Punch commonly refers to: Punch (combat), a strike made using the hand closed into a fist Punch (drink), a wide assortment of drinks, non-alcoholic or alcoholic, generally containing fruit or fruit
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 0xadf8d052e7d19de5729f071832717455de3fc611f04f4b122f733b9d224a9444. 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/af1a4a0c-d1bd-4a58-a269-864260b658be.json and https://artists.proofprofile.net/proofs/artist/af1a4a0c-d1bd-4a58-a269-864260b658be.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pay No Attention to the Man Behind the Curtains
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 0x05db56fedd6c18362f9fd7729293ed630a7d65da0249299aa47b235cab3422a2. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCAEU2011083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd172a47e26f644f989d612a32580d4cb3a7bf4fab917cd9281d5ab5a6f1852a. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZZ7W2483420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45fa75f46536fbe00634aca73ad7cb15c2a66181b0b0bac6d720e858b532a75. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUYG1333059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69e10b09039c09b8289f88f0de0220e8ae4893acb93cc76918e54b599676370. 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/QZK6G2434450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274243c06ef48780326560a271b98dc23e4747ce5091efa27fa673db9f5787c0. 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/QZZ7K2487030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d52dfcabb94024fcb96ea5dce1bb0ad9217d923244b536d30fce677d1537218. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZWFX2462831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabee3818106cf3565ffa1d06b3a9fc8af67aeb2cfe550a2c58206fcbc612a67. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZK6J2403207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e732285eef49a6983060190e10b237584dfde1b62056e489eb5df532b14111b. 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/QZHN42439857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d204261ed7bb5d7ffc7401401da7860d4a3c914d198c9fcfbc6776f2da1c8b3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB52284463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f5a947524bdd2d242e59ceaea44b8b674ebdc8e24bece709ed6b5f73c028a2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAIY2427314.