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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb5028a8a7fb43d040b381e6a4711688853307e54927f8ef514178da20fd8db. 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/6514a9c5-38b9-4765-ab89-87fd8d778007.json and https://artists.proofprofile.net/proofs/artist/6514a9c5-38b9-4765-ab89-87fd8d778007.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924e5b229aa8c1840f25ed2b66bbe7c0d0a690cabd3c20673d8d586263d2a1bf. 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/ES35A0800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ecd7ade64e7ab023566e3b4abb8548ec3e2e94b57da037b6aa7f9b6a44615f. 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/QZNJW2470248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b000ec20fee4a8d9c618d68c206c6470c70b47d4dda6de38e97705beefb376. 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/QZGLS2465539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f55008414d414b5338626fc73367d48f95f271a7d9b27d7fbdcc5bc34deedf. 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/QZ5AB2427919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38eb2ba7f06a6133f35b30916bae4ff4131bdfac8ce0154f62bcf10d37ba3e37. 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/QZW9K2387056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7038d14db5df7bfacc8ca7088197e1c6a85f86a0e64ac9cf3a802e24861500. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:49:12Z), 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/QZW9K2387058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05257cbf4bea5a347ef214fee5e38c06b480255198957fc725fec95b17f7e67b. 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/QZTPX2396799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7fd66adcd4ec4a28c91f18496b5483017707864ccc3d5349dd3b1bf2091a92. 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/QZNJZ2384401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b952f0ae1640ed31b3a89ed9033b245cf232f20b5fee67ed750d8349add936. 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/QZNJX2331944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b24193634b7d9c4b854bd34bbac39f8172f30928d41bfd5d9ef2a9458f8c9c8. 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/QZNJV2325645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5298dc118e72feed5c554f1153911cebb4c0cba515d3521f7c2bcd97872af509. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:04Z), 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/QZHZ52284928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfdca011cb054226f1d1f0c0963d2688ddfc342d31e33e6c6df8e350a535940. 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/QZGLM2258641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d97781a250538032d5dc3cc2b904a9470ed2ea1553c97909b09c92c32b34c0. 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/QZGLM2258642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd524b5c91e500fa968b256fe98392516c0a0b12444c0daade419c3271ad3f1c3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZGLM2258643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebd59e9c51fb07291cd844b979908c50b7291f987532110e5af11d600ff9465. 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/QZNJY2023862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94abc08ed3a7785b505c4c9a856942cd1e2ff33b7dc506eba5e646557fc3f9e9. 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/QZNJV2087031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987ba59c75aefe0bc45c574e8ee72a9f7a777e983c10f2afd68fe1d9673fee2a. 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/GBLPF0266354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594fe6eb3ea6bbf939b5e62d3ff0a9439408249fb83d8ff8216b94c8ee5cc029. 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/GBLPF0264613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57df395f4bcbf65bcd84d1f60d3fc538f9c634ea051818865d5513252067e5ec. 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/GBLPF0257642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11943a444213593457cf771de7b45389ec76437fb953ed0883834b04ee24beeb. 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/ES71G1947131.