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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 0x95a55546e32f77e909cda936f3c710eabae481fbbbfbdc883d4ea12e5126ab37. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ee7cf13-7402-4264-9c56-9980fd9dccd1.json and https://artists.proofprofile.net/proofs/artist/1ee7cf13-7402-4264-9c56-9980fd9dccd1.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 0x66b31031228218b5c6559ca6acb8a18f4a6db2c7acc648baacfaf8e2c236162c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAPGR2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fa1a61c668a2e6a8efff847d39c3138df759169fa572335c78de2966c1a538. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAPGR2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab9f9409ad126dce14abd98898bb5b6c564083b6f00cc4ee8f45b925e8ce05f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CAPGR2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58c205b0503fc7ee3524edfa8b3218ec6535a7add50289b357211f482a7e91d. 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/CAPGR2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff2f6dd49a30d61b33a80ad89383b6f4f4148ce3901c9a1a8d1e921341f2cfd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:06:28Z), 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/CAPGR2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1a6f69c159ab28eac7a38ed2ec338bf8d86218862feb6fa2bc5bfd5943a4f4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAPGR2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6be669f7bc9e9c64017eb5bd331cecfa585aa0454efa3f817913b7e634468a. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/CAPGR2000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb02e1a6c38b5bcb3b5678cd57c29bd2c4b8ef6421456a4f3ff0e1f66def9fb8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CAPGR2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d5d1d2d5793dd1e75a1aa22f23fd3ffc20ec7c4fa1b1e6e8bfe2bb253aba0a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA6AG2200014.