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 0xe121d849147986bf23365b13cec0d2c36f67521b3a57ee622b9598eb09977016. 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/8faf2903-17a7-4843-9930-8806de65ac1f.json and https://artists.proofprofile.net/proofs/artist/8faf2903-17a7-4843-9930-8806de65ac1f.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 0xa89b9aea4039fcea1a87ef20620d1ee1737b940cb6f1391307cc1493097a62de. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SGB502524858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8f2c9c5adb0f1194a0c73754a8b86b1586af1439e9f9ad2511475c80ab1d98. 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/GBLV62411548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135d2eb53f7f3459045a9ec3378bd0ba56a4c20568511d689bd65ed196132c6f. 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/CA5KR2459624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2292a636a11a98daa14ce163bfd30e90b997d3f6f299b89c955bf3a4520a84b. 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/NL1LE2202814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaca8e1db1c828d7c0bb26fac7fb089395ae798c1526d0c3f1d3588cfe88274. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/NL1LE2202815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e356924d1014321fe2b66023d8e5602795ae4c08fb24383ee478b17542674a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL1LE2202816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442981e6f542229f2c8dd76201541827097c9b0c953df4bffd69075e9b8a498e. 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/NL1LE2202817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed1e70ec3c8cc724d6c7b09b26a1afb18a86163eefbc25c9a2df707b988d11f. 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/NL1LE2202818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b88160e75cece239b6ef15b20dfceac0fdc9ecc60a4b959819a917cf88e021. 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/NL1LE2202819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135f4c60b40bdc34c9afa489f19fec216dd052e3d656aaf79723256db8a7affc. 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/NL1LE2202820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb20280c6f32fd70b8f2ed38e9f466b9c7ca623bf60f3d0106a15b94f0d8bcb8. 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/NL1LE2202821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc512c488214c2b186808f303042f2bc8571ed0b69d33ade9ea984d3d4a3012. 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/NL1LE2202822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14755a692c472ad8960968d2e37978a51a241f0d2dec84b0824304dfe7fbb6a5. 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/NL1LE2202823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb006f8fcc544f0f0f628ee11bc950e9e2c26575cfc8721f21a1b249d26512bf. 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/GX53U2008652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8876cccfcd5401f2c31c98fd095d9e44a8f0fc47d5c9cff03221befeddece788. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GX3Q92190878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb84ae06ef4a744673e24659e7bf783237a1bada601aad4694fe86757c8ed187. 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/QM24S2003408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf110a4619eea2443b6e3ff846840c4e5285ae99042aca49d4abe039ba6217eb5. 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/GX53U2008654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec3191ede4d8431643aba9e22a13934e619517720de6f4ab61f96b8cbe28e00. 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/GX53U2008653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439eacc6b8710916f9eb29a4a058eecdde606c03dbdda1c09046bc44630f109f. 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/GX53U2008655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a79207e446423d41489bb0b8a9453b69914f1a898cf7882c4ec5bb3ddf324fd. 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/CA5KR2081438.
Nothing But... Deep & Minimal Essentials, Vol. 20