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 0x736d428803a82b198d5001ea2fb1451aaba587c69abcf05ebdcaa1ccb2bcbbb9. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da2fc631-ad03-49cd-9336-98ef7bb8c34c.json and https://artists.proofprofile.net/proofs/artist/da2fc631-ad03-49cd-9336-98ef7bb8c34c.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 0x87aefadd7df31252a43bb6e6386e864664f488087d1453576874dd09b786e685. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BK4DA2453796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321284bc4b1fdd2f06e9034e717d63ca6e1861eefecf4964fd8ff7e898f56a15. 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/BK4DA2453793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085a3a4d59bc1db0cdcac7f37475b751735256a053ff17de5011fdcad916ed30. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:54:28Z), 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/BK4DA2453792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ccb4188b548f075dbcc5bf3e35b45d83f8056a7e5cfc6150207fdcc934b2cf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BK4DA2453788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde809b7f97bbba89f66088918a52dc708a1765e9427d02ed96f0c45c5f3d9e11. 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/BK4DA2453791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ad0fa4c2263f9f7b2de19c4ee4354975273a20e6e647cdd9dcab529c5a3370. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BK4DA2453790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12162d9e3d187a56ae6e5bdca317ac56f21b5be05b62f36af6de977ef192f92d. 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/BK4DA2453794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1fd994d17625b2ff72f9d8aee7dac77d30b6955a66db491c93d0443aea88b7. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:20:18Z), 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/BK4DA2453797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bde4002b974546a8ab081922611c06f25f4f46f90abf1974c7a09ee04622583. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/BK4DA2453795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ada283cc40662c26ae3180b6f35a25f6ca158ea6f3bb2a55de8c5a60ed5e4ae. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/BK4DA2453789.