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 0x4d741751b41b6958eb5ac38824e20692cc993d5de8651a90eed69e3a442aaa26. 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/a3da6ade-be40-4282-974e-48faaab9c200.json and https://artists.proofprofile.net/proofs/artist/a3da6ade-be40-4282-974e-48faaab9c200.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 0xf389d9916c21dd08657002f8e4d6e94c30b446ed7351ffc19cb2116db14e7735. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:05:05Z), 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/DGA072386003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9249c65332b61935d254772836b634580b1c607456fabb3d13401888cfd541. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/DGA0M2304143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d509b99353bcad16d6eb68f9a6229857b3652b48382728cb4dce4940cf0bbc. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:43:13Z), 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/INS9W2300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290dcd8b36667c83b8727f8ddbe2f719e7fc39419abda40da4d92dfc93f2012e. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:59:28Z), 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/USHM22449443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb35be0f699f0bf16dff1a9314ad9949c92527af703f80f7e84006862aced31d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:45:17Z), 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/NLHR52160602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80f23a45e1e0f441a00ad125a9f3a61b410fe072dd72a32876aa9b73c795eb0. 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/QM6P42445465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f26cc83dd126221a514834dac324d2a7bdb03810e6bd1503f926d31f25deb96. Chain 2 (Bitcoin): anchored in block 957703 (2026-07-12T12:26:40Z), 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/DGA0R2432532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd814367d9df11af8aa80305deda7340451799ee41023e57a0d610504f216567e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DGA0S2454242.