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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 0xff6aa24cf3b6157abe0ad00a510a66993d007c72924cf80b862a25098bb842dd. Chain 2 (Bitcoin): anchored in block 953996 (2026-06-16T20:04:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2fcae2ce-5fd6-41fd-b419-191fbf226b8a.json and https://artists.proofprofile.net/proofs/artist/2fcae2ce-5fd6-41fd-b419-191fbf226b8a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chopsticks & Rulaz (feat. Jojo & Uzzy Marcus)
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 0x053ff3470508178e1bfc522204b7a2a6b9657dfb359cf7451771437006bbdc55. 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/QZFZ62233239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47659342643f7cdd0b4539eceaa3dbb9bf44db89b1f0cb31e3d9dbf545bb7d0d. 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/QZFZ62233240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddc9dec71cc26f5d79d2cc09d166cbfdcd9d0fa9fd8668397b365eb9371419e. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZFZ62233241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff345402f5d6192e9563447934aea93a7e0252c9a5c89a9b316d4fc404d93cd. 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/QZFZ62233242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdf0aa4dfca939deb156d1c806c4e82916bfccacddb3430285a9101852f0d31. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZFZ62233243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ab355a41d372f64e8ae590f3bfc09a3566c31b5eeb82406e1b66e5d67db049. 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/QZFZ62233244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf65d6892a6c45a0fb0d0cb4d8ff35a2f4a01e60af365bb0aca128078c71bdf. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZFZ62233245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe33919b6de3d3077fa98a238584a3ce432fe3725471e4289fa9fd39b830d39. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZFZ72043300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfae007a8d0eb04e2968eb2d27e4eda9b7f91bb498eaf89036e3dc941ba7f34. 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/QZFZ72043303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77af990a8c931eabb586fcb5486ad244a1dab78d9a1300365f6e516e4fdb9e71. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZK6J2251135.