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 0xd99131f57a35aa491d140da56e551a42930ae9eec28cd5ba9e00274e167bbf43. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd8622bd-8151-4121-838c-f9a89470c225.json and https://artists.proofprofile.net/proofs/artist/dd8622bd-8151-4121-838c-f9a89470c225.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 0xe2e11b123d5b60649d848eea13d8d2317e55babc82497d109c035be871553f1b. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/NLR5C1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfb9df50a63309394986d4571654bb57db21872ec8e2416d624f1ae4d1af1e4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLR5C1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7083efea2b700202900d6410f8c60a073e73683eb4b6284a4ea4556df7302632. 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/NLR5C1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16c4914fb481a26a5534a4dea2fc330154f0152a87f4790d17223d6dd0f5290. 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/NLR5C1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8379ea9cb2889d9faef886418be183dc75846656355833d430a17cd0ab0e232. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:35:09Z), 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/NLR5C1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa115a1137518a07108da81e7d98c2eb00704c9af169e3efbb5921dd0e15c3121. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:05:59Z), 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/NLR5C2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d35955f0a955a759b286612a2ae105122e611ecc3a3cf3ed1be0d19142281a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:24:03Z), 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/NLR5C2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81e03c285cd1417d9bfd35c474166d0ec687e35c93eb61a800ff93b9d017dd5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLR5C2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fde2ad89b6174150457eb0989c51849094622ba154c0bdda7a21d8aa43d0c13. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:40:21Z), 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/NLR5C2300009.