thumb|245x245px|Burning witches, with others held in stocks, 14th century A witch hunt, or a witch purge, is a search for people who have been labeled witches or a search for evidence of witchcraft. P
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 0x1d025e04df432d97909ee7cabad2b9f998d2100d6e819e54737ea8ef505d9eba. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fac9cd9f-81e5-4322-b725-fd7fcb0e4d2f.json and https://artists.proofprofile.net/proofs/artist/fac9cd9f-81e5-4322-b725-fd7fcb0e4d2f.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 0x457f467f5c493874716012c3ba0cb85870c8d362c2c1d51bdbfcd4f60f8812a4. 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/US2B20910034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f75aed1eefc3615245abcf0b1a64569818b597e375284570a8ee3d5b077813. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/US2B20910035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeb70e39dc4f8cc49d09ab2c7d6feab87d87bb814e1811a7926b91e7d0e6afe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US2B20910036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d93dc911cddec8748c4eccf286e365f13af7afa00e41aac429f5be418847b67. 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/US2B20910037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3026cc6b7b71bcada1d3102a6298ad563ea1902a108d7f715224f1fbf5a90590. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/US2B20910038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560c8e6cd826eddaacb41af636fdd99d0c5be06bd0907c3cbf4235baa7448601. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US2B20910039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09fb575fd1afbfdf1c0b327af1b1e0efcd7700716c936e7f42306bbfa7275c0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US2B20910041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd68281a8e76fc2d94c693045ad6188284888f8048654753e5f8317037e7b1c. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/US2B20910043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dda1159306efc9d87b7c1ab256d3727566a1ca23bfba9294c4a72b3681332bb. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/US2B20910045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871a58147335054a904f5d1fffbd8c9950a9d88eb8743ca58100f7aeb95ee049. 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/USDW60710037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda267b84141041be64c22d82f6890af210ee94de9a75e0e58cd7d637704478a7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USDW60710038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c15a0a3363c7e2cd5e3190ca6ecbbc3626e5ca0e73b95cbe255ba6a23f75e6f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDW60710039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b373783eb70af7e4dcca11fba009b428d3b415aa304004c006540d7efa996b9. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USDW60710040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5756e79fc0a0132b6d91fb1ec8d3c3140aaf332345a834967f3833cf4a3aeb7. 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/USDW60710041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afba6682bee3a16af48a39a4359c67d58754f0746403c81b6891407ddd74339. 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/USDW60710042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c49429fd26ce1b2ce4e1fa11c136200dfc5b779fa7e8796d2205ab78bf21cd2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDW60710043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e7c6b6feb4bbeb5b7ed8b50eef0bdd5591a7826fb83c78289bc6b869e6a600. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDW60710046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11168a0aa68c58c78386cc123d55497cd38980c382de0e3bccc4c7c92c737f0b. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USDW60710001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32be427b32d1d758550def7cf1eed1fdb030cd263913c5a8fe0b4350ce20b8b9. 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/USDW60710002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692c221310ad63204a8335eb6524cd341dcae99ff7cba0154b8220e08caa8c3d. 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/USDW60710003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff85002fd345a490fdd7afad507df23dcb554f5b355a91370cbe70fee3488ff. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/USDW60710004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977c7602da47b4caa0225fc9dc3ae71b306c7b99789fa3fd79faf1df3443ecf8. 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/USDW60710005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbf10e50750bdfdf7bf34a896068c2f4a61bab356d2066abfca82a2cf09718a. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USDW60710006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6381b6b473afeffbe30476ba69a5354fe83ed995801b0d2eedb51cf4ed462fb. 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/USDW60710008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ffb2d2b6a087e3828ba8c021893df0e840ba92116546c36f7c9a728fbc6b2d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USDW60710009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f1a8413a0205a8230105dfc320b25a12e74e5446916c96de2a18a4512be138. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USDW60710010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac565101a423473d6fb3405ee5170c2068d4f2919dbc98d9ad775e1da379a902. 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/USDW60710011.
Sugarcoated, Yet It Festers Inside - Demo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ab58484499bb762d22c424051f094ecabe6a9660ce97d6df8ee5c5d359259f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDW60710013.