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 0x07cb27df513927fa9b8606e4285bc7f245ea230534735eeddf81f5923f96bd6b. 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/df89bc02-b5d4-4d7e-ba20-64a7581f0684.json and https://artists.proofprofile.net/proofs/artist/df89bc02-b5d4-4d7e-ba20-64a7581f0684.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 0x77c0f3e162afd455fdaad3797f48f354d360480c47f7d671a957fb5229aa5ded. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/LKA000006549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8bf5d2d7886dadc22c87cf4bfa4fd06cc57e5cbf73be225879f087c867ae83. 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/QM4TW2206507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2494bb44b31e44f4f92c22bf1cc5f7ab07024892edf0a02fc254421ec212e538. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QM4TW2206508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b30555510ffe1af185d586349925a9bc07f65cb0cf5f4884818e2290280df8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM4TW2206511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89ddee977ee071f5e417f1b46300c093551a2350dac5601bbe55fe8305e4dea. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:54:00Z), 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/QM4TW2206514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf948db6235fde14509065e5e726825d63ea4f93348721e77e47d5d8e73f40a3b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:04:07Z), 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/USA2P2423637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccee31cecc19a9f304c6e60f8404ac503a416109e7d26421e3388d1904da7189. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:22:04Z), 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/USA2P2423638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056ee6af030c544569ec0a3acf9459e384d5874ac23e64d77cd14d2a71afe4e4. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USA2P2423639.