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 0x30effcf0ddb68df2af998d5ab70ef278c6875e1b1f529c1c0561b8dcc37a7f3e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5384b588-6e07-449f-a088-910115146c20.json and https://artists.proofprofile.net/proofs/artist/5384b588-6e07-449f-a088-910115146c20.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 0x8f10dd1130b875390e7139662616f4089af994dc1217da0e22cfe7da5191ef2a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZN882235079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c8713082aaf117cc78eedb4bfc0dc7739b8bfb138465fae69f96cb9e858b09. 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/QZYFZ2361331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03fe6ae53bbc4247505b551cead369269ccae88355f81f0d3bb7ff433a46791. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FRX282287031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3786a9a2d9419f44d4128da07f6aaefb87ff697cde9693eab1267368b0facdd8. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:22:08Z), 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/FRX282386648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf714fe02422581c16bc988632f382fbf90acb774a85cfcd492c1bae2d7b33f1e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR96X1708992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e35c601a056a83911693cccf998779861ef2a703b375d62afbbe3cd5c0be294. 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/GX8LE2253226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f86266b28940f9b9e6a70b3e4d28d7bee6404be329976dfb048ea161d62f2c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ESA012403189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f4fbba0f92c18d75e1caef9118f8ffb1d02382c3b71130b8a82b6af1085e6b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:48Z), 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/QM6MZ1738872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03fe6ae53bbc4247505b551cead369269ccae88355f81f0d3bb7ff433a46791. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:27:34Z), 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/FRX282287031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f607aecd8476ffb7c01485630edae37aafbd6ca156d335ecd8ea8c767b90cec. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR96X1922820.