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 0x4a05364bd79005ea8c1745d1398388f728b214f6d87daf39c1c74e67fd825707. 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/ebc85072-ed25-40bd-b196-74602f8d48ad.json and https://artists.proofprofile.net/proofs/artist/ebc85072-ed25-40bd-b196-74602f8d48ad.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 0xc5adde36e92d8c7df32f02969d8f9b1241475f0950f6429658ce4c7798dcb180. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FR2X41442273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a09039041fa1281f9038117f2edfbcbaca3fa0d9b361537c276aa7a51bdb0ed. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2X41442274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5be6c9ca024a3213720f5217333bcc64f60d1bbcc55a15032b7b066cf74bf3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR2X41442276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf668ec99072d03c598b3a69de98ad95b424383d51b1e80ccc520db0376d2c2. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FR2X41442278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5fbacc6ac34a75921194f94e4f00e22943bbccfdc55044e6eef5e33e848c8b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:43:38Z), 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/FR2X41442281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4197563ccb463240f5e35cd3302106c6897ac6fa38576101301b854cc6e0ac5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:58:59Z), 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/QZK6Q2414577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059356cc350f2186da79b7600c43a717dfafafc632f95348a984c2fbfe752574. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZES62587111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea96652392d78826300ca1286505742edb63715c9fc74435d1273944a63fadba. 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/QZTB62571012.