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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 0x5b5eb23680545ee1b3c021b406324b53ca32e3936537a74c56030477eb07fae4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b344a926-f336-49dd-8dec-afe4f3584209.json and https://artists.proofprofile.net/proofs/artist/b344a926-f336-49dd-8dec-afe4f3584209.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 0x0c20ac1f094246a7fa12672c998f058fd02e2ba004941c48d5185b53e425745b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCACW1738483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39de073ce0cccfdf700d322b6be3b1912cdee6f0eb11551edcebb06a47304da7. 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/TCADI1731949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b4c8a2c0cd296f21675094e09fbf999398c502e2179d498b0d1f7b0f8e279e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCADI1731951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054f20b246b31ba79a0c76b88c0d829f572d1611de8af8ac92380ab8de682a94. 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/TCADI1731955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349278e49cbdbe9fc964ef2668eeb32a0deb7b0ab0ae1ca42a295687713f980a. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/TCADI1731956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd34dfdf675b81fb7c137b5f25f33fba995ef3c3ca6c68b95b2845346c07563. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAES2007661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3871a3d1c422de5999f16cf58068ea9a25cbc25b0a30fb720f5a14512692a8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAJH2502729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdc6a74a2d8b81d223d491f9ce8c47413de48b50990ad1669f05bacb6e50772. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:46:49Z), 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/TCAJH2502777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb17d33c1dd8e203f7762fd99f5a02f2c38998dc2f8a1949cd69eb5f1cfc604b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAJH2502835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db4db2d359b7ac2c4a9ad5bdec67314d25ccc6b9e63f4e334b82fc941680ebf. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCAJH2502870.