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 0xd5504d8c978c3341f2c7aa28c335f1d5d170d4d7d623d200750ce3038144040c. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c16e0f53-3b9b-43be-bbd9-d4b5b589e249.json and https://artists.proofprofile.net/proofs/artist/c16e0f53-3b9b-43be-bbd9-d4b5b589e249.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 0xbae2dc0e391b083bdf9e608f3d22b5b934d7692a233a7a357d2942ecfbdfaacd. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:46:23Z), 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/FRYAS1006596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f18725956523b73a92ce0689757446d1986dd0e79549c26e33cc23734ffc2a. 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/FRYAS1006600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25879a3b2052bb62dfcaadb3cd6018d4dc8e6996912b295985913c3b9c07f98. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:46:54Z), 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/FRYAS1006590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007f4ecb8788555a8b0d79fed3999cd9a0ec35b55d8dee0ab52c253462b61244. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FRYAS1006591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b4668ea8ca9e9b6cd40ef8bca2e2f2c3a3a974524f2640023f84e644a12ab7. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/FRYAS1006592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bc2613f51896f27505879ac942bc07c437c3d350d449a0bfa7538d2bab20ba. 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/FRYAS1006593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91cb5237b08400e502a83573f0473963cf0de2e8575d2df287f8d5b141b5c0a. 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/FRYAS1006595.