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 0xf6de3b387c32948fd70cc0ed145e4adb51c917f80d03415c345793561b726aa0. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e91b02db-c7e7-48d2-a9f8-744b3631989e.json and https://artists.proofprofile.net/proofs/artist/e91b02db-c7e7-48d2-a9f8-744b3631989e.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 0x6ad287c5e6bebfae81586e00f71c3fa4b796da74c7a8aa029aad1cb306ab0315. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:04:13Z), 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/SE59D2248001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84faca1407e6cbd88723fdcf46d92d05e5144872cb249337afb8ca37f7f9373b. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:44:49Z), 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/SE59D2248002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b55caafaf7152dcc846dfe5d55f1bc2fd5363ca70f32362758146808aaafd7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE59D2248004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b7697b916b2d270659ca3fc79d414542c5781ec2151dcaee4ed454ab4b3afc. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/SE59D2248005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697e94b6c4216cbebb1624ba2209e8cf30d7ca47d6baa7aed47b09f5419b79c4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE59D2248007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2ff803cb4c8ac7753b622000c8600dbb8f50221a91ad4a5e8610feb2cdeb61. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE59D2248009.