Across the Atlantic is a 1928 lost American synchronized sound romantic drama produced and distributed by Warner Bros. While the film has no audible dialog, it was released with a synchronized musical
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 0xeec044f1865d75c395494a9cb96cad6e18e561d99ca2eead0fcf40dad4a75057. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10ec2df8-653f-48d3-ba7a-a2dd5e2b0b4a.json and https://artists.proofprofile.net/proofs/artist/10ec2df8-653f-48d3-ba7a-a2dd5e2b0b4a.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 0xd8aeb6e798fbcc5470a13548f3c977fce9b4e562ee67b3d2b9e18d6280938a4b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCACF1526751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a02c7e3642a3bf8255fd16e9126eba1acf4edccbeeefa6586bab3753b813bb5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:45Z), 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/TCACF1526752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe762fab138ff0b6211c42f49dc61425e8073f408a0f82dc6a381ded7a26d4aa2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCACK1578697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773f3a9eafb20119781532cd41feb004b5b94ad39a954d396e3d94f59a02f71d. 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/DED831700833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35ee2ed04fbd491b4e49b8d14ed2e6d601bca99af70237214935389f69d300d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DED831700834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086ae6f3b037b3653fd76ca0b3d3ac07e06e5bba7bff20c5896539539fa1c3b8. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/TCADY1820889.