thumb|Costume design for a warlock for the opera Mefistofele (Alfredo Leonardo Edel, 1881)thumb|Warlocks and Witches in a dance (John Faed, 1855) A warlock is a male practitioner of witchcraft. Etym
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 0xd55897cd98fcb27ce812b190b77e92b156a943b507c5985515ca832d5472dc07. 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/e47df0d5-66ad-400c-8cac-a30a61cf7fad.json and https://artists.proofprofile.net/proofs/artist/e47df0d5-66ad-400c-8cac-a30a61cf7fad.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 0x69548cb54fbe10b81d47dc3775b1f537e85816e1e9d9c7662c0f1d9b6ac5f0f6. 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/DEF078703690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516a0f027cbb2959ba19672902b410d80da2cf9de1d4039d665776f4f168ef7a. 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/DEF078703700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7348e64b61f4a84e29102f6f7176a19a802d17f8ff35398685a7b054c3e2ea7. 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/DEF078703710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34abbe8c98bd5065baec8ead209583957437fbed87eabaf0c7f9feb10053d8b9. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DEF078703740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14b6fb6a289a69648208366d521ffcdbefa7360cd133e280a2716fc77661d27. 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/DEF078703750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7b42cad4b71c3c04ef0adf2d3003efb899d9d0e41dcd03f2c89aaf9bd5a8fd. 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/DEF078503220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510e1cd4474a01ab9ca4f4feae30f9723aa6c35bc6c31a65a7b917c9876d4f48. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DEF078503250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ddeaefae762181034e88fe6b3d884928f470dab510c802b773c6e342e5ea34. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEF078503260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c3b32824860ee9ecb32c929ab0ba2d7253eba09daec5ff527ad3cd646f3487. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/DEF078503270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552de53eed4a5ff86c2f4e92529dcdb044e64817351e33f45a6e5b5dbf4b5b2c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEF078503280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33053c31fb904e3870bcc667da454f1e2f6848e7460e2d965466fe09da95234d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/DEF078503290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3041748327ea2eb80c946de50a3bef8a80b4a2ad85a00b9a9e4a481104394eae. 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/DEF078603270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2021e33bad14a1bb0dfdc2fd78c8a157e914fe66deea56eecf7489763b528da0. 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/DEF078603290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eafcf358348052d825d62c4797a504c82a790d5ca886b44d48f147af74fc82. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEF078603300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41f0bf90547791d44cf6268b5e5cfa030401b270c1f34494e23044c98d11d10. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DEF078603310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208dc7d8c9674417869de49f1105701a4ecd76840231749ce5c0952350fd92c1. 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/DEF078603320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52ac9ec73d765c1f6fbb30c65a56f47ff829d98584d1623baf78a5be96c62f9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEF078603340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a2480362524136d0bf888406c1ce05248ce5848d2fd1ae237b29dfabc88245. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/DEF078603360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cae9bdce0430aff56a757c9f835a6b90523e63933abcba348ef7ea6b567b4c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DEF078603370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e803ec573cfd7ec8cf6738e734cc51ef186d95505d339e4803d6d62004c751. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEF078703340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f87b8bbc86bac592e407b0ae2ded024f50010851c8d5021f6194a6d7f57563. 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/DEF078704230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f87b8bbc86bac592e407b0ae2ded024f50010851c8d5021f6194a6d7f57563. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEF078704230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88602405778b483d5133c404d215974fa429fc06b5e06c615129f422c0a0094. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEUM71701405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f87b8bbc86bac592e407b0ae2ded024f50010851c8d5021f6194a6d7f57563. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEF078704230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6304c92d3a25da254924160623e05bb0119dba97f501f16454a792616c7cea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEF078603330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285f1246f93e3b3ca40395d9f2106e9480bda280d60fe355e5c7ae30940a8368. 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/DEUM71701507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31811164f25d7fca331a91c32624e60bd65bd3a9ca612fb7211c8a10c8e14510. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEF078503210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5857d9c548a71e96b6680f3b3e76f088745f48f18452747ed254010a18b9ebb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEF078703730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587303c19d16c539215fa9f3745991c813f4e5ad28e51d3663441bda5c061bfa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEF078503230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffe114326baf62a09dd689c3a67d74b6722d1ba77f5c741c62e557458931600. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEN120303031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0b01fe53aa05d72e5aa4c0287a6cd1ead13489e5c8c494457d480f179b2ccb. 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/DEF078603350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd71994663741f7d1f87c99f8df043da3fc185e28e1b30a55d399a9c0b0321b4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR1MP1602880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3880f8767afdfbab415fd5936b9a66ee877805359d84e045c0a52db2ce01c466. 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/FR8GV2214250.