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 0x4aa3c629e8768ec7e7fc16badc61c5e613fb8adc394182fb145bacc44e79b553. 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/9aa4dff5-2985-4eac-b827-8497532d6363.json and https://artists.proofprofile.net/proofs/artist/9aa4dff5-2985-4eac-b827-8497532d6363.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 0x21c9cae82a2c5182ee8a04b1f5a595501326c22dd5a21addea5f2e30952a6a15. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:29:25Z), 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/NLH3Q2000645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03715af46cafb5866a78274e8f357863801efa23a8af133b2958c1776c7dacef. 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/NLH3Q2000694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b53494f82990cf2826a71ad775fa485ec8498664dea722c7d2120699328cfb. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NLH3Q2100830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82f011f93a6593c2e846028c02ba0df0e316232275ed18476f107270d82c5c5. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/NLH3Q2100953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d832ba0bf26e8d34f71de4372e4a3dfe03d6e9e1798470ced21cd81dca2693. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/NLH3Q2100999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df32bfdbdf29d06985ef601db33bdcbc1895c30df714c4174c60f37131e7a18. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLH2L2200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f184128656005a470ff04d039c4136676be88158db431ba9793d728c6c70e17. 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/NLH3Q2101092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4a87fcab3607d40f4b4a352c8f46902d7be5a1b7584b66d4c32fbac8a6fa9a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:31:36Z), 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/NLH3Q2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254cc853970d134c2152668c219de3b7f9dd4e22e375665b9ec22a7c77222c49. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/NLH3Q2300101.