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 0x143490ca0c909038cf75ca4b673b037f9f9f18aa501425690918bb724514d6df. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d31e9abe-eb1a-44f6-b068-92b8b1332e46.json and https://artists.proofprofile.net/proofs/artist/d31e9abe-eb1a-44f6-b068-92b8b1332e46.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 0x9bf4ef980880f6615373ea6876953ca7d209fbaacff5e64b86a5bcbc8ae7be86. 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/BRDCW1300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dcde65f4c0882b2928d0e88b3cc34db14a392ef965ca2a0cbd4c19c6a17d45. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/BXMP02300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b72d88b19ff9dd871f1096d787c08f2e131a0816f8b8053e2cbabe90a21f19d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/BXMP02100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8ce0836fe038f6498adabcd8c127d1ef8683c1bb9e23ec7c3b7e4a4036c29e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:11:21Z), 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/BXMP02300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c5c6bf39b7545694b5edd6dccbaa383681f8fa0a78a52391582460a980810d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/BXMP02300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48a1398f2a444f77f5dccf63f69f291fb3464d74a412bcdaa401af0cef63fb1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BXMP02300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632dd640c78877b85760631e47c48cb0fc5bc7fa9b7055ae7f2ce0219d104cf9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/BRDCW1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67567f41a57a6e17c76ad45c588c229c03ee05f9abea4a20d659fde99c4acaff. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/BRDCW1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db1657065d71448c81b17068a77e524352e69a1a08c7fd6b4128c34f2944464. 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/BXMP02400001.