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 0xc6330173a63ff75eeb8fa9fb061e5ff3a54820ddbee5ef5aa862d363f55c1e9c. 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/023a89b0-467e-4e87-a3fd-96778d8bd7b0.json and https://artists.proofprofile.net/proofs/artist/023a89b0-467e-4e87-a3fd-96778d8bd7b0.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 0xef4ff8ca9d8308d443886494d5b53e5e57dd0b1412cba0bc825bee15b4e0e3a5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES92351358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6cbbb6dac6032a69cd7f42a0d221480adeffc40477034be46ecf9d53e51c52. 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/QZES92351359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42544a41134e4ee4fd95eba59a35a24ee19159fa862e3aeefce1e3403c7c70bf. 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/QZES92351361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990ee94b3df95c85ca63b4659964a19c83b3ddd9403571e9e878fa420c9ba403. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES92351362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a121e072cf62766fd7ac84d8877f7754ae0be80d2ec0e5215f34bd62098e38f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:09:26Z), 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/QZFZ22310716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7d543a419620489b9ef73ad36ab2f9d2f8871e3874c1368f415b910c3ab3fb. 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/QZFZ22310717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0223817a7e0a6f956756d1dca371397338e967ab7d3343748f1722dc4a99e004. 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/QZFZ22310718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf7fec7b5edc1ccc36d3a08279bbc2ed95044d5c75a64211fcb186c4dd1918f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZFZ22310719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5e8973d6982b95069d737856f4315f12ed67ff33cc8010d61d142c7760cfce. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ22310720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3e5f9a1015512748ac7529e7d5cfc98c5a12c1dcb7ddd9301879bd7402e8a0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZDA82396390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9774ea347ea5a784bb4d908360324da7b9e689b9d7f23af3df6e99206d916b3. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZDA82396391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c41445aebaa5f86f51efb2c3bfb7ca1706800449d45665091fe4d66af3388a7. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:00:47Z), 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/QZDA82396393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e0d00228e16b274e039007950e38612080d8c2aaee8645c6e2defc22aecab4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN62356314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ed7d514cb0fa75b807a76c04dc8dfab754399bac494c1f20745cd2bc9bbf2b. 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/QZHN62356317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ade85e2eef4525db92d1ed795df0bca770c80fbf826ed65eccf3290d937912. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHNA2388179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceae97bdb3e5dd85e090c8bad5118b0039f426cd99db1238e9d7f8b6258faa15. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHNA2388181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4569c159523265144f000d9b4e11d4b421d145113f314ec588ad5b0ec6534fc7. 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/QZHNA2388182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaba3f5c43cd0d718bc1355010fff483868a3a6724ff5c6ae27f486675b3f82a. 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/QZTB82324797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bd43b2b0c5994c99e808618dc6846dcdbad15ffc7f3b2b5f9f8bc85ba22cd3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB82324799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36056adb30e12c64a24b480d872c6ec11a8102bb9fc786507c202cc148cd5549. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZTB82324800.