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 0x2fc2fafa3fc45e284bb070c0352f41b04315ef09fb25e95f50d78aed5a94f65a. 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/c4ae1c22-821e-4a86-bfe1-b3ae87d8dc08.json and https://artists.proofprofile.net/proofs/artist/c4ae1c22-821e-4a86-bfe1-b3ae87d8dc08.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 0x6b019745f01d8e769f088e6d8c74c41442a2fe4fa6dbc18ab3ff5e4867ffeeca. 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/TCJPP2192443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04e8ed666effceed6463285d5acca9e6fafde56b69a03a85fd260e100d2a4a3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPP2192445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b17751e8506ac99aaec84bad2c1127cbd059fa445d5509447cdb1be882182af. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:13:17Z), 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/TCJPP2192440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3e12dfb31b524223ed1da2bb176f7cce264f0244113eec569b64216d95df34. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCJPP2192442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b970b4a2ddbe0bf945b13c6cea21f580df845459293a51ef7abac76953cc2b. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TCJPS2200952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ce1badcbaf573217726eca0ee776d5bf8113a9acf764fd48e1062234c5c343. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:42:33Z), 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/TCJPT2203314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff268f90d750474777284e565264a844dce5fef20d7b5afc2c767d9b62438c4. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:02:38Z), 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/TCJPT2203319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721861a139115dc6aecc64612a52084de79ce21b06cf50d78e4863f36112af33. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCJPT2203331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc88de72bae703e03ee82530f802b9af99c0b22d7e0800f50fbd12e3fc34d00. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:36:28Z), 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/TCJPV2386419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc88de72bae703e03ee82530f802b9af99c0b22d7e0800f50fbd12e3fc34d00. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPV2386419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2bf85824877c7413328b1596f5d7df8256d4922d54f6899f269f6bef3ab550. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCJPY2316646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b71314cec5d3582effddf731d952e08196709528871467b6f7789932337af1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:57:29Z), 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/TCJPY2316677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a510749f979171df89e823bcbcc19a916cff4a9cfb34931e47ccf383a53b3a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPA2401153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949544e75a89a5d1068a1c23ae0c6651eb08d3c2992d7840f57c09fb02addaab. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCJPA2401156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a510749f979171df89e823bcbcc19a916cff4a9cfb34931e47ccf383a53b3a. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCJPA2401153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfa7c9ff9498eeda8888728491b8a8192edce514c07e4d266bf47fd44d8119b. 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/JPY202300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeff48369c1c3f11346eb4512a9f489defae80964714d8a1022d3412469693de. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCJPC2415711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68c955de169eec0156b11679d7db4285956f10e3f50de09c7cda318487715bd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCJPF2580779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6f20990add5f9c56a4816710f3b71cc531c153a9ea4e4ed97c9b9d9989f886. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPX602300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639087606bee07d7176fa65cfc37f15daaf1e2fe5e5b8fa7b2ed6092eabb43f0. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/TCJPV2396512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ff3f9b6ca38a195b06e351e9759bd53976bd1ad2ff2228f67204e37fec1c6d. 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/TCJPS2283920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf01edb2287cb765192d9b0bcd3cfd5ffe8be6525cc2e039436a8cbebe63de2. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/TCJPS2283941.
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