thumb|The court of the Durrani Emirate of Afghanistan (James Rattray, 1839) Emir (; (), also transliterated as amir, is a word of Arabic origin that can refer to a male monarch, aristocrat, holder
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 0xbdb0565bbdeb00213d7436156d67a8661231f5f4cb5a52050dd1671f0a198cc2. 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/fa604e96-6106-4a6b-9f99-3ac0ffd56e36.json and https://artists.proofprofile.net/proofs/artist/fa604e96-6106-4a6b-9f99-3ac0ffd56e36.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 0x20d4df7d9e8920a9f3fee7b4be01f8ec9f59ecc30640f9f2245c9de75e69d910. 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/TCAJC2437014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99419adb7d63a50806c785ab32df34f5eb7393b9266fb444ad803f02a825bb13. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAJD2582410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84aedc95c44f63d6a85d7282b35cd05293dabc865453d6a3f84898033a4e093. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:52:12Z), 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/TCAJD2582425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa369a512d599e27dce9f2f6476e4d3e784c9a53e08eb059f22af05b134ae442. 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/TCAJD2582446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22bff3f52204ced40494540681f310814dcb92143e7f8d93e531959b31ce015. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAJD2582463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe458aa1516cfbed9377329405f28921d3b5019d3e61940e81f2e165be9f55da9. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:04:48Z), 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/TCAJD2582495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee3ed632097ded2e6175004de22ce36cd64af798444abea019c1b5595404cf8. 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/TCAJD2582501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0f649c3f6d045f28390645703841a674c6976a4d0b78dc520574fed38cc404. 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/TCAJD2582519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d4df7d9e8920a9f3fee7b4be01f8ec9f59ecc30640f9f2245c9de75e69d910. 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/TCAJC2437014.