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 0xc69bd4aec57913abc19e9098a98c409289fae8615a5c51792d90619646168db6. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df35aa30-b953-4781-ab69-a003c81b10ef.json and https://artists.proofprofile.net/proofs/artist/df35aa30-b953-4781-ab69-a003c81b10ef.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 0x7df41ffb8a83284cefb3b3e28ffc4eced46d2407594560a4b0cd66469e6ceb93. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:32:34Z), 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/QZNJW2488442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3665af2f2a21de85edec9abc024d8eda3b84788d9ceea2975e69dc2d1b1fe27c. 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/QZNJX2411180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431924ef9b830b09a201f215f7802af7e79a20c1edc88ca2d4c44eb3f2141151. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:08:53Z), 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/QZNJX2442943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4fe3dc652cde41cf3599138e5b4e2a169ece2b6cc40d7cd10bf9bbd82fa79d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJX2447780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb30bc0858252f1f6257f7065f6e8627e1544982a714b89f719c3654c7dfeb56. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNJX2447781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3623afd32702a5fd5b61d9696e02eef8509932aff7569b9471e044f032d06f57. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZNJX2447782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae741b2f6bddd58e5be9d2e7068c842a84ceaab02e6b03519dc08d25a69e576. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZNJX2447783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ca7a7b38d22779d75f9a53e5d85b06026fedc83acf3afad16d455bf46a6ed7. 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/QZNJX2447784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968d6cb515a8a444fc3f23546a667d8cfbee70e2420b5552f9895059b2671775. 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/QZNJX2447785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48c66164476abd45fd03a77e6cdc6f9b9b2717171bb20105004df43867a6aaa. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:41:27Z), 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/QZNJX2447786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f51297cfb53d6ad06146d157b653284099e6fc2f2137172ea4ea6a95a3a61d0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNJX2447787.