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 0x08aca1daeb5ff2055a78e604112a5c3c5094d37b7973b0d70b15f972abdd172b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44ba9fa4-a512-41a2-a00e-4909178509c7.json and https://artists.proofprofile.net/proofs/artist/44ba9fa4-a512-41a2-a00e-4909178509c7.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 0xc4d4f8fa1d66550dbefc089f46428579ae6d08f19901dcfe22af1fe9f9d567f8. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZMHK2585418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58ef2a853a7ec8e1a839de117800fa4a1f60a39d77cac83d8d03c2771b7f2df. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:26Z), 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/QZS642553109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4bf045baaee7907ffdf989c23b87772975a1ef48d4d792ea2f681af39a3d07. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:34Z), 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/QM42K2554148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e7ab38a61e9d151085bffd12860352b62bfe916c0ad668bba1db9b291a52a5. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:39:44Z), 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/QZMHM2539412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857ee1f4279dc6e5dff99fae3afdbb23a7910f445bf7702c3155a3a57cc48511. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:29Z), 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/QM42K2517039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5da70d3e066be1e370f53afebf32c3b0a80a9c3311456b6ab692f4301cd447. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM42K2565808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cec9856f45f68eb98cc1eecedb898933f88c147bce81d74553e93811ce4172. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM42K2517078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24dd722bff252e1f563aa32fd5512e1858cb197972a2cf6581e48a497ec9eaa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZMHM2525950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2492697534ab12b230b0801d54b4f35daba73c86688d3274e97cf753305045. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZS642561309.