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 0x0b82bd0265965c7ba51dffd33d8ad5ba50e26327a2fa8bf11901e5819b91ac95. 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/a2169fe1-d678-48cf-9dd5-5a11590a8cc5.json and https://artists.proofprofile.net/proofs/artist/a2169fe1-d678-48cf-9dd5-5a11590a8cc5.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 0xb17c7640a6bc62923d15dc2aeeb348172e3d6796bf7d6ebf292888f9a6a9401d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DEL162050203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acb403c6db96e21bcc784ffb19398c50461cbff659a4ad052a93e1ff767b535. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEL162050204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3f610f1a3e87f7b1dc220de4ac6bc85b2b8b073d697e5530f2288bd82dcd8a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:08:00Z), 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/DEL162050209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa380cd3e6bde8f19f95ba09dd8d5350863c499d3278e0dcb14b964dee46e7904. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEL162050212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d9227036b7182295e7eb7bc005f542dafcf40c52ff57a109882d42f09b56d4. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEL162050216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949b2d415213d382965b396ace4f2664ce6964e19810d9335fbe14cca11dff7a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEL162050219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dedd3b0cdf3b628d06f336a91f2d783b89ea2fe7d9246ac44b3f946e425fe46. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEL162050227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbf23506e765eddc222c47527d2262b0bf20bd0b5ea42bc2ee8ecc47645aa23. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEL162050230.