1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x6138e19e0b25580ae428bad94b4f1386be8f255c9f364244c31de17475ca0e8c. 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/6f0a4088-6d44-47e3-9a6c-8a66c2f16870.json and https://artists.proofprofile.net/proofs/artist/6f0a4088-6d44-47e3-9a6c-8a66c2f16870.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 → block OTSBitcoinBlock must exist at that height 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 0x5d221cc02fdc1e988a4370ad9376e2eb349ee9b18c8c99748868e772ac7d95ef. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAGZ2382758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a3e6cd5a58b0c0c704d5c7789c0d67bbd0df06e9a9e61b93c69f399678b80f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZYXP2300442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734a8858fea76f70f11ced8aa435b19e6de7f7416e5fa7a4e3a806e3f8dc20f8. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:49:17Z), 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/QZZ972446943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c744d7b59923a152e599a070f3989db5f7e7d7672c59f655ad4f676e241058. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ESA012377870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38d3b7d878ed04bc72e5dd90cdd2e810f133dbb66fb99217d8f3885770145bb. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZZ972446941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0f44eaff6ec3c4cafb884d370db08d02c4874a2b0e32fe6d4fcf0ff223145d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ972406844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8f4d7255de894ce2ee64410b23f83a1b5856e58ebb2c0245f8daaba67581e2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USA2B2511373.