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 0x511a16a521224d9702271dd6dcf17fa525b12cac4e01d397b6a67dc1bacc10e1. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb5f96a7-04db-4b72-849b-6ef0a510a9a4.json and https://artists.proofprofile.net/proofs/artist/eb5f96a7-04db-4b72-849b-6ef0a510a9a4.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 0x3a1d26b08d106d9a8b2599bb55e121258854a3904b1d5c1ae2b570685d92fd43. 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/FR8GV2410530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe183d659ce7354b5699c519b6bf2923faff716705ae0629280bc80aafe65b5. 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/FR8GV2405570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9376a20cddb6977f6e0ff32ee7312cfbd8fc1bf79e99bf46c533fdc9d756b027. 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/FR8GV2409820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a50585b4c761cdae8f3191bf063b59c56cccf7fe106a7f1d9350c2b61ae7bb. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR8GV2409830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf896ef237825e7c1647233fd36dc2772e8ed5b31ba09ac8045b93b9b2044c4be. 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/FR8GV2409940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9fdb567eb980a783f3ff274181c739f20894b69e84378d68581d667f11b0fd. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/FR8GV2410700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0a24554363faf9e4412969e380fde3017baedeb66dc46ab3b3ec2535b95780. 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/FR8GV2410750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619db0c79892c8f6c08804c8a04c78fd52125458e38fe1b8eafe195afb465ee9. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/FR0O70788849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01a5b2f9aa54434509d7f40dd837edfea5c0cf16d56ffbbe0b429c6b0c057a8. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:57:30Z), 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/FRX452382831.
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