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 0x7c9000bf96ddbbda785aa418e9436bf5776a886641a375de26b7c6f866439af2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa677600-7241-4c58-a4d6-f20bdb770781.json and https://artists.proofprofile.net/proofs/artist/fa677600-7241-4c58-a4d6-f20bdb770781.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 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 0x05abdba864fa98f0581db851b37fee50b94db9e7ff28ff7ecd04de77fd8f54c0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE4RG2235502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31709065d81690b9e83857272e11b4a83fd8c9f3682ddd9b41365bd1550e1c34. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/SE4RG2235503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a2940074d78091ad4292f303e05ced0b892802474d53e50a0ffbea59e72e2a. 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/SE4RG2295002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1338c459bf192a72fb6d7884ac2ab18de18defd7be7e6246e654b73c70d27635. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/SE6RB2200561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23ff4a0a15dab69ab75711aeefa62c6c39484e1625ea6cd68ed93e70be718fa. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/SE6RB2200560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac9cb89a7a69487d3a96a734a8d75d860d04b658d3bc3bb760228a1a3d9864e. 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/SE6RB2200559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9aca9ca5f9f0b1e7cbacf7b922758a43447ef43f8dab15b6a819f2f6cfc4ea. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE6RB2200562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a4ca1b14e885cd4d51b37e8011f4a0b0ddfe065e8a918f55cde0697cd74bae. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/SE6RB2204848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d199c8c6306292401de30a424c53e93e788a4ded3a575c0197a642e8d86f6c. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/SE4RG2301480.
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