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 0x5ce540ab1e3a9d07cf4010053d7e13c380035bc7e9df24adb63d80c1fe9773f7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f0b5d7c-9c76-475e-ab0d-a6f3e5471f04.json and https://artists.proofprofile.net/proofs/artist/0f0b5d7c-9c76-475e-ab0d-a6f3e5471f04.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 0x92d689df918d735f1e25396c980cd432965e76d5e9b9db91afbff99c26d5780e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMEQ2281287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c88b6a171b3aaf0f84b2e71de379b35f0e10c88f375ec9dc75f0388fc7143aa. 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/QZMER2239446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabaac03270530044704e7ab101e0bfeb2f0ad277877a70a9cb64a8a5d6b41cf. 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/QZNWR2218359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b06e00aaeb8021919b8d0cd8e02c214726c2d8e71e437d34700851e739c6f60. 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/QZNWR2220393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ad0752cd4f97ede69dd3f87f589fed5fce2497dd35b819aede9db37f1d2749. 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/QZTAS2236647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9630569a05abea896299de6d205c1f5eed2156a83cb0e176a35e0c69e11ba759. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZTAT2215729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57712f59d3aff3367817f2eb64d5f225ae634b19fcfc82cad15030993860e392. 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/QZFYZ2301480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0461639605db026607b22c3e50a7124c97784faf5a5b611bb3f6225ec2e017ac. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZK6J2378274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03903512f0c8682833e4abfc9f93b348ab6d6f68c04d57264b28accb6713749. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:59:16Z), 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/QZNWR2392172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1a6ccf524f1f6320d7de8035fc7221d347caa19d1593bca07a76d1efd004f2. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZNWU2392424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea7c6276792b1bdfc1633cdcf4273e534f6606c76dcbefbfb07f8b7a324c94a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:22:49Z), 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/QZK6J2487142.