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 0x46754c8d6c5cf42e5a4db63209e4b4f9578cf4a325504c9c52eae7f78719434e. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eed42c87-148e-4688-ab1d-f4425ef3cbc6.json and https://artists.proofprofile.net/proofs/artist/eed42c87-148e-4688-ab1d-f4425ef3cbc6.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 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 0xf4c6547398216ba29bf1bf3cd2418ed443fd503ed7fe0f46725d9fc76872ee33. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA82499606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842d4ca88e75be9beb5d26ae10ece557481d14c4de9436c59912d62aa54034a4. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZDA82499607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ffa03394e3a27fc8bdb81fe58ffa2a5168d24d599a81e1095147880bc983fb. 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/QZTB42488717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc2b9241418823048a3f9d6389ca8f53c8aa67f8d49acf276d1dc28e1fd38d5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA82499609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311f30d27c3a35ee4fe49a5006dc79c85f0827de4220fed5c52bbb8facca694d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA82499610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab4e47f4af72077933b74f0c60cb4cc56f59515f805a228140b687adc1c32d0. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZDA82499611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb2f9aa62ee0af025768c28d82947641cb1c975c540f8fabb10c90764c254db. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZDA82499612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c9ccbab6c212a60fc1313cc502e07cc7c7d1b532423a7a335eb92e5b729f0c. 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/QZDA62183337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b72eeec3ca42f3123c68ad617c60f01b2cc8284d5d1911a391c78d7dd34b18. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZDA62183338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766b7b4b475cbe42c244e4cdc98d98f604ed040e599245f7cbf40b0f4aef272e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA62183339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21555565f40ab175a29141fcda798442365e7f548f22bb3d0e8f4ad0df6669e4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA62183340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc098dd0833a1fc6b6bc625e958ff1524e01b8270a7773966840c7f5d19a2d9bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA62183341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0669a1b549626a1490f660dfbc142754fb381eedce8b82cddb82928e2de63d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA62183342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3d59e92f08a86900ba448d36ec365a50be7dcd7024c546d62a7ab4dea64b96. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZDA62183343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167e5d0c414373bc7ea72097f5c5f643665bc26158d80d1121769acfeec74679. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZDA62183344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78ebb0a3306b91d975ffc1eede7492c54481244aaedae30d6ec5dcb2e395785. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZK6Q2349351.
Generation Blitz 2 - Concrete and Chrome