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 0x3da46418a72991ab70a769e910e54af6cef581b3356bd1ae724150aa54c071c0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34eb52f2-c4d7-45b0-8bc5-9b631980fe39.json and https://artists.proofprofile.net/proofs/artist/34eb52f2-c4d7-45b0-8bc5-9b631980fe39.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 0x2b94ae5605a1f7c97bae39bbbab9ccfb65362217bf7960c66a9325fa16fdc93c. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:54Z), 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/DGA072281777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7148cc221fa47c2ce14fa7d4f574c67e6b6be291c12dda57ef5b60bc88543633. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM6N22382261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c1311232cfdab3e439bb9c820c50770b53914032c72c97d318645b8f18cc8c. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:29:11Z), 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/QM6N22337690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc214e641a675c219604b75d15daacb4aab6d8f746868fe7a8b41e1772cf15e6f. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/FRX452380623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c5c50e165c025e743872089d703453cc32409147511e1f9c4a6cc2a6bb8b90. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QMBZ92355187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3359441f1a54a044458692166a6f4f675c119f7f7aeeaa36f77a2aad9f945003. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMDA62337720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506aa0db04552a557cd41112b9d2b5d25f4f58dc470abb3ca75f5c4775d0e29d. 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/US7VG2529148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6f2eb6b88ba7136cb78da9ce9af03ac08a266335ae5f96dc00b804fd8f4bb6. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZGLS2534922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e4686c8293b4ac93a2b3b960a1596ade2ab597a7ea8b7ecac6a840077a0e0b. 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/DGA052595537.