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 0xf628b420a55bc84ea3a0402ea61689d877c9fd1c8212afaf506be01aa0a80ae4. 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/bf22c868-0939-44c5-a26f-986f3d46800c.json and https://artists.proofprofile.net/proofs/artist/bf22c868-0939-44c5-a26f-986f3d46800c.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 0x9c4205d06025e10944d9853a43e9418f62b360ccf00773162878f87eafc330e4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGWW2102994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45281605048be65da1d2dd40f912bbb5e74f88e5144e5e7e909edfe701bf4a99. 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/QZGWW2102996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036652c477a2697c3c4cd4a1e11ed5eb0e29fdfa437071ea66204daab01b9f15. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZGWX2082237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08abfbefa0b6554fe5149e53dc4b22cad626d8ce0251715b084a5dd9ab226530. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:41:25Z), 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/QZGWX2082239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50eb52551278d9db5e2034525bea2965d0a0f4e69bb6d8a3bd02cad3fc76754d. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:06:48Z), 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/QZGWX2082240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8200cc08e361687dc44a8274fa1c8ad7202dac7d98704478a19b4aa26712cf0. 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/QZN882177416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5a4c9e1feeb6e40fb56e16f7b25566e40643d5ee6389b6c096aa3c1995a0e4. 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/QZN882177417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8f60279b33fab010eb2ddf7c59509c93caf182933d7e0d4d9aa13704da5317. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKZGC2301017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee5960abd08883ae2575128cf91ae9d481b390817214fdbabe28e7319be0595. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKZGC2307349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a359b4dd429f352a3a2fb47819be6fd17e44a58121f3d1f7d21ec0832b5a1f. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/UKZGC2400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd172eb8db4c760358ae764d529ca112814088016fd9d1035f4e72ee7db9eef5e. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:40:00Z), 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/UKZGC2500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587a438705dd25d867c0528ae7c870cc3da480a63bbfacc47d7ad7112b8caf25. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:05:02Z), 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/UKZGC2501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490a845599f24ec49e6f8ceb9079a340e2b689ba3cf184c606447f168282bb6a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:42:02Z), 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/UKZGC2501524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d3e5dbf39c978b05f3b9545e1d261f72ea4e034575cd2025b12c16c1fa4b94. 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/UKZGC2502044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4e54f1a0c0bc349c0be8c58c32aefd346ada7019112c60f9d9de15ea432deb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/UKZGC2502744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f6a6bc61fc2e3507a80317c1754996ba2f380aadc022e102df2378b7220d53. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKZGC2505178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1627b6741f7b7e8ab15f1ddfe52a6fb250bb05a6fe319854f0fcda00da341d84. 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/UKZGC2505179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d8c10e2fb206212825253bcc636727bd97f26559d90d0d8ff5fd2ae447f06c. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:11:08Z), 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/UKZGC2505180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96964c7032e2f03c1069c33a3c1721841055f26102b290f6522ea45809e5f3fb. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/UKZGC2505182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41720adf098afbfa1b30c1aa0d91c8ed80f99f37175900f5394a92fcd9c4aba4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:29:33Z), 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/UKZGC2505183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9210f07ec4a4309cf21ea3929fc181e6658144a911dded10948d45bd2ae55e75. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKZGC2508001.