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 0x3599168e3168b519bbf281ecdc79a1a4e2bb846882582f5e0fc00942bda551c9. 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/d068d5d6-6372-4778-a979-4ec64c84803a.json and https://artists.proofprofile.net/proofs/artist/d068d5d6-6372-4778-a979-4ec64c84803a.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 0xfec7bfe3a54140beb1d4b0708a16a08593798668a27c827899e0358e56d50d05. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:30:30Z), 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/TCAFN2136222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff573eeacd16c1676bc628c388e94ef2d76d7be795687b7d83e55269e963894. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:04:29Z), 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/GB8KE2202464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23de1a6aa8c177eeab572064ba168dcfbac86e89c51a2c7a6a64dc2e7d3de093. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:20:42Z), 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/QZMHL2267155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1af9e69a9f1b689ace972fd97930f112773f203ba5f5b62a9fb045174f3e68f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:01:04Z), 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/QZMHL2277523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbedc1cccb687fdc159339d474a0818624820c0b08013eed24c4c00d8fa94f4d. 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/QZ5FN2355377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cb702ac40d73a5386006cf056ac7184aee83f29148c8f071da705859342fe1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZ5FN2355406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4b0b5d2ebe57e615b92e6df0f7accc0b636c304ddcf9a3dc6d8cca2a8fe5eb. 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/NLT2H2300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f975e1ed6d165eb8ef7077a9602be14622c4ae2a47856d327e32690661219fc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKZGC2302259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e07b37f98449c898ec87a4ed24c983e4dabd3df140bff4265f92ee662c8a08. 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/CA5KR2367529.