Nosferatu: A Symphony of Horror () is a 1922 silent German Expressionist vampire film directed by F. W. Murnau from a screenplay by Henrik Galeen. It stars Max Schreck as Count Orlok, a vampire who pr
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 0xb20f8fdb5f1485c41a6727da3e9eced615a757aa16829c3dec9c2ffd7eeda302. Chain 2 (Bitcoin): anchored in block 953984 (2026-06-16T18:08:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bfce021-5d9a-49f1-a75e-455c41791ed4.json and https://artists.proofprofile.net/proofs/artist/2bfce021-5d9a-49f1-a75e-455c41791ed4.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 0x01a9b7e1b32e7a5b7223d9539618e0e16bdb047832a3d5ab1d9e2476de59708b. 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/USA2P2009724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164336023225bf85061b480685f798e18666809c31255b029b1931fb075f9380. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA2P2009779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7e38613269407889a69c5b7baafd6d83ce4fdd627787f25e3a4227f5ee0ee8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USA2P2009778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505da7dc7bca5d54d31ce3c4e2a61d4b99bff8d3cd4c319e89528e8a806c4453. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USA2P2009777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf153597680b47c6be5edb562f9fbdb6f43821b63d02571697323fcbf31185f47. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA2P2009776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51032ca4d00c8c7401945d015c33b02bb3f38be36d7702f4071b7b9387e81a5. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USA2P2009775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32134b83f85e3e123c125a4e5c6a870d5bc0deb47e4f20bead97a8c2e7c2ae96. 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/USA2P2009774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575fb69337bff3e4ceb014d08d9f00a4134dd56fc706274ac8de506de2bb4603. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA2P2009773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f1259d0d0bc998fc5937131130a14bd912d11245a8e964ad136606304aa993. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA2P2009772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e214fc8cde121d073f0aef47f21f1cd46c05657664c39d53c3787a55bc099d3. 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/USA2P2009771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84443adb675319d3f42876b4776eddc3630b9ba52a1d5ced43d12c17baea2fbe. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA2P2009770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08535e55ee7a05db91736d833bee0881f73659ff4c77ec2ffb53e4c7343c325. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA2P2009769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33480750d68ba8b840bd90da6d000429a2004e2b89638491730d181ae8127ba. 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/USA2P2009768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa168e87fc5d82f3067f2b2a6f59edd6770818912d6adaf0e07e8f275b9d0be10. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA2P2009767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eb330220e415d38e8628c6e71aa356f42a454d35f22d91d12091a5378c78b4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USA2P2009762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba75a5e7717168e4c6de1e4aa742c527b2bb8f1d98ceaa16de55426960a72610. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USA2P2009760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935b4f5e181cd35415805d5bd26ca274c67819c4032ea78fca23932dbca93415. 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/USA2P2009759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5705bd3cbfdb938ad1f75bc83fc407282861ba5a2fa6e1f0c08b7ae7ec5794. 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/USA2P2009754.