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 0x0d4af92d17a3df180553acb0f08b49298abdf78079c805f330503cfc46011831. 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/5c08b863-3de6-446d-8000-a20b3fd83dfe.json and https://artists.proofprofile.net/proofs/artist/5c08b863-3de6-446d-8000-a20b3fd83dfe.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 0x21781bb5b8b1052850b41afa3737288e62b25b2531a4314b14903020cf55a643. 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/DEE240600022.
Ein Stern (Der deinen Namen trägt) - Single Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2913498e7b054f1cf79831731172f238192be00533af1798f97e37746f6bbd7d. 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/DEA760700801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b0fcdeadb7c34dca1528f0570732de9dba408b4d0edf0c54f35299704bd5fc. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEA760903410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd731690c7b0bfeb1a26a3efcc3d90b5edb0dc99e1808da955ee5f14dec644258. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEAF71318401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847fd56955295e9689a45d19512e1a345492d980fb86dca52ea1a48761dae0de. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/DEAF71318406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dff0edc2dc64dfb1ed1122f7f3a67557b07857e27014dabe47b75897a11bb3. 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/DEEQ81700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fc17d1b5e9879033b484cb194c56e51d209915fe1b7dcac856149f94d70f38. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DEEQ81700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23253bef2936e51b8c2f2a902f493d6ff62782632129d1fc98d79c7f85b98bd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEZ921500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb483b2947a46bce170c085a300a4a437d4bd607c7a9499850436d7f77993cf65. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEVS22001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54094d4a259993d87e587c06e0eb093c0de0b98aa272b61d1dc566006144d6f5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEEQ82100068.
2 Millionen Gründe (Pottblagen.Music Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42655def2b64cfcf27167edf98e63bb49123ef03103b009f4563b84d6b9a19d8. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DEEQ82200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576c49dca70b88b3847d6d515c27ca8ffc0d4f8dc29ca0dc45bb425529685caf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEA760700804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59835d9598f990bdc7a9d4433249c2f4f31b604ca7e292d100d270660b022f30. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEZ921500226.