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 0xc4fae1a87cd23e25c71061c7b231cafc14dbd4115b428780418f133a03138f4f. 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/669e9a7e-11dc-4772-858a-89bf5f62ac9b.json and https://artists.proofprofile.net/proofs/artist/669e9a7e-11dc-4772-858a-89bf5f62ac9b.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 0x013b9dd79ef4e80fc7bd3ecbaacd240fa666bb35fda1f229263714a2c32bc41b. 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/USX9P1067527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ffc837987e3071c422457bcfc81856b8f9208b2e08204aa5fccb48471886a7. 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/USX9P1067519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91116c38674e89cab96d2fb963d68aa60cf34992a0a04b085770fc64f5810a2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USX9P1067520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b6eef7c3892245598c681409318531078ec218871d5171fee7603b7ca3680e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USX9P1067523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4ea49e2745f6e798dd861cd080118e9c792902d4e329af83205a68dfe2b219. 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/TCABO1336374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eed239316a45f514a42741b4d00d92a8c2557b65eb6133cd13081a98963fb7. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCABO1336376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976e3c77e01c9ce7dfbe3e459fe084b7d7143511edd989a2d0ee84b6b767dfa7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UK3Y51300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc892895b6626ada756f6fe17fa32fd88804192b686e22db80b333f67c06eb4af. 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/UK3Y51300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976e3c77e01c9ce7dfbe3e459fe084b7d7143511edd989a2d0ee84b6b767dfa7. 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/UK3Y51300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc445cb92be140a799d02d1e0729f83550a828584d2fe2a04c394f095b2abc9c6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/UK3Y51300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626f6f9be163356b496d2aa4824b68b240c8315babe06fd78b421b27ec3a5e74. 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/UK3Y51400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc66269f825e8339932c445f5f4cba719b80a42f1c3abc454e084312be046fa2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/UK3Y51800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e568c870ad0532ac164eac20b3d5df237e7509a4559e2f7a8e4dc0bfd89cfa. 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/UK3Y52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607aa057e3d67500a6d14cf78516f93e1f1f713021c9070da518cb24090f5114. 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/UK3Y52400101.
Blue (Spirit's Flight Mix) [Orchestral Short Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead1bd646b48f68ce0f8b945033313824bd7694a393be1d59902dabb23488ba9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UK3Y52400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a13729277adc8052c50c56d33200fb8579bbc732d8b42774d96889c42f36c0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/UK3Y51900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317a57d23c98057c6d480823a01ba3b98a39bbefaafbaad3d27e58358c872370. 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/UK3Y51900104.