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 0x232153edb81c287da14f14548480172142131b7b0c11dd973987a6209cfc7f74. 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/f9502b2b-90bc-4b8a-b2dd-5fdf7c0daaad.json and https://artists.proofprofile.net/proofs/artist/f9502b2b-90bc-4b8a-b2dd-5fdf7c0daaad.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 0x11de140c4acec2b6c19fe7b12d2b1e294f1ba093f2348d2ae6701f8188b18bc0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCACQ1658792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e60f7a04a52c3ba0ca310c9abe1c35a18cd74d2451a2c45feb1196cccfbb18. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:10Z), 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/TCACS1609942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a58733bd8ebd5eb8306ee755f546a9f7a050fc3c221f2b8a31a5e18b93f6a1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCACY1761581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a15020b8e2e696053fd83a8b07a5dae79a769d88edc6a5f18ad307d134d210. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:16:31Z), 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/TCACY1761582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62166547d039ef4a33a19524f03aeb2fbb9958b49d75d2b1533e9d38a1a4cdf3. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCADF1748030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3c75e36df968612e631c9e107811eb6ef0b5732e6a2cf1f78ef7705582b6b3. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:06:32Z), 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/TCADT1872021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96ec3e9829abc70daef57fc8d927839c728b15c22661e46098b27aa35f9979b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCADW1872534.