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 0xd010c29d596b7277c9dfd6308bdee0de1f153b090f5aa830a73e3783874a8433. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f8b3dff-fedd-4802-9615-36d498da763f.json and https://artists.proofprofile.net/proofs/artist/7f8b3dff-fedd-4802-9615-36d498da763f.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 0xb48520e7fc02a1b548cc88649458985b869f88239d744b3260f7e87a8cbaf03f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFS2523031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c06047313b6664508c45e54d95c7ce9e7f8926f066e9f120be889c031303432. 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/QZWFS2523035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3187b65b905120d7474a8efc74192cccfd2da6fbea109550da1914a700153bf. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFS2523039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639bf2c1fb355905aa0fe139a5cf16cd0232096cdaaa76ef782a0d5eb4dd099e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFS2523041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5089f59a3a977622822a743558ee17dfbcdb5b918e378ffce11a808c606b3888. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:43:49Z), 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/QZWFS2523044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810bc93cf04070cd02ce498316d68c3f339260e5258d66fc262e3ef636e6fa1b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFS2523046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556020277d9811a28bb8fa18f849ad2a8c3c7a90c2658ca86b0ce9a99ba7956c. 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/QZWFS2523049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe2e080409e3ba16e85d69e2079f6918c09f2f09ad36897289aaef2955086ae. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:00:33Z), 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/QZWFS2523054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160426d21d7dc61b90fda2bad438b5fbb0d1321dbfcf757086383a8f4d63a598. 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/QZWFS2523062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad81bcfdbba652f6fb30cc52c13359f7ff1b8ffadb85a7efa6c509f6a2a6e09. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:02:31Z), 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/QZWFS2523066.