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 0x82da4f8f52a273ee7617b7dc7a172e77ca3d185ea97e57ac09372679408bea74. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f79276d0-0efe-435f-accb-896b418ae01e.json and https://artists.proofprofile.net/proofs/artist/f79276d0-0efe-435f-accb-896b418ae01e.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 0xc471bfb0271930e97a73b4a3cfe35c2464e7aee9d195964e20d456fe36bd61ae. 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/QZHNC2143243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30aec0c43ef11dece4ce2b54263e3175d231964411bde938a6b8f7b766e9894. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/QZPLS2120865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0938a00dcc9df5e8b47498dd7a87214a59eed21f637b632345d96d2406f0cbb7. 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/QZPLS2109110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1199647b6a839f863bc2886748b262214321dacae80265ee77d0656f4a168312. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:44Z), 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/QZPLS2204442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da7ff1fea793caf13a0501b35ea474763c44e2a068c1289f7256692e41806b6. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZPLS2204443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cb85256359ddb70aacbfb15c31811c47e67706129d12df3cc0c283211df8d9. 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/QZPLS2204444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4b848dfa2c034b98698c4c74c6529fc0faf6ad52a9c44c6c2be1db971863b2. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZPLS2204445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939047255cdea07e201d81edb948ecc260e7b4659bc2d8f7b74cedab0b810227. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPLS2204446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3b55d6a61911b64cbb6d1a54d7a920d500812a3436b07864b9c56481c566c1. 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/QZNWT2315703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d920361dddb6d31d291fef6626686a4e175bc6f832be809899d3e4224d977db. 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/QZPLR2375986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037efcfc5a7421402ada82eba6c76c8b2c1d0e17cb845abc9c1555d507a68809. 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/QZTB92346392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135fc9a51b8dc51c089632bcb26b79abe9b756acb676ea7312288671f2c6c4db. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/QZWFL2384853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719aabf2d109297f8dcb9d1ab536bace5a4aa08805558a259d2ccd21eb199139. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZNWR2425330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa18fc3ad1c29948d8130bd68d513877f780688111184d48d7204394f3619ed8. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:53:42Z), 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/QZTBC2465525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63513d8b8a147d7932d297fe1fe0667a8cf5f98a50c5e3dd97c32a87c9d82878. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZZ792424963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fb112f856e31274c1c46c4c331fcc92b637462f9f0e69d2a4626a1478309ce. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6F2484372.