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 0xf756812193d66866e4fbee3926f8da3768321368f632983ab2d27c04c005d364. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b184c21c-189e-4ca0-abdc-45c3d9ff8bbe.json and https://artists.proofprofile.net/proofs/artist/b184c21c-189e-4ca0-abdc-45c3d9ff8bbe.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 0xd88a63b3420b0fcc32205183fca48b38d1bc284b3c73ffd5c31f341e965c8b8d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:34:24Z), 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/DEZN82531245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9be21d5da0e1c152af13f5308dcffc01be3cefd6ebe51b93f50d0d6c6e031e4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:09Z), 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/DEZN82530897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66226ac7d265ad1a85961ce90dcd32ffb85d02a33c7553873b251b6795b2f15. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:35:24Z), 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/DEZN82531210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499511437d16e9a90fe0a3f6d3dbcbaf065c59f935ee4473436c506ab5f9b395. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:06:38Z), 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/DEZN82531193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe882a2484b3fb21b08a9507dcac38dff15b131cf303c554897122bd0091c34. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:47:15Z), 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/DEZN82531278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5fc57c80620865b06eada341743cc0ab021f17829f938d52b6997ead55691e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:08:33Z), 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/DEZN82531018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85bc6ad0f53f38a3022f256b9896c79b2fa86fbe91828ec38b0d95fd0c23ef1. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:22:32Z), 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/DEZN82530947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8cd4ba3378f0e0abf47478d881fa6aa15c31644cfb42cacebb826eedae4712. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEZN82531142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7fa181f5d2196a126c337d90d397144dd6d0c817d5d3f8f3944de5f0445016. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEZN82530936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020d903a9efd3a723f0cc2fb25529c49675295b83402aab329eec12ea5409fc3. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:32:17Z), 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/DEZN82530812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7587c1531cbe776d706c75f522967bf745badfa24dce7e68430871c88f71bb. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEZN82531191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf227fd40829fe8fcabaa35512af4252035e0c3ad7c78264e474acbe4020a2b31. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEZN82530962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4786e5ce804f854cd5ce90fe81df345dbb5b96a359d66d6d35cd8c3855ce63f. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/DEZN82530908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2794f08abffeeb5f7cc21b2628ad53eb5189669cb8b7f693e8fdef6a975c23. 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/DEZN82530927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7295702f49fe4571a553e9cb7c4a322b117ca6270044c0f4b86fcfe06872ce1. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/DEZN82530903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607ed5713ff7a0969b7664bc1083b0ad47429d63941d284856e8d094ca8c295b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:05Z), 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/DEZN82530967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09b4caf06e446b91612db6dd7f2e9d3d54ca3b4ff12dc12e8ef9da70b1353f1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:58:07Z), 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/DEZN82531234.