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 0x2f0514a47f3730f585e63d1ae2ee11dea7a88fdd48be11daf368e8dd7e899c92. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/846203cb-858c-4c14-84de-7ab356f1576c.json and https://artists.proofprofile.net/proofs/artist/846203cb-858c-4c14-84de-7ab356f1576c.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 0x5fdd78657dd5245157aa116895d24f67b728a6f6da8065de3ff1215698d564ff. 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/QZMHM2449810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9ac876927182177e4d24b8c84b5fe05024de3529c8b3b858495b16a2b70528. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:02:45Z), 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/QZS632498767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf482ac74186dc3f1202b20f655ccb31a10dd3a0a3f8ccfeea2f87ed1aab6ccf5. 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/QZMHN2499263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa561f4b6332c2645d0b4b7489172c66b128e0ab98779782c989e6f4af6382c93. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZS662413022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45880a568a2b4d57f8598f8e3a935083495691e9a4f57738ece8099ecd3ab990. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZMHM2402545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed90c8dbebfe6a1ed4ae28d28aaf95e59efebc7e06af943906aff2315789ffe. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMHP2498804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d4d143716a0cde3bed4144d5e7f8b51e7be087b49e2ff2118080de907c0ad8. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZMHL2447179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99643e64ad629e4fb3871a340e9c8b74fbf8635a89018096947b7eacccebb00. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZMHK2477862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c044e5d6ce9d0907f4beb59d1e6c372a0df30889e4e2de8297d9a75e9f24411. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZS652450694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d34462c7d3975c782f3342de95e13cfe9dba145b9b352368d4e7ae4e63f6c2. 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/QM42K2491132.