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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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6addbacb64bb1787f509aa7cffdde1c7841119f3f383c75433336638e71393e. 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/ef105c97-67e0-47bc-bdc3-09b3b1d63b37.json and https://artists.proofprofile.net/proofs/artist/ef105c97-67e0-47bc-bdc3-09b3b1d63b37.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I Will Knock You off The Face Of Hardcore
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703ea07150736e551615878a6f06815e22f895d34caa4e6f43675b9c85286d1e. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/USHM20772202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c4c3b56aa14d28a9ebfa9f3724fa3f894773e1cde04f7884f72825ac4bf05d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USHM20772205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabc9573476baf28ff984c2b3ac02f7361aefc4663d1e1c5b50e63e1179b1775. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM21825683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c8e2ef6cb7b604801fdc90d46740715b0fd7791fee6905111078ae9556aaa2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM21825685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f5185abd19bf7cb99d85ab011369d69f5914be95bc74f36eafcd21a6ed0c4d. 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/USHM21825687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f170c780711d2cb535e560c54c38309f26abe78557373382b32489564ff8eb. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USHM21825692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1650e0f4df2e3dbb8226add53dbb4197f59f0a95caaa9bab87377c9786241183. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZNWU2045705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c2404f556e0a14bc936e2b4d2b74ccec67f0e19a8b00e6ae07e4df561f3313. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FRX202244883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb3c893b6d7fed094017185d4dd6d248e757f587f690b26af9eac8ed14923e4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FRX202244884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae636dea89eda7f4366821d8095c7e8cd1206ada59a7eaac1c99c18a2a92bc6. 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/FR59R2228557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7f3816a66e5f466e4f30d137b60bbc3d924e665c8b6515bc28599ca991d8a6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX202244888.