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 0xcad3192f34c10405dfb55d5bc3092a3cdb96309ffba4671d2c404aca70bb6b4c. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfc56ab3-e8e2-4a28-b986-4e51fb709d9d.json and https://artists.proofprofile.net/proofs/artist/cfc56ab3-e8e2-4a28-b986-4e51fb709d9d.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 0x0042f395d051195a6f0dbba652dbad6465aa5905756de73b5c0f6706cea1298b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZK6P2003501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3361f54278eae5b6430140fd15d0b1df8b4255533b0c1dc8344d70558dcf43e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZNWW2098845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c836ffe7d86722519f32569c95be99ad57c9a35d184ef06cf4bf3749d129e2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6Q2261744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0c77f96bb22d6dcbc68ce6ab9df93127d08b37d6feb3537362f65fd1e0c9ec. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:42:33Z), 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/QZPLS2358719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec81a3916db6ba1ca1c66ae8ea91b7bb155b4ceeb60e8fcf0c52fbde3bb1946. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTBD2474124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec81a3916db6ba1ca1c66ae8ea91b7bb155b4ceeb60e8fcf0c52fbde3bb1946. 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/QZTBD2474124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6568c824a10d499244f160fa06b6cf2ef1e696e889c9390f704e8641fe3ea879. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZZ782443821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6568c824a10d499244f160fa06b6cf2ef1e696e889c9390f704e8641fe3ea879. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZZ782443821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce52f29069814d23eb5a494182b1fa85971c73dbc0bbef027029ebc3243b8d35. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7T2415731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12c76e8602f3b867915b79cc4c0d546afe7a3a2468aca6d6216d609b1c49d53. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7T2415732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec81a3916db6ba1ca1c66ae8ea91b7bb155b4ceeb60e8fcf0c52fbde3bb1946. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZTBD2474124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fb1f9d4e9c4f26e44bf73392a1cba4a1f9fea6c182a654ccc9a2aba37149e8. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:47:14Z), 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/QZZ7T2415733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5437f8ae595f8635960d6a2cc8eb9f4ffd4e947ccde00dbc7de289750ce125fa. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZZ7T2415734.