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 0xb4a7e564f3743e9bc67db4e43a32c394a5c7ff7d5cb80c75040890ea8fe79eb8. 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/d31ba33d-f480-4659-8481-01f845e75fc6.json and https://artists.proofprofile.net/proofs/artist/d31ba33d-f480-4659-8481-01f845e75fc6.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 0x98cdf692993116db33af9163d0dfa171d7e28d3f266bcd5695d916c91187b902. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/UKU932460359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971ea11fbf3a2c327c335ef7ecc17c90aa17982abcc5e91b989bf728b69c371a. 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/GBKQU2041860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b18df5c3e3e88dcf473af98fae6013fab930dd29519504a0c009a5935d9c828. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKQU2041861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924b0e12ff8e631264758f460d9f2322f70d8832ce22634c7a7cfbaa51245218. 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/GBKQU2041862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63df015d89e8ec5982a35dc82ff5ce2b7ebc83790e4ca63c35eb418ec7f6a7f5. 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/UKU932112320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49700823eabe7b7b6f0258df060452767589fb723ce0ffcd2a7581fcde5fd1af. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/UKU932460391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5c207e9e2ad54830ec63d00e934bdc72b3694b238340a9799231c50ba3565a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/UKU932460394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa7292a64a5a0169f4a11366ee6701563275eb096a8a9138aa2598f3cb6a9b5. 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/UKU932460443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812372143cfe40123abecdaedb98f60826d9ef8f0021bf9fb7592db79277e07f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MX2832339233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db91a721019dbaf243c83333cf03aeabc019df496611b9feae63cb9fdeb4243. 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/UKU932460812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f339b08b6368fcf24ca60232f99ced889158876419b28e471cb87e0023d0f0. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/BK4DA2508748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e9443ba6efb304d56bc245775bf6e2e19321a6f95dd5439c767c594494841a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BK4DA2508751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bc132268ddcbdef296ebcbf75893324a96302846c72e2ebcd819fab40432b5. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/BK4DA2508753.
Wachita China Personal Bootlegs Collection Vol.3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3179ff392239cb6d05cc601bf2ee4b54357b89cda92b0cfdd2fba5d1bbc66c2. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/GB8KE1954355.