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 0x9bbf3eeb142dcda98a442f45d1e32d5111bff36c56c03a91245e74bb2f590919. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e754bdd7-a519-4a68-97ee-c138ee230497.json and https://artists.proofprofile.net/proofs/artist/e754bdd7-a519-4a68-97ee-c138ee230497.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 0xc2c2356adf7a1183cb3ae29f1cfc0f7791beb2a5aba7f986e41e34e393310e9a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CZA231202471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99978abd1597106291a0853c1330bf8da96a2f65f6afd40212c36a3872ff4fac. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CZA231202472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306f77f3a157f6913453f3d5379afd664a52216c64978099969990186dff0b64. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:20:06Z), 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/CZA231202473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf979bf4eb257c062082be099b763dc118e76396782a6e81e8831c8869800e909. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:52:04Z), 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/CZA231202474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f5d9eda3ccb8d8a020f85e3e214bff038b08e8001f1a3ac7b47a52315a6e40. 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/CZA231202476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88de0aae5b4587813d8efbe167b88eadec6985d38a3e7b90ee4ef925dbc6c9d5. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:47:35Z), 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/CZA231202482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f5b4fba9fd0bbbea5ff699a15f97f639be95701b6835c192bd0deea5ea903c. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/CZA239200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b7366dcaef55541e41441132c97c8eb4471d2a68b5392574bb82341cea1374. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:58:28Z), 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/CZA239200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f4c93c1c819f017dabf126763bdd57adb117e642490eead840e88fa488ab46. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:53:54Z), 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/CZA239200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c77319d2cc76035aa091285dbc4f5cf960a306a0416286f8ecffd7a954defcc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:20Z), 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/CZA239200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb3f090352c909ce9e421b09c56b8865de7d3bd29f2247d5c812e47d8d72731. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:20:02Z), 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/CZA239200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67aa0b5b0eb2c1590286d62fae97d6275f850c925600ca58a686b6fbd00fe7d. 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/CZA239200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0261b6cbc9981d79ab729fc399d04fa26ab8ddf8cd37e7f9e42197c59c7df2d. 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/CZA239200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc6460f840052c700d2cc00302b49e34758a15e262c166feda1d69008349fa2. 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/CZA239200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af377c51ec572ef7752c14dc480eeb2cedd1c676edf591d3b251c1b47f66eef. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/CZA239200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf966d61e484a7d795c75b9362eb60fcb3522ffefc8e05c9af75995d68a3bbf6a. 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/CZH241600009.