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 0xb37d82d297452422d599b33a009a984c7958d70547096aa7cbad856d4e6859a4. 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/16c973f4-4ffc-44f1-bf2c-ebaf84f77b06.json and https://artists.proofprofile.net/proofs/artist/16c973f4-4ffc-44f1-bf2c-ebaf84f77b06.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Heartbreak Houston (Summer's Over Edition)
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 0xce2eda58daff2cf86ca7da9336eaa078de011813443c41c8630081a879850707. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZHN92451285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1b49c86726a9f3c36858f37a489b235ccf23475de5c82041c7c9f98667251f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHN92451286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60da81257f6c8535a48c8c4156ef1e47ff606625ec29b3778704174c6891c22a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZHN92451287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8e0064b6b613c0d0c663bfca9c32f3d4ae8822b0b9888fb78fbad0e01426f4. 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/QZTB32378316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1bcc1e6f65364162f4501c8cdde79e6a025d9750931823f018f2e7f372cb13. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZHN92451288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6095ba981858bab5680c0bac1963533791e84d61550fbb6eda8cf6b2b64cdda. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZHN92451291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab10513a82736f37772e74ee3d7b147d1a369ebcec47f67a0a36cdb0464b55e. 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/QZHN92451283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086e7616174b03d99d410895fbeeb633a062c498d689c9d86018d822e707de4a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA52517467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a4fe826ae78ef02ba4923cba2ed633458362b0ef10d02de507475551a638e1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ782417311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ca2c5aa6029e8f2d77d1fc7fa0d290b0c921a9f23a932de54d597324c462ef. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZDA52517474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc430dc7e7679f6abc088898a8b72a76150ad5168c2002dd3e80497d44b7f880. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZHN92451284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c554e3c23384cd3430b6cc6331cf36daae3df51939ce5ffed417863a438065. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZMER2568595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda176e9c74a436384aa877e3d8f7032aeac4259fd0b9e80665bee0b6c75c43ba. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTAZ2580475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15091f10f1ead99932268f765077f8f560e2b10e767f2024e433300858ae709. 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/QZHN82354010.