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 0xabf202449574c312e255b83f866b12a180d3a457554e5416d734610d02f89a12. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a41ea8b3-704a-4f6d-aa71-07368dbdabcc.json and https://artists.proofprofile.net/proofs/artist/a41ea8b3-704a-4f6d-aa71-07368dbdabcc.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 0xc05fec2d9984f6d7add283f52d885c53b1a2bffcdc2aee16aee0706e220b67b5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GX4R52482470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8b735c7fd7b845b70468721ef7b448f8becc3eeefb7b43c35f6de574e7d85e. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:15:38Z), 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/GXBDS2446872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e662e20bce79a104da7c518906a67d9abca316a15a0a7c71e68588d8638a34. 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/GXESV2483058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a6c663798e2fff5549b64d77dc55e626a06a70f305ccc9ffb0e0fcc542b519. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:44:15Z), 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/GXESV2472344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a9c7972b2f446c239caff3bc09a6491b0ff6a3de34eea41aeefdb29e27b8d1. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:23:25Z), 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/GXESV2453620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718a3a6180170e73144831460be86ad00202d213f2e69a6bbc4193b91900462b. 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/GXESV2489312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ffae6191912d6849b60918cc675ebb1e04ffb0829d6a3e881f0d6703d20191. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:13:17Z), 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/GXESV2462085.