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 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 0x21c7872f62f82722bf4bc205251d6d53f91b240d8ea730730b70a2ba229cbd9b. 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/7df09252-03ef-4226-bc69-b2a515e1ce8b.json and https://artists.proofprofile.net/proofs/artist/7df09252-03ef-4226-bc69-b2a515e1ce8b.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 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 0x5c642a2a6add189e62bece230d22f93a36e168a864b6bb4b385fa00d4cfaa96a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEDG61000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b45e4684d05925ddd0fa1779a991c3461ee0a121d211931190779fbc0e6a96. 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/DEDG61000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4410e735314422b663a3166436a43d2a6054f4bf255d4c8878a39cb70c690ce4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEDG61000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9d7cad3a1973964350b9b5574013f732ad7ce8ebb25f0aff09a2e55effcbfd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEDG61000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c3e9b8a833ea13fb15e53044f105750ba7dc02d8974e05d2046cf9b5d614ed. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEDG61000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e0fc889ce8fe9b423ed164d9880cb3c8045a8433de71a4416c3f8e8d27d1db. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEDG61000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe074063bcd1e9c7a56aad7605b8743514321036c61350c8c0a97482769c2b862. 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/DEDG61000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fb4b67dd1e1ab912dc138673b27a1986c2c430ee30d64e3b54abe23f7d7b5e. 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/DEDG61000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf309c617e4b83405d0806045bdf9278c156f177f5fdc08a461dee1b828148613. 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/DEDG61000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3045ee3779ac8c0430dcb4e569d15335a4ebf93df2984ee7f58881742ab52470. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/DEDG61000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38282471cfab7eacc710c71b6618f4509217e5630e65e650f478fac5b166887f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEDG61000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0049d612a52db33f869b4eeeb9d458960b36fc2c0237a1f03c1878b5648bfba6. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/DEDG61000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0badca028de1766ff64b69b5b0c0664bf25309aca299b705375e4256c634f5f0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEC831900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5bac0316d237d98629e4126755ad50d9f41ec744226f91a8dbc860f7e352bf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEDG61500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3425b101566a1821a5e0f3aac75ccae2a0ca2981e79d2d64f1a27fefd8c3abbc. 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/DEQ020602057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93798493daa4797216b54b57ecb1079350371050bdae9640a2bf5cc6f6a6be30. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEDG60700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa799307d557fa3f906d1f2f2e572f5834f3c61e20995785addc366d2fba5642. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEDG60700125.