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 0x6206cbd14d95ddf9049c502ddbf0c0dd201430d819d5c19c79c5a17bf0f8e2cb. 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/f3795be9-fc4d-47a7-b53a-ae772f86589a.json and https://artists.proofprofile.net/proofs/artist/f3795be9-fc4d-47a7-b53a-ae772f86589a.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 0x812f8231d40692cac54a4e4eb953de3ab5dd730acdabdd5251111fd0e0e334c2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEEC31810500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430f0468db3acbd63d28bb583b4e001f133872e8ef0171b781d74bc64a35a377. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUS12300338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5aa65f2a33767dd0316d62f56b3734d6297d045c8ed862ca3f74aa68713a9d2. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DEY472473712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fd9945b362ac9d3565a44104191a7e157a1b28eb1f1daa8583ac6681260c51. 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/GBJX32005166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba0ded72f1729f918ec50b66b0d7eb1ee413c4780027b33407d77340c34a9df. 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/GBJX32005167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27987df18fe67ff7efa1f44dd1de9b9d890a1e28897c381e60a0d26ac9f8ddf. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBJX32005168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2ee2c0956707856dde83f8801000bb7ec2ddc515a0b7b7fdeaa5b3c95c7b25. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUS12400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea404782ab0f3673ccd4e8cc925a83b11d4f9366084a8f6e78c3a722abb51cf. 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/DEY472470204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d152f6db5d412e9ae9c0920c2b7d2688b40e376f168b663a7a73c235a465d98. 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/DEY472470205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b3ce318d4502c2a8a0262d180b977ca30ba7bf8fa03e70b28761289bdd67ce. 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/DEY472470207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347adf9af3fc84f84baa317b352e58a67f4273f01cf68a30204de2dc65d274e3. 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/GBKQU2362956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3e32d9e271328c6928996ced17e30163a2cd9e66908a0ecb59caf2deb741c2. 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/USA2P2127744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc623a8b6be91d4e248b14d05ffd75a52e2ddec1ee41fd1c965f0baa087a8383c. 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/DEEC33500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb768df8a89459ed70d36eaea1044a07eceb15bbc3d35db265136d194abee8d. 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/DEEC33500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bb9de8aaf1ac7dca96cc19902e7acce7475282eabaccbbad296d0e6499b4c0. 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/IL4612000430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822d70373a8164b738700ca2ade843761b1694b61b51fc78ea68da4b0b6d2827. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/UKACT2030004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234e1a00fbe0173eef981fd8af7eb0d265c308df82d3c519b631bc65d445b13c. 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/UKACT2030005.
Blower's Daughter - Radeckt Interpretation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be846fd46871e05155ab0a806ae5c2305ae605a80f1ff6df61e1c8b7f219d6a. 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/GBKQU2441833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cbeee8276f38ef73755b8daa9688603b153a71cd220630453df24a65435b6f. 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/DEEC33500511.