frame|right|Artist's conception of a white dwarf, right, accreting hydrogen from the Roche lobe of its larger companion star A nova is a transient astronomical event that causes the sudden appearance
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 0xe0e1f3680519f5442f83b1ed06aa066e6aa77b4289e54308f603bc1fa27f6057. 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/61e19f19-ce10-4bbd-8e5a-a18fa91d4ad1.json and https://artists.proofprofile.net/proofs/artist/61e19f19-ce10-4bbd-8e5a-a18fa91d4ad1.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 0xeca8aaf48cbdf74edd2bf4eea845205916881dabd1499ec32c6294d6fcc55b82. 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/TCAGH2223494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46acbcd6f7bf738de489605548244495859812b41df905ef8db977ae62bccf8. 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/TCAIU2475362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1146111c8a80501a5dc9ac4988827af9199acd656d7c838b65cccf37ac5c852. 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/QZHN52560460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c58138cd50c0f490f30705d49b0436836d9f5b6478f6346ad1de1c89457a114. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAHC2304206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024cc84145e1476185790b5934aa82a6a944b8c336ac9d7deb53f546cfbde46a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHN52560461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46acbcd6f7bf738de489605548244495859812b41df905ef8db977ae62bccf8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIU2475362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca8aaf48cbdf74edd2bf4eea845205916881dabd1499ec32c6294d6fcc55b82. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAGH2223494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc947b6dbb6e7a606cae665ce37d4d3d0a0b24288faad817a7c9c2d39a4c42d. 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/QZHN52560462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386af0a50cf64b402b55b3000a04d3f2d0ad8755cb364dd2a4a11cd1f8e13bd8. 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/QZHN52560463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d06bd838f8f987d905379e14c566ad75bbceede5548577c49eb2f5e281ee651. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN52560464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d2fe057c465e1e210f0d2509085bd9871b1cb824c116ef0f513d59b260f5ab. 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/QZHN52560466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf659a080ee58136b33f869a421e1a4e5010a3a4f7d9def617c7030201da94b6e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN52560467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b84a976092e40a6a796580cb1c56fa530b1fad8c49a4ebb632667153e54161. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZHN52560468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e2e816cbdb5aecd7fd7f2575746b70f465d132a805260ffb3c7d9b286c2624. 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/QZHN52560469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b656a15ee485a4536eae22f2612a874fc5c0e0b55dc40268ff8ed359ac69512. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZHN52560471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae5673c16070928c91f30a3606ca84ce3e404435bf6cc616488bdc1bd382653. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN52560472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839371c8e92eebc20dc7ef8610cb888d85e63cf76fcfb62878c1891bdbb33488. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/TCAJG2530776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3db3f150cb98a4585f73f8b6b5bd123b7996aff2133b1318eb5bcc3ae93294a. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZHN52560474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84158821657acc588dee931ba6d91c90f7b3ed78288573ff60758a71d52b9fb. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZHN52560475.