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 0x49298e5405099cc97c139ad84fbbb6adc31187c629a859a52a08e613bc9addcf. 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/dd0fc061-be1c-421d-8103-dec7d4beb569.json and https://artists.proofprofile.net/proofs/artist/dd0fc061-be1c-421d-8103-dec7d4beb569.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 0xa87a9a94e6c36254602bcab0ef515132e01cce5f424202f8920f486a8c8dba16. 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/QZNWY2312665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309c142cc824b56b1032278ce4d959a68227c9b43b36b50e2add1efce8bbb56b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:24:48Z), 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/QZTAT2373919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8949f2279bc26e58f765c61e2a59fa16133f27537d3ebeb77a9fd1b4c134ff29. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTBC2338112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdec3189141d3b164d64fcc65a1e3953bb73ec2a7f1620c910bbbfbdb571531. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:27:50Z), 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/QZDA62444225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eea183e10a0e244d2b22125b0d80fb8878451942be37f30caf44378278467e5. 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/QZES82490499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0892cb5d6ed17fe4c317e2f5addfd2f7be25505916b6b2bd740905e0f39d9ec6. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZWFQ2490214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dd0a89e828ff7dfd38eb79d6c073de20d2245c5187ec4de5caeeadcdd8bad6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:14Z), 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/QZWFW2497688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474a1ee966be6e7a2eb2986e1bb1bef3796cfba4846f05e765f2d8af33cee742. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZZ7Q2481933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02320ee7253d9bdabc276102c7bb7da3574ef0859c69d25d094843400ff5f128. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:47:04Z), 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/QZFYX2576954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb5453c92f008922b47061ee528b60e23ab92db287d64222ef49f891bb43c14. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZDA62501708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2afd33f43673b1cacd4269f5c9c59b9bb4920e78b4df1ddb95a3f449ec0f1a2. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZES92580380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff8c69a686c33bd7800f2654b4b87472e87b808c8e53b1cbe0f0816c1e5e198. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:25:04Z), 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/QZTB62568186.