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 0x32175b7f82eb0499b950fce681142e6c5506cbc1bc3255c76e89c70cefd2b615. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38eb3a5d-a6d0-49c9-a758-96e18a001ce0.json and https://artists.proofprofile.net/proofs/artist/38eb3a5d-a6d0-49c9-a758-96e18a001ce0.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 0x248c9a689c95b8b512893a760d584695c3cca85f0d152ac55b1b51ecb146ea43. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFF2542082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64774162c4321f9134dd0d13dde6257f166c47c1b19101ce218d2fb88dd807f7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:09Z), 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/QZWFF2542081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3497fba4b560e7b31af5a7e07fdddeca239087109634690c3d11b795f9a462. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:48Z), 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/QZWFF2594194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2efbfc56563e1d9067d3846d8f34b57b699c32d6734be0997477b96fb4158bb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFG2504111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210815a492bc63c1e085f10f79d866b06b0d8faf3c178c977abed80a39b09282. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFG2508813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e63ab1c8d375511552da34b460fefc651f1cd9cb5d0ce60af707be83d67090d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFG2506202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ea45c1c4e15376c74c59f6a49b6c20ecfb3806659c3f015415678b5f0c7400. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFH2522901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50d64e1af8066288ac89eb526efbb56008b56af26f36fbddb008ec47c614dfe. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFH2520246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79672c4bdb3ff3e2e9b8b1edb77db544a12c553670bac718e138462f7000c23d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFH2582252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfe4fa378e00cb34b7ce592c6fef32eef990f6727712afdeac1cbc92b6efdcf. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:42:17Z), 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/QZWFH2582251.