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 0x06b5644e866e60018b64da1590a554c2d28ddbb831a880bfceba924bb6bd45a3. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f449a139-7e1e-400b-9c30-fa41586764e5.json and https://artists.proofprofile.net/proofs/artist/f449a139-7e1e-400b-9c30-fa41586764e5.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 0x4e6bf47978847218e0295cd953644d8a1f833934e7f7875e9b3fc46d7f34c5d4. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:49:32Z), 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/QZZ7X2564638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bb741a4bbb8c2e48bab8098f744803d250852c09553a3bc427af558947b7be. 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/QZZ7X2564639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6466dd2a668b458a841f61a71597926169980aa3aa72331fc791efedc421841f. 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/QZZ7X2564641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4fe18f21b62d829a3e84c895eca80b4899b59352b09f17edabf5cf3ff4e0b8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7X2564643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60aab08b30fd43ba4df8f8411d45b52c220d50c634ac3820774686878fc92598. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7X2564645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ba9a5485ccd828d844026c2f838b3b0436a9a39764c548de6c1f0413fbcc5f. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:09:48Z), 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/QT3FA2598221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9a9606fba5dcc5b3897a73f635b5a85823766c235b1912e6cccbb2e89b4b96. 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/QT3FA2598222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e882ebf8e5be981805c1c1dc943bdd34212409b888c8acbd679aace5092d7dd. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QT3FA2598223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca14bac6621a721b3ccf86ce263270e213f820acb1a11b3d3724b35dd3d6fec. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QT6E72526431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce71e138671ccecda515ad74dd6ec2fc8a009ef93df345c144e8146cdb2379d4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT6E72526432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497700817fb13ff1faef9b864b3c29e306defe129653d048e5a707cd5d7e387d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT6E72526433.