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 0x09f9f5d58b30c9071b61ef1e099e7e5091ecd4baf3ab8285e92825a351fe8984. 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/201b7cac-3e58-40b3-a0a4-9b8ae758c0f9.json and https://artists.proofprofile.net/proofs/artist/201b7cac-3e58-40b3-a0a4-9b8ae758c0f9.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 0x954247c029e938e04dcd2d7238846ffed76f390e5c7cd15aa6a0da1073a3b0f0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ART0G2001483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2e8af40e0960df2ae758013785a4f108c89734a5aec0f35f5c1978c557d6b6. 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/ART0G2001485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512db1063cc3a2f6d080bd0b12db53a54fb9ba6bdeda511fae9544bd71a24204. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ART0G2001486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1138e21284c885d985cbfcd5efa3875fab4ee38e8a3a065edb1ff4fd25780980. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:02:34Z), 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/ART0G2001488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed32f6f0224ce32fac6f5185041dee92c20d9af1f31553e1db480fb41d531a67. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ART0G2001491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b9e083f2b2b553143d082d484e9d8e8a8beb443d031f80c5b837c6e42b8b2f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:07:59Z), 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/ART0G2001497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa54f3cb3e1d085156b0cae9477d37239efa3da9da1a4669e36af9e302cf1dd5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ART0G2001498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb8566937354ce5aefcd214554c79f1156855ceabe08b0bfbbbef2f78cd624e. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:30:01Z), 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/ART0G2001503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512db1063cc3a2f6d080bd0b12db53a54fb9ba6bdeda511fae9544bd71a24204. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ART0G2001486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1138e21284c885d985cbfcd5efa3875fab4ee38e8a3a065edb1ff4fd25780980. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:24:59Z), 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/ART0G2001488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed32f6f0224ce32fac6f5185041dee92c20d9af1f31553e1db480fb41d531a67. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ART0G2001491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b94f365c3ac401985510e649c2afefdba733e73a99249be807a4fbe5f8b9feb. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ARIXB2201143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb012410ab68112a99f232fb0336dd3f69482a817e83ecf2b198feb44938ce. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ARIXB2201250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d15e508357867f8efa7b4bf3fa7082707694652bef9b582ddbd45c54c99af1. 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/ARIXB2203095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a920406905ba5c3431afd728356c6344f0a3d1aed0a738907e912c8f695b9f. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:05:56Z), 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/ARIXB2203094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25940d8064e00486cd3f88c92bfc3a303ce3cf7676a96c26646b7b3fbf9e66ba. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ARIXB2500340.