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 0x736a650cbf321d8e20fda7b8e0e32458c935fd6cfeebb83ac11e8e6be778cfb9. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7de7381c-68b9-43ed-a6e7-349b509f8623.json and https://artists.proofprofile.net/proofs/artist/7de7381c-68b9-43ed-a6e7-349b509f8623.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 0x84d5bf0f9cf929ee19f97a7275139cb4e644f8c6f00869492aa7d261ae9c7492. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/NLH2L1800274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69db543f6f013aadf9e709b6473a0b08ca616cdd944d131c75dba03b6d2ffcd3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:19:06Z), 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/NLE802000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc94c4dfe0dd99f3f989074443bfbf30831a60a329eeadf060f7bd87d9477c0. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/BEB682000349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ccdb34504ddec3badebad3c4712273ac9136eb84052dd90cc51a41516e8643. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:40:03Z), 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/NLH2L2100084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4652eb14c40c011eafe90fb7f3afa070029bf2b6d1f8dfc0a851efde48b6739c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GXBNP2427540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91434dc3c14dd82ef0ab2ff561e6cbe126fdd3bfbc31b46dc11c653b7661b42. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GXBNP2402887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e26cf454b951722f6a07a5685d71ceb9abfcb6b74acc29a0fe14b42b71d3d2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLE801600010.