Christopher Cross (born Christopher Charles Geppert; May 3, 1951) is an American singer, songwriter, and guitarist. He won five Grammy Awards for his eponymous debut album released in 1979. The single
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 0xea79a6ec59049c0cd1c425d0758fa705f7205bc4ef98d19ae92565f94be98eed. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7ee5332-738c-412c-9976-6e633151033f.json and https://artists.proofprofile.net/proofs/artist/e7ee5332-738c-412c-9976-6e633151033f.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 0x9d0ed42452e82302183e4339e4c902ff98c84789e36548239a6a3faba6b6dc7a. 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/USWB19903178.
Arthur - The Album [Original Soundtrack]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e5fa5f945724e3be437b7b9d275e953547a262e7f1172cb87773eb49fe2008. 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/USWB10800109.
Ride Like the Wind - Joey Negro Extended Disco Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc380bea86ff9171b801a05380c633ee27bf6e55f188e4c76634665b41b59f2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USWB12001226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90eed793b18dd43be29596c715eefb9a765b2e1fad969a4da00d24faa9f4cf2a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWB10902995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a439c9b85af3fbe2af9825c77e33d4f20618b59022c4a003e2cae7c95ab111b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USWB19901342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e5fa5f945724e3be437b7b9d275e953547a262e7f1172cb87773eb49fe2008. 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/USWB10800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa795ade0441071a21fbc761aadf6e90ee19db65a5262734603da5d7f9d6bbb2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USWB19901344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5afc2aa9dc51d5d47680c93feb2c4c5f0023dd3f57104f9eec8bee5eb479062. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:48:35Z), 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/USWB10901940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e5fa5f945724e3be437b7b9d275e953547a262e7f1172cb87773eb49fe2008. 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/USWB10800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a439c9b85af3fbe2af9825c77e33d4f20618b59022c4a003e2cae7c95ab111b. 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/USWB19901342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a439c9b85af3fbe2af9825c77e33d4f20618b59022c4a003e2cae7c95ab111b. 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/USWB19901342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a439c9b85af3fbe2af9825c77e33d4f20618b59022c4a003e2cae7c95ab111b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USWB19901342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43d1f7091ed2cbccbd728ca18a11ece5f1415c49e6e07fc21411c4640bd321f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USWB10106590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39cdc1d16fef346548eb9c396254ef77d4b0636d47aba2fa3fa7dececf277dc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USWB19901340.
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