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 0xd9edf5a22724feb92ea4de1947fd4f7197451aebc64ef0d4a43025e4892142f5. 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/79fc8134-acb8-4a3e-8214-019de0e410bb.json and https://artists.proofprofile.net/proofs/artist/79fc8134-acb8-4a3e-8214-019de0e410bb.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 0x3ee1c50e8b393e5625b5a32a061cf97bc8badbd39f2c7c8acec73b9d662d0a47. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACE1593325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbcea7c52de20180c21db3cd880531a988c8823363c0694e340f6dbd5b4dfc5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USUYG1116026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e6ec6369ec8feb63ea7654f6b46d5ef468afe224460a516e658398dc288c80. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:03:52Z), 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/QZZ7R2414269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9c1b8350eba1b607c0355588e2a103b71cc193ee76f6dec47c47c0c178a5b6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CHF032417864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a2f92fa9896ef6cc0ccba7d5de37407568966dd121b9d0f766afe4c2b7bf23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAQTR2301511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20046baa160e111da109c7cc6da4b2827673c615980c060df10302e293944270. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE62M2119234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee94815c40e06b2a0504c3baddcf837acfa9694b8b62279bfb71bc92161c9588. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6HN2193894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1997d31839890aeb1586aacf34e3d664d62d5c6000fead94e444b304b59b112d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6P2548924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845ab8f645dcad69a912c54969148889b4df6b11e546192c1c158c9119037b1a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:56:46Z), 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/QZK6P2548925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5675890a6102c8d69f1aa831f143d2809241585699d8c42ce88e4f639e7778cb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZK6P2548927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea35f86889adb253c078456384629bbd41e8203f15b1708cc6f343428aadbf0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6P2548928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d60128d7dacc60f2834d829757974fdf159f6e20eede6dd854cbeec10fa34a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6P2548929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84480edcc0836945fbd69629b6a2ba34ecd40a9ad140d688107f164375ffaea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6P2548933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235765e2402f6c85d43d57a58ec04e05aae1eb25a9fdecaf06ae2cb20ece0e1e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6P2548937.