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 0x23982e4aa1918e721033a0855a5eaa3ab6d529fa7dadae301699d78ef7cc00a7. 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/acc753b0-8ef7-4900-a86d-c99112873bf2.json and https://artists.proofprofile.net/proofs/artist/acc753b0-8ef7-4900-a86d-c99112873bf2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Paint Me in Gold [Live at BBC Introducing] (Acoustic)
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 0x075d4ab619ce046265f5a43d9dd400d7ab28732b691b578b430b07dd851bc029. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHNB1908134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac5b86fbe25d0839aee42602a8a30b9c7eb8da709c59111b9b88c3ab1b9265d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZHZ52060397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5517e577d3f074de835778598327d60f3cdf1771513e1cc883cdab0061411b17. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBRKQ2131956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5c8eeb312de6589f8ca0500d42f84e943103eaf382c5aa783d7dd99cf1f84d. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZNJX2097495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fec46cce4d9515508c6094d675d9b5e089ad10e538964d97d9bc268d7f90b5. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GBRKQ2183700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb6da5c3f42a71d3630a20a308f808e03e8898c0eacc69545eb9fdeb497ff16. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/UKW3Z2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8663526bb158439a50875414f0ab3093a265d93d88ed6efc0d6faa65ec2ccee. 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/UKW3Z2400364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cea2edf60fd9ec17c08763d91e2c42da81406905e688721928feb994f15424. 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/UKW3Z2400993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f23260cdc6a20aa3dd5cf539d4f629319228e2c45b57e31e093bf9c727e0962. 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/UKW3Z2402100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac80184fb99ed856041e06620228d56446d6c2cb84b53eeaf60a5493e7f2314. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/UKW3Z2402106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7fe54ae15907ed4d7c355f6f49791bea303f41e6ab2ec39d3fb8e3efdc1749. 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/UKW3Z2500380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7fe54ae15907ed4d7c355f6f49791bea303f41e6ab2ec39d3fb8e3efdc1749. 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/UKW3Z2500380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297be19d4ae85d7ab4ecd914f9ba4bd05dd15f5282ee91c6447d5f49dfdfaff4. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/UKW3Z2301160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8470e4a540f199278afb07835ef91ea54b0a15ff0f72353b747fc17c438bf50b. 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/UK9AV2302231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0befd1c3a3afed19ab43390f1ce53ea725fd97df9074244ae5d05b6f4b3e66. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QMDA62464564.