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 0x7799fa14f9de77bb65c617c4182556912b764ff3bc47fb97d21b82029f149ffc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/045c413b-3951-46a1-abe9-73c1a4d15191.json and https://artists.proofprofile.net/proofs/artist/045c413b-3951-46a1-abe9-73c1a4d15191.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 0x0f8f91287a3552dd35512379cf3e88ca9799433e23a0e9f27e5cd5f91d4b7798. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNMZ2449305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b1b77420e2fe9121d4feda43f7bdebae55fc759a9512f26b9ad64452125d4a. 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/QZJG52574032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f86b8c2f93b70ca1bd48da93effa654fae9997a7253262f82e0d4b2b1a2705b. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:11Z), 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/QZJG52574033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aed532f60e5c6984a9a028f3c2149785031062b1354ff2d136f40bcebb2499. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZJG52574035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fbd4d8531dc3fd107fef0867a9793b5cabbb900b20da14d11403d15a076c03. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZJG52574036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119af48e5763bade2781d6792e91378d61fed13b3822d111424863c561114790. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZJG52574037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b7c643b029dc9e400073735b6d037e25f3d6972f8cd26333dcfa0ec9a73ce4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZLL92528255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a95b69a00acbf69f924c3a859ef827ae17e4592f5a6472779dcb4fd93c2357. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZNB82530497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cd63fe4df8d3e13dc04c496d78af36481ba628051d2a45b3294235ed4d2950. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNB82575105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c94c77683bd4a906bf33252bea31db35e8d12ed21ad51308991d0409cb0eca9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNB82539506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd87bcf763492b6de7d9988398f0a1c44340ff65d393587444b73b4532c5e09. 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/QZNMT2560923.