Richard Dean Zehringer (August 5, 1947 – May 26, 2025), known professionally as Rick Derringer, was an American guitarist, singer, and songwriter. He gained success in the 1960s with his band, the McC
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472161cfdfdc89a94aad99fb4f78fe117747d375dc1386ccaa53f35ceaa85f80. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73752d7e-82d6-4efc-9c71-42c71b560b15.json and https://artists.proofprofile.net/proofs/artist/73752d7e-82d6-4efc-9c71-42c71b560b15.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d34dfa1759cf86b525be69048f5d14ee62916b59f02182df45e22261599e28b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USSM10021862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a015f640243a270c1e448d714d3fef77d92bdde8eed5b1e5ea77e46b5152d05. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USSM10021863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc513e5dbf6251037fb0e88020a2bd69e23aa57551b0bda5d858b80442730937. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USSM10021864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c63f76bbba244ca2cb101c9bfb58c91f648c2b07f49cf6a4226fc5266854cc. 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/USSM10021865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05561714c7c73eb1e274b9a69a4cef36b02e65e594fde3a2febefff366921618. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USSM10021866.
The Airport Giveth (The Airport Taketh Away)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778ea04481f9661fc544202f12443543bf2d904a3f7cfb5823f9adeb12dc5c5b. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/USSM10021867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6ba476f09c9f859016588a16b3c48945de9c74f5e5d378b2623a5bfe2f3c9f. 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/USSM10021868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69d960a46cb8246367059c32881a66c10470ceb159e3bdfd3f45ca70768e836. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USSM10021869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006e77086c5125412209ae6b3ce11e51401227915585fa4a754226f377797200. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USSM10021870.
Rock and Roll, Hoochie Koo - Single Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb19692785ded0abaa84145a12c9fb1ee9fca1b4b300d1efa9219d1ec199d28. 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/USSM11401435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28d5c88ebb2e84297e787b287411e291afafca5fcf52a41389497f912e652b6. 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/USSM11703914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b7a1c4aadaf0786ae763a7fd73cd8e2282dee88bc1d3f7dfc3c62cd392b87c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:06:30Z), 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/USSM10020912.
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 0xb2ade864543af8edc4ac9deba65fe74dfe379d2145e82842d2c547bf9f0e2a6c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USSM10021861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ef40fe23497a408aa790fbd84904b9cacd8ba1e1fd85c5b5f60f80b73b6039. 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/USSM10020917.
Classic Rock Masters (Re-Recorded Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27243869b970746ef1c6d477402a3123212016c2d8874d89ea56f929ccb7ac54. 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/USA560743403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591dd903920e435e8e4350d5e74c37bc0202731e213e39825a15e295e7d9fd09. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM7281537008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fc8dfbd9a6ad39e9d2631d91c74e759112435d257c1ba451ea240ee83422df. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USA560702670.