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 0x959d7468cd46396441d8e12a2a9f9c125b319972a2a0bb1812571cbd8b629687. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/936e548b-dedc-4902-926d-db97b91e621b.json and https://artists.proofprofile.net/proofs/artist/936e548b-dedc-4902-926d-db97b91e621b.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 0xbfb6417cd219d58637d94b87c9d44177ac884aa96bea4bd326981a0a48edea11. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W11624173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2410192a643b5db494c302628b3f8684d6363acc165ceed99c61366df75a0ac6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR9W11624170.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4868dc252830d4e67bc4dd490e06b16c82d194d13fbe84d7ac0712a74eb5b13. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR9W12343004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7df4ebd4795574ac008a0ae52addd52113e870468fe5b085e94757c20dbae0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR9W12336171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a2b88f9d8c6a6119c78a426ffdd37ab47a21376bbc59cbf22368b89b63f6f1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W12336172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ed6d562c9b6dd7282a286b674c580ea87bfa9d53efdf590de5d33b9f0073c9. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/FR9W12336173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c9aa3ca14f7191d8b452ac7e3641628ebbd72b1d92bf588aab7ac86b3d2bca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12336174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1721b4d93a59ad9eb46c95f845b842dd5e6890bb9dc07a8da1180629970a28a0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12336178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5312f9a9958cd532f22b337a442192f18c68da0a1c6bb241b642444be7236023. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12343011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fd98b9a5f7b6f0a23e15d0b6d9ed00c80ad771a3398473e47e9c1fc7798a75. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12336180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf55ec5fde1bf04fed89882647b0b9062be6ddbccdcc3aa97babc720b5901230. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W12336181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c981139841afffc61a0963b983e8b3f60681f81e858e51aeff78edb525b48e7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR9W12336182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10019f71e9193880ea3374cf820cf7fc35e6c799cf6708697a3151df1d77055. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W12336184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f033711a430788f49f6f98d04011ae0ff9924a29ffd8be5a5ee571d7877dc4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12336187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf771c9969d529762d216d0569bc803675eae456107f690ce9c7b98d3176b77a3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR9W12336005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469f6417bf3865b3b35eb47e970220d04433a3a5fa09bf3669dc874ecc7127a3. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR9W12336170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e031b16a3b6c152422691f5c7b766257a81dc8aa08d056728f267b506b702e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR9W12343003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108d75e6098d8e201ff88013a512ee28b33aa048a98ec711b6ba45ac89060e1e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR9W12343005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a668712226d8f722529e81c5306ace967a68d411f542bf6339ab1869b12d57. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FR9W12336175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725e16e109af888dfbdcfed0d4674192ca4f26916278d03b08f6a8c0689d0acc. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FR9W12343009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dd9939372895e87f41096d4d2995bd6d9c2772cd6422996cab43a6b38d42d0. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FR9W12336006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4afb8951084d574a296b1798a44cbf7dfc5ac0a7ed25aabccbe4f8af423bd8. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR9W12336177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5f91bc4249c954ec8a04acff233c0da502a70a546e20c0d028ae350e5b7783. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR9W12336179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a75a7f07b99f70c976681d74137623b69ee9340f34bcc54bb6da8a269ae55c9. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/FR9W12336183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9c9f446b7f7d9c81484d90f95a13f047d079fe7f2ecbbbebd2cb95a250673f. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FR9W12336007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157b66883c3662a002c9fb81ce0b95d02bf0f0bf7f3f87a959042a4fa31dd7b8. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR9W12336188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0516db8caf845388bfe5b066ad25d5c06d6df479f8a601c835d7aa9f61359149. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR9W12336189.