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 0xd6ab079ddda92c020aeeed8f411b94735d329322508ad0ba793bfe6d5334896e. 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/af769d1e-22ad-4deb-bb05-a0c512bc69de.json and https://artists.proofprofile.net/proofs/artist/af769d1e-22ad-4deb-bb05-a0c512bc69de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
What's 2 Come is Better Than What's Been!!
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 0xc54dffe5128b07b1ddbbd9a006743fd03bba1db0780d0cb1030e62c484aaf6cb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US4Z69907203.
What's to Come is better Than What's Been
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3ca515b4c895e3b900bc5e541aea46338d166813fe67abe1d2e4ce55c7b4f7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/US4Z69907214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac28e58c84b4d75e8772ad8109bf75dfef7041472d6e8d03f0dbbc1f2427432d. 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/US4Z60110802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0597e68996fd133ab3061dc40b88d3fc587c3dce94607701fe88149019043e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/US4Z60917906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92191f74ac8d2daf3a62d02abe9b3ce7e2137c3df1b434cc84aaa6ba8436f95a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US4Z60917907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4385ff2d8975853b155eebddcb94ba79edc5b2397eed44c2ec2b069c258585. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US4Z60917911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0041433aca5e0953340dac057d7a37f5849f059c006b95663ad9423ee1ea60. 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/US4Z60110801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2107a33e6c196f51946937130bc16545f27f40f70472523952b9169927d1e207. 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/US4Z69907205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2878cf2477d108e3bca8551ca5d740f31aba28da3ffce4c052963031f032d577. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US4Z60110810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e3ae2b5d247256b7cb206a925d5c8d80f45f467046c00043dca1a59fdbac51. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US4Z60917905.