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 0xce2c2df5088f67abc8ff245d9cdadbd8764b755e538f06022385280f8a39adfe. 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/96fcd127-36e6-457c-b7f1-1558c8e3aa4e.json and https://artists.proofprofile.net/proofs/artist/96fcd127-36e6-457c-b7f1-1558c8e3aa4e.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 0x932229736d618320043378d5ee1479922adeb58ee8f26b7d4be7d0bc6deaaf64. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:57Z), 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/TCAJF2531620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ee1e47d6213e04f0296d70f7f036a0fdbd2d3749c23b02b7b0d56d59f146cd. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:36Z), 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/TCAJF2561005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03bab2921edaa5d4700ddf22525db912e095ba8995d9152ac8625b432de8109. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/TCAJG2506291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff70f69d1c2da36f9d18ba91208c921eec13762b6eedb39611bc24159b8f49f. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:37:25Z), 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/TCAJG2514069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94557a0fee7da34e13e8b8fa66c4d2016e40edc2ed9371ebdb4040adc0c0679f. 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/TCAJH2504664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ea17be11e2604b0e3e2b4e50bb4714d4531a9be07c89e0309335eb0cb19fab. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/TCAJH2524317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac88f386139a3e17b7b0d487701e874706392ecf86265e569238e99741f8004. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAJH2551715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f167fc6f50d42353e0f1efafc7aa78f9740b20e3bc7b71ac5c8292a4f1dd04. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJH2562630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2f5d949fdd7a415f42d67cccccd07b8652bc67517927ad5ef62805f6fc3a07. 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/TCAJJ2519972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02c0ebb35409fb2c45d57ccdd40b569da4a95dc8b9fe027e1571b67d19949d8. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCAJI2520004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534356dd3287896aa880dedfd843fddb87406c8241845a25ae31dc5af3577901. 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/TCAJI2520007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dec726fda22a0474b1efb06ea5cc3aabb8af932ad75e0c851384c5a4fdf4c5e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJI2520018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c467875562204b27d029b87d4109d75f3af46e60f63be3de83ab7f9dceb0c9b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJJ2543384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ce50172b0d1ebbc214173d39018d8391ccd4ca65aff52c61a317fc7ab1e0b3. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAJI2555336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110d265fcb20c616a89949d0d4df1c36d3a1be5f505c9642ba3e968a2aa8b17e. 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/TCAJJ2558498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b68914b4d49d2a5e1bbee52e85800e784c2509a32a4ee6b0c90e4acd9014877. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCAJK2513646.