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 0x591bdc9dde63f6a50daf598ffb160fc87a512aa4717a1a4be65a07d73c20cf9f. 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/dc2d84fb-93e0-4779-8d17-93897a0faf21.json and https://artists.proofprofile.net/proofs/artist/dc2d84fb-93e0-4779-8d17-93897a0faf21.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 0x74f7f8866ea1cbb354f0f991f1d661a33e2417c499e4ddaa05634a51c08ea535. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCAFN2199178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8df2a579d60869cf7e9a03e88633955c15277e9ea9074a83e1ad2db266d4218. 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/TCAGL2256090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc091e4a90a2a4ca3508904702a92fc0b0bfd4dfd9477c8159f2f538de7032fd2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAHD2335252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae7ea7b8d1d930b631784154df0e2cff4d80289ea6a0ccc6675654b69dbc362. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAGW2370957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5507b4b414766739db2ba792b17ab26595b5a2f9e7c83999fb3c0b12b56af72f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAHR2389649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d59a34ab2893055af884ea80956a4580fea2f79c8de0e13f506c8d854eba2f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAIO2488350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c840c926e0afa8cf23f0c9ff4e042d54a5514fdb74362ce56241a0c70e42ec. 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/TCAIS2405764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bac93b18d6121433fa07e0275643bd011789533ea682a856da145d0ac6ecef. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAIS2405795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a80b95508faaa3acf9046081fc2953df28c5f3c2e700f657087321e43155d5. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:18:30Z), 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/TCAHU2475151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d59a34ab2893055af884ea80956a4580fea2f79c8de0e13f506c8d854eba2f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAIO2488350.