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 0x8f426cb0bd5f42fa0f26128829a6919fb2d3b5dffb44d892f95f83a3d196e578. 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/619189f0-bdef-4576-b6b0-e0e71702b528.json and https://artists.proofprofile.net/proofs/artist/619189f0-bdef-4576-b6b0-e0e71702b528.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 0x05d181107006469c13fd3369c05041fd17cdb6d7dc07501e0f1e60b3220f2c6a. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:32:52Z), 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/QM7281746609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acb09045e87e5d3fd5aa25b61e790fbc787def7bd5b507f7740f350ab83a3c2. 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/USBQU1800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cee89acc6f335134e5605f843893fbe3b6e581bfe93e4380d8a4deed82a628. 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/USBQU1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610488305bd3ac7e8acf7b0a54af8b9efea49f15396cd847a7e80cf5fa34bce8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM4TW2226497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd66ae8ef99eba941252bfa13fcd3c37f034d20eac2dfcfc97a48d0f2b51f47f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6MZ2261484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff019bbc0a8ae3fe03ae90540afb070958ef178178a0a7352c4b6dffc18f071. 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/QM6MZ2261485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b94a6a91360e3a9476bb2312073b7b0ee8a8bcdec23b46a3c2f72075c3f39b. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QM6MZ2261486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd564e3b3ff2c44913b5da7e653bdb4bb9f709b372def76838c71c0594be77390. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:24:37Z), 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/QM6MZ2261488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c5aee7ca3c1dd988076063833c2fea40869b8c42a52cfbd2e098886400eb0e. 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/QMDA62299789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea07e44ff5d63611c2f186bc3eb94b1a21f069830da06947aa6a6d35586a1bd1. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:02:45Z), 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/QM6MZ2579137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2380b23536f996bac03f79b219bc63abb75a837d59d499c28424cdbf8d7e6e4e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM6MZ2579138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca21738590516b7b3517366ea3bf2a3d33493ccabb8cc092c608e729d98dee0. 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/QM6MZ2551271.