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 0x508cf0df7666d9492ae79d7a744d9927bd1a35ac590f6023031f89a19574c3bd. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a85c0d6-a433-4b5b-a178-a4e1315f56ab.json and https://artists.proofprofile.net/proofs/artist/7a85c0d6-a433-4b5b-a178-a4e1315f56ab.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 0x5b98e0caa942db5b490fed4c5b9ccc758822c4dfda327573d54f68eba24095fb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA81921458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097aaeced385e596a3aad9f69a3f9a99b660c9ec91d0d6df2c5072865003dbc9. 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/QZDA81921459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12be1bd56cd29f72f5f625dbd296e9d4439c50d7392515970aec0c4d76c61c37. 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/QZDA81921464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae6ba543a9a9b55e3d63e997f42e8052a869b3574b33d219a8fd7567124b949. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA81921466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab131fd6d39144a1940e92753154b28387a84a1e948ff5b87cf6e27d20f6b9c. 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/QZDA81921467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeddd11edff0d0a2925819c7e15f8ccbe1505466b99b1dde626991ae0aea747a. 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/QZDA81921468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a8296f20ba9d134b9812460b6a2d42a281cf52b00eb723633d4c7803254aaa. 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/QZDA81921460.
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 0xd887fc6ce5c8caee813102f48d56346b0ae633eadde4064e80f29acdc55deb04. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZDA81921461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436617ab5d17477db29b4366a4b13500e70b26f3cb1a9d0526dd22fffa7221c0. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZDA81921462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e32a1b6e9f19f9f6a9d7d3385351fb588d7e5e575e914c55e8f20e51c6a1a1. 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/QZDA81921463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf343f41f0b9041861a4f2103f67749117f86f6e563de907d1af645a6baaa4e04. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZDA81921465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884ad470069a68ae1ff279bc1cb838004e567ff7b8bb1293b28344e92ec14ff5. 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/QZ4JJ1944274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8027328da345e8b2e5b9a29ba2f96b6ed01eb63200e545097aeb036e7c0db0e1. 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/QZ4JJ1944275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616681b71b46aa05aa0f3780b436fdb3b176c1d65f746192b3dfc2a32ad358e1. 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/QZ4JJ1944276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e9d2046093beebd6c57e0ad9e22fe8b70433463df7eaf157dcb82921e41b37. 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/QZDA71965665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e916f69eb39ab02a9fff5e144dd4841abaefcd156098f279e4aad972686464. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZDA71965666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ae2072fe7b8571f768e2574438563e0c9e83bcad01b3f897d470b767775938. 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/QZDA71965670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47265d3c242ce73e02455eebe48ad54716b1721ac81d3964d66d1d9c0df41b8. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZDA71965667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d624e82eb15e82f5a9fbdebd59e6ceb3fa410d17316885e2c14791d0e9d2da. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZDA71965669.