thumb|right|200px|A solo steel drum player performs with the accompaniment of pre-recorded backing tracks that are being played back by the laptop on the left of the photo. A backing track is an audio
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 0xcb2a61c1e0d0c012983e8231d4c5e3e35468c52c8006cf7cc57c48bd9cbdbfb5. 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/69b0a4a4-f4d2-464f-b182-ac77a3d871dd.json and https://artists.proofprofile.net/proofs/artist/69b0a4a4-f4d2-464f-b182-ac77a3d871dd.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 0x08b848a958e287a6b157d908a1157f3c6725479ea7dad4ee6b02300889202e7d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZHNB2296378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57de8a28f07a9c969772b841fc21851e405a6762593c5d92eab8c4cbfe048566. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNB2296379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea9a4e8748cb5d43fe28aa6428e970d1d605d9a4253f218a81f7023c00f0720. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZHNB2296381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd896489f1ddd5b162bd9e368a8facece18476164f0fc24359cb51e93d7b205b7. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZHNB2296384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aef4088314cc4a722a6544443a2474fe5f2951e1a29e4c101eeef53d3d1aa1a. 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/QZHNB2296388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d03b093d9c8ce0374d16346c5b133dbb1e21e484cf73befa2d484b2b81e86ba. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZHNB2296391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c29b59ab51d97ff2dad8beef2fbbe652ad11df8f1cee7ef4b42ca05788bb5a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZK6K2256311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd14717ba70894aecd7f9ae69fd24d950485c470b2269a70aa3f8038ab4c6d14. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZK6K2256312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c978eea53d0940c0dcf9b812d4128d0c456d399a32c851bb596f6fb53e8b28c. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QZK6K2256313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c1955adde691a922ec9e0f0d0c3789e0bd7978c79866e1b8f81ce8149da827. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6K2256317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9318d293597f59537a916dc566e2d6407efcf137f44adace71340c57a6cb6358. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZK6K2256318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec40ff1c968482504f7985034103b70cd0a92b2127be12b46de6d517893400e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZK6K2256319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a67cd2d1b7bac325c6a05ec5f3abfd5a9c7ef34447cc2838a57457363281af. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZK6K2256321.
Open The Pit (Intro To "Mortal Kombat 11")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247262639aacc8db6d66c8fdecfb538a85d70a41e9b1d227489d7108cb3446b2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBA2377145.
ChipRock: Bonus Round (Chiptune Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6244a1b4d6e2ebd96c628081676158e5f378721133d7812e3498f7d3f8245e65. 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/QZZ7N2475952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f08b485cb43e6d82539362308c734d9bd9bfd70112da71d4d1e81ace6334f2. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZZ7N2475959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631029301aab982dc01f6937f5ad7d3f062bec92ef3c4b17af09576b79981028. 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/QZZ7N2475960.