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 0xc021b2e8d7c3f0aa4c420f33b8b836dcbbfc676869d1e000bf17f6804431e9e5. 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/b59483a3-8ac4-473c-959d-94dfe51b926b.json and https://artists.proofprofile.net/proofs/artist/b59483a3-8ac4-473c-959d-94dfe51b926b.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 0xadc44b8781918ae35e620b1c69baa8e370f9373301bde9731f819bf3ab8258df. 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/DEH742403651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51358bcbd61470c223885c6b5ac4c9a0ffca118496683e1095452e0e0c204dcb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEOV42200169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6180f1195ec2731f9434f0900f5319baa2a39f87f3bb3e362632e23fceec48. 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/DEOV42100850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9f7c69888a523c432042c192b2d8f637960385bfa0ef1e251791efb76196a5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEOV41900587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b6827087081a8d08a88775cbb4053f46b01be5bfd17b3249752e74089841cd. 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/DEOV41900614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a58b6e33dad0de3995c32ccb02e050c97039b172048832073148fbc68a330c4. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DEOV41900314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7da208cad8a693d2e657f6ed7771493006a522a170918df658a679b326f840c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEOV42101270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a58b6e33dad0de3995c32ccb02e050c97039b172048832073148fbc68a330c4. 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/DEOV41900314.
Schneeweiss 12: Presented by Oliver Koletzki
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aceb5242e1b387b4c08795721445a60abe5ba2f9650574aa70734b491c1e6a1. 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/DEXO62084259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333409b9132f3fd7974f9e2a74564a11780bd3affa3722b7831fcab6f88475d3. 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/DEXO62084260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9bade55c751d3a157c678ceaa6deb0b626958c319b55a54144986dc05631ca. 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/DEXO62084261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a7095cb449ba32540c5a5f568f645e391cfe9bfbfb0d65f394ea2fe6a69e7a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEXO62084262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd6853ca5a65ec58ab54de1046224572cf3d5dd227f702101786a96310c82b4. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEXO62084263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf326310b85443cb7131f083cb007453ba4f7c8b1a364a5a5dba18195802edcbc. 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/DEXO62084222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c66161ef81b2235345b7861c51fe06da372091c1bb61cfaa89163455e7e958. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEWN71700230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4945c455807cb587e0c3e9cbf516ae4c98fcfa0aad1651a9b378c389d72cd2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEXO62084264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb52ea39407da1124e85801c9e67e442f4faab34e005f311fc818ebb60a5bdb. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEXO62084265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90a3ed2508bff529cb67243d286756d640462a8d84ca7addedca871d5175fea. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEXO62084266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd515ded804aac7a3102ea59ce912db0a7e24f2fb8c5d516affcc6033d803afe4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEXO12053967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa322cf10739c81f5d5d708db3a642655725b70cad7236eafb08886f393112716. 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/DENC31800323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475d535f0ffdb4ac90896b9fb6db79cbbf79d58d8c48917ea852ec8e0671db78. 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/DEXO61966874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0b81816f0800cd8780f721eb128995ce830be0b0466bae16f0e3c25480ef43. 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/DEXO62084267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6721d8a42f907ad6f139241ef075e92a75ee5743b1ae1d44549af85bf1b4a39c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEOV42100325.