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 0xd8587f621ee926f057b31c7160def8885df949da80e100488ab0b68e22786479. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e22a1375-be87-484e-81be-5176706541e7.json and https://artists.proofprofile.net/proofs/artist/e22a1375-be87-484e-81be-5176706541e7.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 0x682dd08a5ba837b507ff607cd1ab02943ca53ff2806c7ea528567359ae7a527a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:07:18Z), 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/QM4TW1710804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c4ae8a68eba0abad432848d9d4f29719a9df331138882438d8cd6f765a59d1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM4TW1710805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63e04b13fa602536733ce099a65ce34956c9738d122d619f62f4e8f6ab9b4ba. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:07:25Z), 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/QM4TW1710806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf164cf0e8d49f0f95dccb71c89bd08c24f762ac24fde478fb46955ddde60932b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:49:51Z), 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/QM4TW1710811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe42fdac5650bfe1848b632cb0836db39e8259bd480b67bb5eafc675a0765d63. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QM4TW1710816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfb4c78bcab9d88a404b0b8d57011e038472139671f850bfd7633a2abdc3011. 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/FR9DZ1801865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bfb69aa3f2adb0931b1c53981f805ef39c5f2d2daecfd0ad8afc5f874ed148. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR9DZ1901576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf536b5535a557033813ac9988bfc59ed258f138b3460b138cf22b7347abe02a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9DZ1901577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d3f771b755ac524dbd75b23ce2347f303f575d6fb6409f3f95b54584f6bd12. 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/FR9DZ1901587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2506e0d6d923022cbabce432125f5d9975a4393694e89c4d8163482d3000d94a. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:37:58Z), 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/FR9DZ1901589.