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 0x3b7d3d9d95f4019f3c49d91df4ccf0eeb7303bf3846f42fc344ae68b485f3fad. 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/f91d1bbb-7984-4b37-b846-3bd7cc4fdbd8.json and https://artists.proofprofile.net/proofs/artist/f91d1bbb-7984-4b37-b846-3bd7cc4fdbd8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Stranger in Our Pictures - Re-Imagined
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 0xecd055d0ea138136949012a0b14b30e18cb3233f7a85c147bdcb0de6ba2436a4. 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/US3X52045001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada9123b0833dfe08cd185b539582bf2f59bbf2d15f63997179cba736028b1fa. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US3X52045005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcec87109ba26207a12adbe3290242d767fac70c2275896a64f866d2fcd2fe60. 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/US3X52045009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fa5b394c7038bdf89220b1e23a0698637e516288456e57ec01a8ea6e01c839. 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/ITH712400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625079345b4d159b9d796d08efe003a4255c2cf212a143440e2cebcb6b42615e. 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/ITH712400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c36afcf2b413b0975fc199b2e0132994f726163adad44f3d0a2188c1bdfec0d. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/ITH712400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12df127431108375fcdd2f73d5325a7841c32d08c85de29d34040ba3005ce604. 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/ITH712400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a38dfe494cf748ea9d197b203d06ad0bae3c48c136776c7866f00adde637a8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ITH712400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb567bd2336aedd94ab02248889d6294853818c5cb24b828db60cf379b16b69da. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITH712400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd7937d2229a8516a2ed22c99539f7bea60bf5439b0588ea5b2613237377f32. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ITH712400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57bdfbe54994fceaaa8777315abdc4dce8c5c215feb915ba3ae01d69d771324. 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/ITH712400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e6ad383d30c3b526bd966eb6a34482fa19f832c8e3f0e1af1f98794c5e433d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ITH712400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94c5b9ebe84a903e6d3d873ef044a7f3d6afc172387e1b673505807808d730e. 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/ITH712400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a38dfe494cf748ea9d197b203d06ad0bae3c48c136776c7866f00adde637a8. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ITH712400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bf4e4e728a710199f028f0310e0847d3e76e8ab47e3712ad6847df3bed5f11. 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/ITH712200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcec87109ba26207a12adbe3290242d767fac70c2275896a64f866d2fcd2fe60. 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/US3X52045009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875932fa3a25ac2e25df32db6c3c78d8e1e0e92e6f2639447e1241a37bed1377. 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/ITH712000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14652017d3a508632a6acb08c58d8069b0247b870b6c813de602c7da19eaf04. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ITH712000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd243ec7d1a4fe89579ff2187885cec790c45c27e13c9366d28d237702ae6c530. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITH712000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8af92b80966ac84dd0d04ce9fde4f4aa82880db9357b79b18a6c279a609ceea. 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/ITH711900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bb89e1aa01a92e86b3daec0736f41210187edeb395feb4b5823ab6c902dfaa. 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/ITH711900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99442c855cda8fdbd1e7811c4034d40847a2d635f385b53ac30e33eb7d95c82. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITH711900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d0f77c5a96a2146da74d71f3e1a91260c8d9f068880629cf154d8d838ff608. 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/ITH711900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce9cea7b6efcea2fb0790d9bb3625128254d17c3960ccc90fa1af0a801a35af. 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/ITH711900078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5194d32bef096a3cc6eb56404e136a751dfa04040d94fb8e5890206201fa4da. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ITH711900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc0a857cfb76c1bf1298aacfdc8311ca0024b6625ef89f71fe67a556d533e43. 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/ITH711900080.