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 0xc7f8c96773d535808107ebb90868da15aad27674b491101ee59e5ba381cd9206. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c5605f7-bbe5-456f-98ea-117694111f92.json and https://artists.proofprofile.net/proofs/artist/6c5605f7-bbe5-456f-98ea-117694111f92.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 0x50423fe486db30c7d9f817dd807faa0906d6a3ba60f075d230b0fca860ceace7. 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/DK6B91500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ecc9e9d4c168b2467b92b2e5c4b502104a9705b1ae9cf3d46e6f78f2628994. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DK6B91500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42460ea1604ef06dd6d7581c10c2e8aed3d5efde9f289af6926e59b4ad2d03aa. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DK6B91500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816e5e81847196c03ecbd2d52dae9220393ab59c626e38e6dce3f1283d7e73e5. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/DK6B91500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe490a3b0498cd946c29ae6182d4bd2b19c09154c9b9a38490ceee1cf28f08d41. 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/DK6B91500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7830d5d8de6e40f0fdb7e77903019786156411962614135043f4c5f2fb2db2c6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:41:47Z), 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/DKF801800402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52520ba1e0e61efef2208d49b070e0d7d337538f80550454030426e2a11d3527. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DKF801800403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ad2149f79def5bbe6b7e22ae9536e8e9e6f758ca0805de9109639df54db70e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DKF801800407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9bdef45796c35f8a4464d2eafcab84be0bed2e0b958cae0c0ef30d6624bad2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DKF801800408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0da32679728cbdbc62d77de12a6261ca4a4efb41c4895f711130641b4534cc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DKF801800411.