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 0x3aa0e3eeacf45ff07e7937c4d58d29833cce1ccbfe4305ebb1ac1b746bcdc653. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfb37d58-6d88-4960-a404-22b206f88f47.json and https://artists.proofprofile.net/proofs/artist/dfb37d58-6d88-4960-a404-22b206f88f47.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 0x443b4bd1243e82bfdacf1dbd2a4c0ef3d4f6c8145cf1a1b19445c70eba2db532. 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/QZHN72383725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc729e7875e881d4530632bb14cda2f18c71402600e98e8ac693f3680fbcb87d. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZDA52336904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4716880d46a584781ef9489652d0a399153d5afe67a3e0ddf028b8b14ff326fd. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZES82385599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a658f53226519cdfd38cc6473659dde96323060898af7453bf5f4085ea1700. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEZC62400377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84cdfa975bcf8ffb59d58b5c3858a1e4c8d852fd7078bff16bf75934988a738. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNWV2422033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44951bb54ab2d835bdd3d9238a63393ffbca8b95c604f2c73be459671b39d10. 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/US38Y2426798.
Mirror (with Kota the Friend and cr1tter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575cfc1e6612f0c631d1e030cc22e4722f99bba43a949989e72741bd25351144. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA72407056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34bf0c449d5e2fbecfad667f98786004de43dae5ca0f98adf6bdef4198a399b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZRP52316178.