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 0xae2d742e723ee349abfdbb0b4998198b62988abfc89ded59a86f0f823eea8415. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d9041a2-70c5-4ff3-ba41-7481d397fe9c.json and https://artists.proofprofile.net/proofs/artist/8d9041a2-70c5-4ff3-ba41-7481d397fe9c.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 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 0x69bd1c71aba97a7bfde5ec56f0255c0ec66cd9f2ca98f7d5a47ef03afed3c863. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USTCZ0937346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50713683f25b4bb523a83b190795fbfaffe9372b5dcb4966dba775c773a05664. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USTCZ0937347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d2998d7dc947d445fe52d971c2394b00fbf09499f9103301c229c9655c012d. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USTCZ0937349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70851825c5776432e5e74e9e7e2b8a86a12356d684c9bca187e1ea534efde0f3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USTCZ0937351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab1d3b460ace583b15009303daf258056fd32887fbcf85bd7d8cb06b506679d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCABA1158971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dda798e4c144566f98c03e44cfa1a73088e4bdc8c77be79270cc476ac2074ca. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCABA1158982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8685a813a55458e5f71815778623bd460406de2f43848b6a14b5d9e98ce752a8. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USHM91200656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fd26be20e57930dde55fb1186ee9338ae1c31290f6c13f5ac89f1f493f36a1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21499460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4113eec825a867a002f766a9b2dbd22e64efb8b04b19c97961d7c9c56e6d5456. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/USHM21499462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64376e9ffd765b9199820adc70738c53b32d13c2708208168370e885b912f77. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/USHM21499464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fecd92fffb6af04155cbddb2d9b4d3c392d150089e2b5e68194e2ba46b1a60. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/USHM21499465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccf14db15d413a172bcef964ccb56f17690a899e040a2c8fd7683407df29ac8. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USHM21499468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da0ffa75dcb92c97769335d06805965762a644e1f9ff76036228c2479f672fe. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21499470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cc793d72d266158386d365eb2b024ed5276198dfd37f2f7f36792b475bcb1c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DE1AH2203208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a930bca43502904622e40872000ded75a42329e212135a58a5cc941a70a80a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DE1AH2203211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417fc3ef7181d8442e802d6b4b09c89a38fab81ca521bda84849908d03ca4f19. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DE1AH2203212.
Roots and Basses: A Latin Ska Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656eea5bcb9597be4648474a120d9e40f1dee157f0f30c06ff65580b6f72022b. 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/USMH92384516.