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 0x35414a5e082c28f71d57b73ecca43cbd6c8a398a2b920cc2d23d6cb89f16b444. 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/ec4bca7d-6820-4543-bd16-7cf8eebedfa3.json and https://artists.proofprofile.net/proofs/artist/ec4bca7d-6820-4543-bd16-7cf8eebedfa3.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 0x44fa180cb7f4d76cb2c2b609410c87ad79b95a474a577a720bc31adaca04b0bd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJX2364743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ff5bdfa08864a87ffc2fa04ac689b451dbf2b31854f70f101af5ce19aeeb7e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJX2364744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0a77e0ddc9e0f83c66999965435206001c8e1d18feaf9c1b888c99498d8845. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJX2364745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce69d90bb2ebf58b7809a550db361381f1715dd4a81df044917f32ce8838d00. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJX2364746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca6d8bd417ddefb07141b9a36bfacc676e5dbdaa6814260d5226f0049cc3356. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJX2364747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca27863c1154e4bea3419e208706d55af95b02be3c46bb77b23959cfdfb6ebdc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJX2364748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edc6bffd82ee5f35d643f0986222e01bc77e958978831d906f81541f4cc0b26. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJX2364749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2951c95a8c91dd04e87c22ec4b4bfa3e2a3c6c67672252fd4a23a088b03943a3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJX2364750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955bd9a99dd38e2499234dd4194bc1726f3cdc4ce1a7584209e3da4b22a76a9c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJX2364751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5b448e081e7d47a3111e804a25b7f3419bed4db9527d9c71337efc9c88f9bf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJX2364752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f73be98a1a46449eb7d6e11b8c6ad1ba0739a05591433fe798f2d27ddec0c5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJX2364753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c136039e492ef6cb9aeef22a03741a37a4d061b860b33325ed7d5c379d7e1d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJX2364754.