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 0x4ca226a4eff4e2f458f927c3b49b84ac124ba6b777315d99fee6b796c2042e08. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efe8f8b4-ab6c-4456-a78f-0a1151252208.json and https://artists.proofprofile.net/proofs/artist/efe8f8b4-ab6c-4456-a78f-0a1151252208.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 0xafce930024a869287ad0f3d7b5bdb164b2980be7b160b70bd52c60f15d3f7b62. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZN882443597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bf5d4bf1d353fd2095d3baacc891d5bc48333ec73e4c755beedec20c9fbc9b. 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/QZN882445821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745b56acda76883856db23a32d7b57f74885b426bd7d1afe1bd3587662e29f73. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZN882507334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a46ac6f68cc72b80b79594403cfc5aba7e315df507fa78841afb6b941d8c4ae. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:41Z), 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/QZN882528573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8a0c6b2487d58bf78c1c64f7dacb76545a39ca55be444d53e0d22ccf7dc47b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:26Z), 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/QZN882537932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a7fb9b1bd7dcb076dba10ce9c2a10df2f365543f7742489c5dd10e3877cbdd. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:46:24Z), 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/QZN882538370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd62b2bbe662d111a41ba14b17538185c62ba6665ff8d0963277b0cedfd094ed. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:41:17Z), 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/QZN882538508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ef011d047950720ec4a8566fb4965caa8d280bd58948c3aa7ac4b3d6cc7d5e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:46:19Z), 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/QZN882547786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3c2ce53a6399f9fef098ca78221cc4c9409b6276c4725ac10e29605ab26d4f. 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/QZN882547188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8e58c39320e6b91537bfc9093d4cc4f6faf6e2f68366144eeaf93768146ea9. 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/QZN882555468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ef3d3f461849418bc05cd4b71df56a0c38ca1ab6721d03454418d604fa7873. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:23:15Z), 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/QZN882563184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b83e268798625474ac9db7c5b2d1f455f604ed09c5779fb81c1f3809a19013e. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZN882574774.