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 0x1b165d331f02e0566c1ddef7a4be14bd4260acefecbffc3894cebeb9edee9627. 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/f608df2e-f71d-4672-9061-e8acdd239462.json and https://artists.proofprofile.net/proofs/artist/f608df2e-f71d-4672-9061-e8acdd239462.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 0x97e7d5904e79b39f70b259bf465ddbd33c65d84287a7e3b0b960493ea7f6be2c. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:42:20Z), 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/AEA141600656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414387cbc56b6e8a7291f5f35a910eea56d8d2b8f6dd44ac4ad09d05ba8a1ec5. 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/AEA141600629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0333010ec47daad07df9c20ffdc5a98381fc3ccb6f438d75b78a4a2ec62b87d7. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:28:17Z), 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/AEA141600632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42460048d93a017737c3aa71aad2ab6c6deab288803aee0f874831b27beb90df. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/AEA141600634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2397b9db7ce6b0317c48c42588c555a0f8d65ed9d64502d9cec4e641583a2a83. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:24:15Z), 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/AEA141600638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7cbf2708ec08a8b6206668ad3d0d043291bb389a5f43d2f27dfdace3520b21. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/AEA141601107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6490093c0cf185f4a17aefcf832bb86238989afcc90c8b2a5de87449324393. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AEA141604034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174b3758278d6a49005c7e26e97b0af8e89e7bbfa988fbee053f50d69e55d66a. 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/AEA141605092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180a655919e018ad4fed16143d0ba71cb48dd9d014b8904667b7ac8177219e07. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/AEA141700333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5302b7bad0a8ac76958b8377a6607c5e8bbf51522db04cb4dc575ad3794720cf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AEA141706354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdf0d34580fe6984f403d949c3ed136b36ac9dd27353dcd54c59cf6d5cea5de. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AEA141806530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e5841b85b31330f626b7f6c352ae8d78b1736baee9d30f4676ed09b4305b96. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/AEA141807833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5437dc2fae892cdd01a91d51c4c0a46484d4d927915e2b6cadb3bd5875e30eb9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AEA141903196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97416060e27bf9015f3f83ef2f83d84aa65dd154bc20bf72550fd470e1c816f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:44:36Z), 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/AEA142500527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a8854345a7a129deb6211bac685f1db74a043fe4311030f64e56778266ba86. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:29:24Z), 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/AEA142504427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823da1cf7deb6834c0119ceaa392893f586f737da6f6d40b3b957b0164185476. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AEA142504986.