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 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 0x17ebcd7d3c7004759b5487bb90332a77faa6eefbd7fde6d176d6137c4e489088. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d60b468-9da5-4f47-8c1c-d6781a3652df.json and https://artists.proofprofile.net/proofs/artist/9d60b468-9da5-4f47-8c1c-d6781a3652df.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Clouds In My Heart (with Duke Ellington) - Take 1
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 0x211a243a3def0166f8a40a708f3403b7849d6d86b144df5d32e12bec717b81fc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10407840 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339079724a4bcb9b6bc55d13b1f112d64650f5d02a02943fc604087da5a51d3d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM13700177 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec476c20f8555eb4a47702c8c29b9853894a4e1f370df1fb941a7105f6d0a326. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10024445 — a six-check JSON result.
Moonlight Fiesta - a/k/a "Swing Alero" & "Porto Rican Chaos"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71280fc2c0da83abceffde4c4c0fc08e2f5df12f7932fa7cfd9039b782bde762. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10020522 — a six-check JSON result.
Moonlight Fiesta - a/k/a "Swing Alero" & "Porto Rican Chaos" Alt. Take
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847673fe2d6f600339f7d3294a54a53d628ddfb373f624e3aadf3cb21d88c1ac. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM13700178 — a six-check JSON result.
Sponge Cake And Spinach - Alternate Take
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b6cff61ec8744f8f74fbe3fdee1464e31948a43531280c3e228b705e0737b4. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM13700179 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ae4b0cc69026089553251c410d7600a1956f9be7d41054f9003428fa2281f2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10020523 — a six-check JSON result.
If You're Ever In My Arms Again - Alternate Take
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcfb2f60cddc6437f049c24e473a1f057e51380515588ab56e8bd8646f25505. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM13700180 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3d4517c78ae334155aaf5dc73ba9f9d93256a20f6fde1a921f09cbc50c6412. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10020524 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211a243a3def0166f8a40a708f3403b7849d6d86b144df5d32e12bec717b81fc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10407840 — a six-check JSON result.
Clouds In My Heart (with Duke Ellington) - Take 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff21c1d87ed36415e03f416ffa91ed57198a3168f840267433f2710af93ed5d8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM13600143 — a six-check JSON result.
Frolic Sam (with Duke Ellington) - Take 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160371a802ba651dcdc7db298bf940b4785c8863fd36dd233067f8b73c17ff12. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM13600144 — a six-check JSON result.
Frolic Sam (with Duke Ellington) - Take 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299dc5633ebe39bbd6986934cf05b946222d21e154f1ddb2ba03070613d91a4c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10407841 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb126183d8785ce83533ff48907d77692f7186d8c1c30d18a1cd2b667493f2495. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10407842 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48667cadfe75da3296855369784a34befc5b6cd6f522949225ffb49d0b4c1945. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM13700154 — a six-check JSON result.
Stompy Jones (with Duke Ellington) - Take 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6e0cd12c9076252b6367d2859cb54a1e32516201ef95ad90e664dc1f1a4ad4. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10407843 — a six-check JSON result.
Stompy Jones (with Duke Ellington) - Take 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070361d416086b905b7d38a5605455d3f26286144445f4a27781d0b5ec603ce6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM13700155 — a six-check JSON result.
Lament For A Lost Love (with Duke Ellington) - Take 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ae7f860c6525acda8522ff27226b34ece350ea97914bd8960aab77956306b9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM10024439 — a six-check JSON result.
Lament For A Lost Love (with Duke Ellington) - Take 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1de630a975203e1337975da95653fb9d3b05b25d32293f5a5f14e17acaea93b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM13700167 — a six-check JSON result.
Four And One Half Street (with Duke Ellington) - Take 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6749172cfa554d727db5cc1eec8f1318671ac1962ecf8e7f02581340d451d733. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM13700168 — a six-check JSON result.