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 0x1df812ea1ec8f2e85ac9d16367732907d9cfd9f46e9a0f6d728584d84fd1b45a. 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/80abf171-228b-4f0e-8fb9-f853fc2b1044.json and https://artists.proofprofile.net/proofs/artist/80abf171-228b-4f0e-8fb9-f853fc2b1044.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 0xf434a61e6654f9ae3f99ccba5e6b9562a125e72f9c6943717abffb5b40bbcccb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FXR592300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab3f7e9344ea29ac7cb82a52340f465f931bb4dce9c9d0cf7928fc0642c329e. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:39:43Z), 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/TCAHO2321172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659a95ebe8eb90d29140d88c3a8c262edef1ad0831be66c1c3a7dc9a3ab01a35. 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/TCAHR2390219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298182519b585f2e30797a038ede62456b425660fba3e8b2bd9f9f355cb83b82. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:53Z), 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/TCAIA2400947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c55e21cdddb5e65d4d84ef2c8913af358d2f3a0a5e70418d827271de918167. 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/FR9W12434543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43c3b68a46f314ef7a67def84a8b9fbca133b9486816a423eb9f940bc4d8c26. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:24:25Z), 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/TCAJA2467395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a00a0c19a6df076fc4b08a49974f6aeb1cd1b6793ab725cdd3d66f8966fb2f. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:46:30Z), 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/TCAJF2558798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c55e21cdddb5e65d4d84ef2c8913af358d2f3a0a5e70418d827271de918167. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FR9W12434543.