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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf05d4375f2c27371dc3789624e5974f7ddf90f19e6232a0370cd151525b6bed. 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/cabfeabe-2944-4b94-85d4-96ef8b4d885b.json and https://artists.proofprofile.net/proofs/artist/cabfeabe-2944-4b94-85d4-96ef8b4d885b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b2bfa09b8b2eb5d5d7ab7cd76efc76c86b5d439c24c929cf4246440fb66d59. 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/DEPI82222658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac483c083997c33bc8f3f2ed19374ae04efb4620913e749db060ed82d4ff4afe. 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/DEPI82302100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12032b64c80f4db915911f6fb440fab1a3a3347ff40e14a35c9ecccdf96a90c3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEPI82325603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe759516f8925e4d1a20ad90b34fa46ba32b62f2da05bb99f60dbd5df70da33fd. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:15:23Z), 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/DEPI82415150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7ca187b3167170ce0aaee491b555596e3e94d73222174d1f6f8758b034eb5c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEPI82442028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c9e3f23610a9516e3f7688e181cd07e46ae4a58435ec1069f8719762c6b733. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:43:27Z), 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/DEPI82456964.
Acetone Presents Recordbox III by Sandro Puddu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7ca187b3167170ce0aaee491b555596e3e94d73222174d1f6f8758b034eb5c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/DEPI82442028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe759516f8925e4d1a20ad90b34fa46ba32b62f2da05bb99f60dbd5df70da33fd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEPI82415150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd422d74ab26719c12ef6b0ea2f71a536f72f6a362ee71d648967629f8912c195. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEPI82407895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71caca1fb7da17f3da834888bb4fc258e06411820253f5c4d769acd1b9ebea8. 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/DEPI82503076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f327c556b5572730d82b172d0de747a8adc10d7ae64afa46fc8f313ffaa020. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:16:54Z), 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/DEPI82505826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35a671c09894251f2ce1b84de31f8c7bba391b05da647e1218ab84dfa7cb1b9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ5FN2101047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc59ee037118583f555fafcd10d5597f8344fd37dde5fa10339f454866056119. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:38:32Z), 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/DEPI82455451.
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