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 0x1e9c0fd8699ee7471211f25fd3bf815476d51fde7cef5f08d2933f7429b2eefb. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88e3bc1f-c833-4eff-a35a-266ff378ba60.json and https://artists.proofprofile.net/proofs/artist/88e3bc1f-c833-4eff-a35a-266ff378ba60.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 0x01e2719c32be8302a8ea0311379972b6bd992a06bacd1e02f9e239fb9886131f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBLFP2596229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc331ae99565006c555e8910fde1f4db1020cf9b380f99bdfa891c02837385bb. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:48:24Z), 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/GBLFP2596230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2497caff6cdb21f970c31cd3b32057763d7c6c0e0f8e5fe324f5c2762442dc. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/GBLFP2596231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c839ea9235574b4f40c7fcd93d5c99c0d93c5cddfd64572b5e3f3f685c5a7f8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:33:35Z), 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/GBLFP2596232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a47a084b98aae980aac518ed5580da3c80adfaf014dad5ed9a94cc80ef4bf63. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBLFP2596233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccd9a496b52315a01b6386efb4ddde13d530617ae82661a2d22f911e6487bc2. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GBMA22529753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08a1881986d7f8d9f9ae22992554cc9cc8007b4c7151bd6761f3ffb2eacacfd. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBMA22529754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dda9d1d65e3bba2c10037ad0893c3dbf1ad5f5245336b92ac0ffdc84ef5a271. 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/GBMA22529755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd040841e1c298fbb0738f683290d0261c4d1caaa610df71eab1b50a4f0269c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBMA22529756.