7f78d53c679f7589af4009d9295b752647715ecf2a1a22b1. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:51:32Z), 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/FR10S1453080.
Tiger Rag (Live On The Ed Sullivan Show, January 26, 1958)
K-K-K-Katy (Live On The Ed Sullivan Show, January 26, 1958)
All Dressed Up - the Swinging Sound of Ted Lewis
Long Overdue: The Ted Lewis Digital Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e93e26383408a625f6ba2f4bf31ff398a23fdcfcbe292d88746f52b4abe5a7. 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/TCADL1875556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5129634bba88d924027d4a98893a1270b664bf1f9e69a77ab6b92ad0e596b9e8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEXN82257623.
The Great Depression - American Music In The 30's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe334dda643c49700d823322f0142d0d7517656ad714b4c00932f78190076c528. 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/USSM10028248.
Tin Pan Alley's Greatest Hits, 1922-1929
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec233c7f6a6ac2d77d13e041be0e7b4aa4b4bf9ba8c1c032c7b35b70eede9bd2. 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/USCXG1300811.
The Big Broadcast, Vol. 10: Jazz and Popular Music of the 1920s and 1930s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5548532fc38ade7497bc86621a1d3e5271b2c1bdc724d58c93ce8ba79f3cb158. 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/QM4TW1514101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ca155b8e85e8e8496cb383d0c9f9e2e1f85238106aadc57bfccbe279642766. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USSM13100047.
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