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 0xda756dd2f5bc12a85da632fcce4439c38c9f336648d82198e0d10675a1113b48. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4c76d8a-f1d4-4355-b46c-f64701514f09.json and https://artists.proofprofile.net/proofs/artist/c4c76d8a-f1d4-4355-b46c-f64701514f09.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 0xc1ce0908a4e4d90c6a56bc0f2397a94caa64ad8207a63d88d23eeeb097893954. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR9W12339408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4755ff259d01736fe22b4aa101258c67ff2004ce3bd1e8c18ca9506213e9d4. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/FR9W12445976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d65e3669ba0ba82a286cbd9660ba69f8dfd3b24ed5500452c63ea7977f30894. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:53:48Z), 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/FR9W12339409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328c125e75db64cf6b5e69ade0df471d9a15cf1d0d352b3a321ed8e961867df5. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:55:51Z), 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/FR9W12339407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c410621c61456362f091d51f885eac86be2870a6874a1dbe3a211c5e2ec60d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FR9W12339410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9782683b4747344ad91b0a6b98a76cb44000f747c05b2b14debd63c6e70cf079. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:26Z), 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/FR9W12339406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06fcd89a3e938a3bb08b595bb4e4940d323e315a9a5232284058d0ae4575432. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/FR9W12445977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02aec325986cc4720f6af5d9c9dc2b84b7ca291107d37358175bbd620a555ce. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:35:56Z), 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/FR9W12445975.