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 0xb9751ce5b238756d172f2597ac87f3eb43458fb3045773fd0cbe63084ec7e577. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/074420c8-c230-431f-90a1-6a9aeca1df08.json and https://artists.proofprofile.net/proofs/artist/074420c8-c230-431f-90a1-6a9aeca1df08.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 0x3a8372eb05f878468c09d01d0ceed04889bec256cb3c4afc3f7d625c495623c1. 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/QZNWX2172268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83575c09d6ff443bb7358d0b0acfd92748fa70747bcc729eeabfbe89e0f99d9. 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/QZNWX2172271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afd1d75b5c1dae369ef194770b06921e7b61157f659a2beb53061751f0d94db. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES62150041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86871ae8da7bfc42aac43decd69c8fed9f4090764d2244b17935a5d87348c0ef. 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/QZNWX2172272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cd464129b36bda44806989a17b73a1cc9992dc530428f42258ce58ef670727. 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/QZNWX2172273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db083080dae10d9bec976cf3157af14126d735788d7d1390743854f896aba8e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNWX2172269.
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 0x3ef1843a044d627c08ff8effd35849fe7d9b2ad43f222eaff84bd7a26330d7e4. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZNWY2075427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e051ca938f759a9689b6fc4d63db7bea524e87eb42659c763e84135e2232119. 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/QZNWX2172274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc86d02d8a91b58a20f86bc2b2220900bb01f6e5a90847fe402c4917f5676eb8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA51993048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5872bdac6fe39e239db1198053f6c90ae8fe61e4e9e224d9d02484b430abf41d. 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/QZDA51993050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cba8242810cf454002bf45770fd2a7bd60c964f724178beeca394ebba6d5fd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA51993051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffeb3d5c592cb746eeddb781b05a6f173f6410b216491097da0481c2c1f5a67. 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/QZDA51993054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e214dff3102ee4b74f4663dfd2013f92d4115022fb252bf8c365d39d6c78e24. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA51993060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf326737b393acf25676dc33001f61205678e35fd6fbf490cc96659e72cfa4593. 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/QZDA51993061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a6b9e30c08aec84039f6f525e809e82c9ca7187a83b7c72526c6cac03aeb1d. 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/QZDA51993065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4a531550eda62b56eaefdb53b67caaec0696b9883480df98566799cfb4ec31. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZDA51993047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a70d7a5271372f1b204508f247185bc91b05e7e2906754df727770b3f757166. 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/QZDA51993049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb963b7172bf18442072986e9184e10fde8560c161f80e81a864d7de1b2403ba6. 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/QZDA51993064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e2e8ed521b79ca8b42898dc43bf1772df5414085c69c5e4fec96ad7bcd24a3. 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/USDY41697643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b17ad1ea561ef7bf75da613c667ae7cf6cb73149ae74a953907679fb798468. 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/MXF601100167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a13165f712991cb83d24b88a5e8c89f9f9159262bf30653ee45b49af9c3e3bc. 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/QZHN52536169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad154f95b98303eaf1798f6885a513e78fb4cdb61f75e1ce1e21e62bdbd442ca. 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/QZHN52536172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cfabaab96720c8d2819178007637dda49e26f25330c9e31992e0587e9dfe6a. 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/QZHN52536175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b0bae63896ced73303f9ed4a3b849c08a53dfaae421ce40421b24a3af7fb01. 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/QZHN52536178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2d0dabd4142e4103241edf595244fe569a03f5829fc1609d52709ab092e92b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZHN52536170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65624f41b49c386c2215ea89c0cf2bc7c7f86bfdf03d1a7e27283fe2e4950e2. 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/QZHN52536171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084cad4f0a077ba73163806f0b72f63ed14d82c5e99501aa92d56673ea5def68. 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/QZHN52536173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2cf188da0d990893b8256d78fa13784e358d3d0c125db8160ac6131988cb46. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZHN52536174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4622d5c81eae51e179bb8422d38e1bbc78a2addf46a0d89508682873ec8f054. 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/QZHN52536179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0788a5d74db4f7435005b74b49c9db8fe660bb05ac0df01b1eae9428f024b5a8. 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/QZHN52536182.