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 0x9f6d66bdc097c3d75501d1e9114d78c74e2b11815e0b6f47ade64613654c3002. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c94a8863-fba8-4280-a52e-86e5ab04f98e.json and https://artists.proofprofile.net/proofs/artist/c94a8863-fba8-4280-a52e-86e5ab04f98e.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 0x2b5a3ad6b8a0a65665084dc5365fd5f20c6d0291ba36d225f4fe7ac88b451e63. 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/USFI88000469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf085f908f64fe8ca7674a86be5fbbd143b03b2d279929c65751baa6f4c4f27c4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USFI88000470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4ebf49cdb5e8362e765429ae801e7fa578d85b8beca744a9b06a1f506ffc30. 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/USFI88000473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b107d2f3f7be0e5773153093b4a77d7fdb632ef8cd5f4691288d885fab218ef. 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/USFI88000465.
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 0x70cbda6575d8f2e26b5fe559a0894000244a2e55ffb4d254dbb9db8b6e178cc4. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USFI88000466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171dfd7cd69a1c469877402678917730924b02ae64233d9d0a71428e30ad9eb1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USFI88000467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30423627da3f796dd0e7891b3c5904178a229805cc59d3081063c58b7fb69b5c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFI88000468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167a7821996d3e73b8def8bc41c59d3323c63daa49afcb36de0b244a3a0939c6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USFI88000472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ebdfb9315d8feb488abd09590b66e35f831dab17594b2de39c63e9193d6a0a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USFI88000475.
Ultimate Demonstration Disc: Chesky Records' Guide to Critical Listening
Welcome To The Ultimate Demonstration Disc
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf044801b99d220a893eaa2ab728600a9551a5d02702041ccf2b98140088c4435. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T22:53:43Z), 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/US99C9509501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3ddc6145e0d534550ea19ca2beae178706a12ac72cc4a789cd0484d511bb2e. 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/US99C9509504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a78f705199b6d1b29a75a12523c4858cf3c73a916ecdb10c92675360c314680. 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/US99C9509508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356d31905ab3ee507cf372b49a2babb10830b0ebce79c52afcd39e6bf09f3e35. 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/US99C9509510.
Best Of Chesky Jazz and More - Audiophile Tests - Volume 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263d851521c9ceec7011472111f5a057f653406e7fe3de5385fa7b59a8062919. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US99C9509527.
Best Of Chesky Jazz and More - Audiophile Tests - Volume 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27edc15de4de554516dfc097d3be9b6ceae25ef5855622f41642439d56cebf9a. 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/US99C9509529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a0f4cb45144d8260ab7679f8fd66c11178ec402ebc8c995a12c99aeb997589. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US99C9509515.