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 0x2161e7e73ec069b6c05ce0f1d5897cbe9d31587d422932570f4728d56767affe. 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/2c29f921-068f-4e20-b678-0c78858054b4.json and https://artists.proofprofile.net/proofs/artist/2c29f921-068f-4e20-b678-0c78858054b4.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 0x7c32b08da3b3ffc3f54696d1cc3984ab5702620ae31d23a048d4b04996a0a3eb. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/RUA012000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b8b9e797fc3457893041df8c75c9c2a5d596cfe490a94f5e88d2e6b2752aec. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:01:24Z), 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/RUA012000244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf3ac9a8f5c5dfacf8d91e4b7a4d819bcfcff160f6c107c788505f998d61d35. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/RUA012000245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050a3d6272f8717bfa84ccb40cfabba5e608616dbc1961248fb41058892dc4bc. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:53:02Z), 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/QM4TX2158582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9311ee08c6efc0706989b59211a9d519fac86073f63129100422267661b899a0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM4TX2158583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1197bec7d341aff92a66cf4d4ea42a7628a2facbebf68e470f2c4a5428ed7e58. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:01:27Z), 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/QMBZ92146611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754da17952f13f58118873801e4cbf3fbad09be268b025ae71ac7a68385b814a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNJX2324552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b42caa76978516337c685eaef09f1b4a2c40a4323a1b80642bbe9f9ed5ae3b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNJX2324553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe522c5b4e9bbfba1c95d70944823f07aa8a17178f905f9bd596e4adab6cf24. 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/QZNJX2324556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aa39f9b4a701398a0b1a0d07fada82302ad50b2aa57af72b7a0d46d55c0149. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZMZ92584728.