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 0x8b496379083f523ed3f42ec7caef12f85388e70c09b07dff6600f9f80fcce6dc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f6938b0-7f90-4a68-b775-efdd0b999f32.json and https://artists.proofprofile.net/proofs/artist/8f6938b0-7f90-4a68-b775-efdd0b999f32.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 0xdbde3610146e0035bee01ecf3b13626b1e4192b7e237bed8f8b3a4b402b15200. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:10Z), 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/QZTBF2372072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cd6c7a0ceb0c56067f9f55de59f32bc92215b4e5f9a33c7a411c5fd404dfd0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:47Z), 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/QZWFE2397367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28978850f4761042bcad3d81be94f0084bbbd4c86aef578a08edb6aeda4159d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFJ2322109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2d84af89b6c86d03289f21f12bf1b8269d6f15ea5e6286deda2810a6a69cce. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:38Z), 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/QZWFN2347018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee39999995ddec8c86f2507f87475b5110b594af1131cf70f3dfde9288b246a. 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/QZFYY2479915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0e9a335d3230ee93a800bf8d016f07a6161b61dacc6a0b3ba3c6966a915920. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA52455219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238b20cdd7b68161918631657de7ddc81cb22a01e875f0a2f1d2e8b3907ee0d6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:11:48Z), 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/QZES92452007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b50d064a5939dc7af462c471f8de0bf92aed2330ae844cd2b84dc625dfd1b2. 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/QZHN82408498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b733aa6772e4b43697c612a4481182ae99e4b06604a70c1ce8aea83da516eb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZK6K2418085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13684f86f0a11505d6dc3b626a20f428cd5ace3f502568613abd3c0ef9ee192b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:39:54Z), 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/QZNWX2409533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edf7d3b56e6fc58fb6dbfcf1e5ec8dff21d4b076af92719d7c6c253d915de02. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZTAU2404551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa8b806a81f9d27958a5fee7af941694c2f0f2164f9af819c0ec0a49e7e62e4. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTBD2432531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed12d73e8de2edacf65236e47da5e04dd7621901fa6b482eb27177ffa580366a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZZ7R2440563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444e1474db22fb8aff34ed25201e6b67f500890e43e98fd7246267b998b85892. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:32Z), 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/QZFZ22591954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2e357520608a75f58bc13835377bafa208c4ff9cd3c18eeb2c73b0c849f36a. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZZ762450733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf516e43bc4b1136f6160ebf6024453caab659793ebd118ff4fd6769fdcf836a3. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:10:48Z), 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/QZTB32432727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6dbfd2342c8c4391ffcd87dbbdc75d6f832eec7d7361be0d355269d01496d5. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZMER2405556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534ca094158bfc23068cd2939620df24b96b0618bd3a81c969c482116a610a55. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTBD2537059.