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 0x525d1ef1b97ec44bbfd37b3dba1991e4c776470aee0b25028319cdb401bc6081. 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/b4c79a1a-2e12-401b-849e-49717d09af2a.json and https://artists.proofprofile.net/proofs/artist/b4c79a1a-2e12-401b-849e-49717d09af2a.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 0xfab22245d3dc750ef19848ddc994ecc6613b47e4133912615e04336c37bfc852. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZGWX2165697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f1804f25d8f3127097990c7c9ea48892e1233ef4e2d16abbe87d5efc5207de. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZGWX2165700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3013dfe04604dce2fc3773317b7cf382cbc074ebd9ac4db239da831e3acf6bc. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZGWX2165701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9623fc36ab079570b01d727225b50f2d72490e9c31b7d0b5012c6855a9ced048. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZGWX2165705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1892f29f7036883f017e5f1915ce83498534116a7dc0da02fa441c831cfedd9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZGWX2165708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3120fbfc3b4ca59282b172e73c25cdbda692656a37168b28c172e9df1204f6df. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZGWX2165709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63063a0383773648ba7d8f5ba2a0ea64634a56da28644cbcc8a2f3934671ca9a. 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/QZGWX2227126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bbef8a13ce80ae5a3c8240a114b56bcaf2482b6b8a2b50cbba77f4f0574dac. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZGWX2227127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d30930a23f11639546e7efeb9a190ae4a033ca1adafa5daec59c886d2902c4. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZGWX2227129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f850215e7b37734a7b0eb12553c9110277245cad8f18b86f90854dbcdd39c7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZGWX2227130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd679e44de8a76c6e9f5fa3569e835c5321d0bb27064ecbb2626a50e96a38b985. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZGWX2227131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14d164a982ac906ffb8e8d74eb85fa44f7a4ae90b588c075b5c05def87b8329. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZGWX2227132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09ff980018f060ce4a76bfa5e7c54d4c5bc1f2364fab1c25ada4233c282f15e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZGWX2227134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebdffc67368131c3aeccb64aa171de72346ab6e0d0ad404d1d6a724760dc747. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZHNA2381843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b7b9e0d51c68956ee915ac69f9a264df80e94b034f3694f0de2a862b24d3bd. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZK6N2355826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43df1eea3e34be266045dcc4b96add432d2288a0f311a5feb17d1f9d1aaef21. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZK6N2355827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589915c9ebcf0f28353e21ad42dbd07855327e240025c33ed82104e314d726d4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZK6N2355828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fab7ea7791215cb0d131c321f72f13b04e3dc64ab8c2b9432d51b3265af365. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZTB62223993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c80c3a4be53ab0053838b51808984f334e50e2f3e1aa89b08ed75a6b48c53b. 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/QZK6N2355830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbd9a1977f77137d7d4c080420deb5beb853f98109d8c87ab054acc922f2b19. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6N2355831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf575d0e096b77cf52c8ae1ac3cba4cb5862136efc48e4ecafad4205dc380a3cb. 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/QZK6N2355833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048e5db0165a9cb5eaebfb2dd6d37e03d5dd3c302a06d57c27e875f6cc7037d8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6N2355834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b87e20a56755a23830c5494a2a60b736cfaabf21f7676929880b2f526a029c4. 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/QZK6N2355838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda3c01b4ea0edda5c670f7dd9d465e9de5e26e91b5784c0412f318cfab4dabd. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZK6N2355842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fd81434930f7c798d7530f99e625a57cbb76382e46e908ba97632f6769d21b. 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/USAT22404393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9b74b38140524cafdd54313222b59489cbbc1346ed3f80c2490e02e6b7f726. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USAT22405214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f96e3ad4e59c9b38a0fa1ba741b67523b6bc5f435e1beac439339942d776d4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USAT22405231.
The Afterparty - French House Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f7ec785e688c35aaf9b038143393cb5aff91d434ba489e4ed5750a5632ea5c. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/USAT22404402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae351c9f0f86cc08288290bead243f16e357cd81b4ec2f7ef5c1044728715df3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USAT22405219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88267a0e29a3c9db7a98b0c9b930b49a5aa04f40ebc1cf58f34a692910f96ee6. 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/USAT22405222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a409b9be0832c8aaece2f770d46465c6976388ccab0d8300f1cb3dc725e796c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USAT22405224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad14922d6e9198d2a6953649d154dde9d3e26aa473b5bfb8e769eb2e954e3c2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USAT22405226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48bc402d9fb47b53a5b551d46aef7154411a1a1460be0e01e81455de4f1c570. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USAT22405228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5506901ff933419d43b4b00777a9df897d6fc702ca0d5b9c38c2fe0d3c337ad8. 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/SE6SA2168403.