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 0xa64598ab54f7efd1a811d75f66ce49fd0cbd82a70a60fa9b7b061af138d0da2f. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ecb0316-27f3-4a2c-8be4-299d5bcd790a.json and https://artists.proofprofile.net/proofs/artist/2ecb0316-27f3-4a2c-8be4-299d5bcd790a.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 0x9e94e87b91abb78f4fcc53b5779976175b89a100d1eb30a9836fe30f451d8480. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3EZ2546611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadf18bc54bff6c408d4d1ca468d86fb7b4dd9da20d9b623a3ea8fffeabd5b74. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3EZ2546612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5aeff28513e3384a7969944f094fca6bbffd72fc46ba5fbb50387aac8d05d8. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:48:43Z), 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/QT3EZ2546613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e85fca9da32ef8bb1984de0f91583e02d370ba404ffe5a83f33d911f583d1b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3EZ2546614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccba163dce071a472c2ecfc34bbc9a868d54b93cb1f4c7480b646f15c2c9a733. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QT3EZ2546615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ff4dbf2bd2784b3dba2aa4dd2339e72cf9e10b67faa235d2b32cd80f93ebf4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3EZ2546617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999fdbbfbc576408c8d9c279582a8763e7a228782ab516d51d06b828ac4d2f83. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:24:45Z), 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/QT3EZ2546618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96c74641e856829abacce03072ae706a48d818657548a3d0ae7d50b9517bfee. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3EZ2546619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faa13568a93e6ca6fcdc6b1073347e8bd41ca1ec5f1f45ebbd77a1ebf8b0d48. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3EZ2546620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0cde76ec6598034c479496dccc67694c2ceda57c3ff3d604945f24e1b59313. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3EZ2546621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b17cc5f5696a02d44fdf0f0983249feb3fdd67f57fe3de7c53484eb5f4d0ad. 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/QT3EZ2546622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac96453715aea29b78db6d903751cfb38de05c3905e98251679e18a3ea7e3cfb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QT3EZ2546623.