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 0xf50ca1a4832dbb13cb4c689b80295455d9af3b176e613a4437adc78bdf6a4306. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5825ed5e-7f14-4837-adbd-f9f8e546c215.json and https://artists.proofprofile.net/proofs/artist/5825ed5e-7f14-4837-adbd-f9f8e546c215.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 0xc71057e646e0e45bb6214ca4938d2c7ccf209cc7c32f68233ff2465614a11f22. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DES372100621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c26c712ef6c93d5b17a4cebb2723ddd9f3e0438c753a1094a192b3d80fc524. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DES372100619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14829aa87934fae0b43e7bc0bf7854452fe6f353797c1c056a22c2edf5972d5c. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/DES372300913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237827d74c9fd6b625d72155e5476d2b6d04821aa7f979e58878c317c1f37a4b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DES372300911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946d4e27138e326c7ec0c13ae6ff239aa3a72779bde71299a2d9d80962404d1b. 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/DES372300923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3bcad1468c34148b1fc75970c1d69d3ce8d003528a9d55755673d7dad058ea. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DE1KY2405714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3dd4daebeb20610e395974f24cef7027af2e75b7630b1732836b3b1d7c03a2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:42:44Z), 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/DE1KY2405739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3bcad1468c34148b1fc75970c1d69d3ce8d003528a9d55755673d7dad058ea. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/DE1KY2405714.