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 0x70cc8b166995ace920961930a7e77f5d00ffa49821f54cf6426709d03e44c4a0. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/455a6b0d-aa4d-4c0e-be27-c80f6170d2a7.json and https://artists.proofprofile.net/proofs/artist/455a6b0d-aa4d-4c0e-be27-c80f6170d2a7.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 0xc32d547f192436980c7bd33868d75495a70224f4bb3200ddd45f1707611eab66. 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/QZDQH2519129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde943cbe4a5dc5ccb17f51ce114c95557f53f5ad80964d3537a986fc5a6dc7d7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDQH2519130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df84a9291d56c3f91afc0c8c816efa9390a47176416052061e03eb0da1e2c36. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDQH2519131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a888c7b9a24915a38ad50032f247cae460b1d89c7d84d40712b215f580e476f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDQH2519132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4753a2bb7a475a12ddb099bd0aeed523d8048de79a7c43bc6e1128aa6cd4a41e. 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/QZDQH2519133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb551e27d6d96c0d01e094407a1f94e61c526c49454d9b60994db001d5da1575a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZDQH2519134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07c56992c514bf0bc945ace3e4454938b41b12c2fda15f8a60a5007a64c4102. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZDQH2519135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9c50a27232cccbf655390c461d82522b3dfa52f6ee96d97ed9fe7e99680cdb. 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/QZDQH2519136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8156e620df98d1fdb453dec74d0bb4f92c4cd6cbfea7d49880b7b2963d7eb7e6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZDQH2519137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acd1297f4c91807f5d5575cdd24981c4d5bbb19455f10869d581cb00625ccb3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:19:58Z), 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/QZDQH2519138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08eb20da29e00ddfb0cfacdeec523604a4a39f53128685e77671482ba4f62c0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:28:29Z), 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/QZDQH2525259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71e4e5e46e094414af4dcc5874100c62ec1ba2724f3bc4070db7813aed9f1c7. 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/QZDQH2525261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b757315c34cdbf5d897a0fbe1f266b41635f271dc3a5f2f92f947887951a1e0. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZDQH2525262.