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 0x5549f99d231bb15636ecf6cdc000216285d4933f4ba7b38abc06d808b373edb0. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84418bb1-5e32-4782-9f3d-eca5861f8457.json and https://artists.proofprofile.net/proofs/artist/84418bb1-5e32-4782-9f3d-eca5861f8457.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 0xed202de780f94ff80efbee276b874ae3d71d8a4cdad38e6708697fc44462dd4f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USANG2237974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819d8d86ed09b84617bd72a6b812d577c7578113ab3819740a164e8030465cd9. 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/USANG2237973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627701ed208ffb222af20e0bc905db8726c4fff5ce6224360ea03be7459ccfad. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/USANG2237978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752b29062de4efbcf4e3cbcaa82bcf7150208eb451b88da660c4fe392a008acd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USANG2237988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a31217dc9ffda5013df3e53fe68f042e59d0d92766b96b944fd2c96c35e369. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:25:00Z), 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/USANG2237989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4077184fb76c050b1614e55aff75b1f39b7c16d8c6ab5a077dc95027aaebb18b. 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/USANG2237992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546eea8359c682ece5b3f980fd4c5db960755bbc208218d25a12eb0d3527dd73. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:10:39Z), 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/USANG2237993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fb4f64e8f7530dc53c00ac925dba7b705550733767ea8cb1ba634d26e1c273. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BEKT52200210.