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 0xf5c8138bd444a093026af87838f866007fbababe2c14588dc6387b46f670cebd. 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/d4e3e54f-7e98-4673-a138-64320e081b2f.json and https://artists.proofprofile.net/proofs/artist/d4e3e54f-7e98-4673-a138-64320e081b2f.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 0xc155a23376ce8d23281323b81c2a5a5d3867913a43e698eded3aa9d85b4bd2d7. 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/QZHNA2148209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888c1c79e5c165bd5b71b1a7bc42f5f4ccad82805e8d24fe984862f9ec19de48. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:08:08Z), 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/QZNWQ2103724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914ee48d281b839e71746f3f938c4264086b40ac09072d26932a9df2ad67d672. 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/QZNWS2131306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99159aa4d692291b57cb2b3b109a538a1887f1df8dc24726d0844a88d31166f. 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/QZNWS2131309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8b1c36ccd01543d86ce822582786327bcbb5985fbb45a7c147fab0cdb0bf11. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZNWS2131310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e04886b0049aee9e991bd34bca118f8dacce9cf453e7225c51327f2b21cc44. 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/QZNWS2131311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506281a2244eb8807e46143713a02b6effee8ad37f9c724ffb3cde71e5904889. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNWS2131313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456ecc2729600a7da5c678e39ac543fa9d990c6f1b23ecead8002ffb12808305. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWS2131314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7ac86a7e9c7500b3883cfcf34fd028c38b596a26751b54fff0a96a589a1ce8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWS2131315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e53c7cee718e2b49fa6c62f0fb0d861d5c723a8f85717f864821829c81769af. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:42:38Z), 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/QZNWS2131316.