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 0x9ee257711da766ce02938b1525b99838a54f7579147fcabf78c449016ec8b06e. 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/42db0c04-06d6-44d5-ab8c-36c0f0e4cfd4.json and https://artists.proofprofile.net/proofs/artist/42db0c04-06d6-44d5-ab8c-36c0f0e4cfd4.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 0xeafbe455e524fe926b200703c399fbe06614a08e538647a6234300347c5dbdbc. 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/UKXN22314015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d768675bc22e678a45500ba14d1eb697dd9802db210f75d08576027494f4b9. 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/UKXN22314016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bcbf70b7c1f4545765d8668e32b269a5479d5f8e9068a68a20203463d8bb37. 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/UKXN22314017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f6752e746fae25d56a090decb34525f7a34a8d99b688239e48d0da4db5e06c. 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/UKXN22314018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217031e6ae883f2351e603193e15e2c87c55452ed8dc6752cac478c402c9c086. 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/UKXN22314019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d84b5a2769f39497935fadc04888f5ee118397955e9e7f5011d05cd2924366. 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/UKXN22314021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeaa03947eae538435bedac70138a66a170333f4efbf3748b04a3d19025426c. 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/UKXN22314020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3642852b98ad8059f9c3cc199f36b6ce96e0fb7e52f84864d9929f55fdacdc. 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/UKXN22314022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8288843c507e56916e3bf95fbc6488167aba042a62a431b08af19286568f6ea1. 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/UKXN22314023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc095e80ec3a75a9090968839ba761255707e24219e65dceb5672167b30724de5. 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/GXF9Q2595737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a39a8670a1a73b9a1ca8506973d479edca8a089a886932bccf739270c931bbc. 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/GXF9Q2528395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550f3e0eda1b0dc6b30503f04eb2d227fe6d123301fb4bc425e704321115c2aa. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBMA22482629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2173485e4d32a1b9be8f339cddd97863380b9ff7093811307828ce93c8c02113. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBMA22482630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827556c45459a94fdf611d7379c2254dffd3f48ff4adca51d18e4dd484bd9bb4. 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/GBMA22482631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289003a07f909ad8f1e6cec4ee029fa91f0cc0317cd45e6cecfa406d3b2f7170. 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/GBMA22482632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2547803be8fd170e8d868a8661f347259baa3abf5a58af82e9243a3cced010b3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBMA22426593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01a7d82ec2b47946827bebf3f0a5875509a5ac8fe9520b8ff0597b9fab2b1ce. 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/GBMA22317625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25c5e454ce8bde3cb91845cd3fcb4893a1e493ff5c9e0cc61fe0c4cdb21d922. 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/GBLFP2397354.