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 0x690b35c927b023d96fdd1616b9461486cf68e0751964dfb07cc5054b86c042bd. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3ec195d-d131-4c58-978f-41ee7ddbcfb5.json and https://artists.proofprofile.net/proofs/artist/f3ec195d-d131-4c58-978f-41ee7ddbcfb5.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 0xc29f53448f7baec33a304fb3b42159adb472a081ee0fd99804c113fc7e390766. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:42:06Z), 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/QZNWX2036665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c7f13cf0b0841e0d698332ef242ec5a30d86f675dbf043d025ff0f3c7db63b. 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/QZNWU2191845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6c883ea30bdc69fd101b339e0ef18df0e0b6de8fb9fa61476a9b7070fbc73a. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZNWU2191846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f58d7d4658d637ec84a633153a6b7ac1dce29be52a47167145004de011d8722. 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/QZNWS2146565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe6ff9239b0a9e3857d7b07d145488ff9ef7c33691d4dde10018779e0c05032. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZHNC2187518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386ff7872c114f0486841b254ebe1465a97b597a826f09bf5f0b60aa34857bca. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZNWU2191847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25cf9e56a1c014e92f9c98c264a40f5ea7e7ceda549c8c59eec705f2d579a32. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNWU2191848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b000d46bd9b31064151079a7e1a0f73fbc208007f8985fbd521d1a1e03a769. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:27:35Z), 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/QZNWR2159407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2371bff81d16508d908fd16512da0bcdfc67934a419713a9f511569458b5d3e0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWU2191849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bb8158e58a322fb414169901a5ee413a08964d1eea948a80a343f5847c4863. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:50:40Z), 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/QZTB42381901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ce3e2de5dba883af6f8f0bf24988c0cd6733bc07b19eede11ffbbef04728cd. 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/QZK6Q2439892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459691a14de5ac6f045e4dd14f60f5f93fb4fe516553e6dedd342755ebe887f9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWW2475602.