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 0x218f2cb29ac30c02a215f5b8b68928bd07baca3444c20de888f69b21e76f5206. 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/06d71c82-0995-4dba-ae15-39b51e3ea3cf.json and https://artists.proofprofile.net/proofs/artist/06d71c82-0995-4dba-ae15-39b51e3ea3cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Highlights Der Deutschen Uraufführung 2001
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 0x67f30719a2b91029bbf4db898244d0a6fa620d41744976584310e41b48d26550. 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/DEN120100705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeea979128fbb0abd5938fb5bb8aa8ab600a4cfbed8b74b9108f00ab0992629c. 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/DEN120100706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa942c5808de217eedbeb5b2d580abd4a2bc5733f72508bf872237439ee7755d. 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/DEN120100707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7476d7f1fbfd801b6ff2de3dd1977b2fb5b235a4eb7379a21e7685f1e0aac5a. 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/DEN120100708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dd9d1dfa861757caf94a65bc17eb3ee24c2df89d9a714d5f504ef960edaf7a. 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/DEN120100709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47cc8b7d0865ae2f3dd94ff1178c8ea0ec09acf67add03c1278758170c013ce. 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/DEN120100710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6426a79eab5532eafded6228dc578338c53b6de3a60bc1d1fcccbe404feb4ca4. 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/DEN120100711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee294b474b6c033023e2c4e123c4b69f4b1af9e0ae11135904816baba1398228. 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/DEN120100712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecda65a97bc5087f0ad516ab89ab1b1ed905cc96df8db78b8c97e2aaa59ea72. 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/DEN120100713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fbc3f2d277ad3b26995c8c54f9e1565d9213f564803069c28812d6bf79c449. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEN120100714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb657370a056e753e72921fa2ebc742bc9783060372aea636581ccb3c13a31705. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEN120100715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341596c7a8f47ec813b4e56f9206ef22d06a2815f5efaa6795ff628d3024bb02. 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/DEN120100716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd96ffe12edd1f54e20ffcb37d9620a4506ca34bb08b9df74e54caffac71479d. 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/DEN120100717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32632d7482db70f8b6656b5186dede3bd6f3cde94a36362893c0a5d7d99cdd32. 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/DEN120100718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f909c3717489e42c8c20d38a7a129b4c38f0c2ff9f311ad6aa9cb5b9c2d1e49. 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/DEN120100719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80741740df2a46b38e3c8fac6ba6c5ccd35d9bf9c5a12e95eb6db2160e8cdbc. 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/DEN120100720.