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 0xfc491f0d644b81989f6d29954c5ebfa62683ff6debd505cdc53736ca2d9d2db7. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7436147-6773-4713-b1bf-8723d861c9df.json and https://artists.proofprofile.net/proofs/artist/b7436147-6773-4713-b1bf-8723d861c9df.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 0x9955a91eaae743d45405e28bee490645c7e7290ad2e94cc77028d8131f31f62f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USHM80636983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1beaf3f1d4f5a3506b2c04c697b806920f4ae030f53aae7b9c338f63aca87fd3. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/USHM80636987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01443e05fab7513696a152dbd56622517d66d9968c96ea3d90e5e87cb2763d2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:04:58Z), 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/USHM80636992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9b99e2199a819febbec622a9184eb27ba878e8c3adb88967f72e759d04e436. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USHM80636998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95d09b44cd3484f7e859dd9f98ea78018c0514fe677a22735b3cca29b312131. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:07:51Z), 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/USHM80636999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ebfe592b6440373547a87605812bffd132f34e01ea513a3328609dd4b3ceb7. 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/USHM20449970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6a72a2dffb73ba171d85409990366db0e772f4f0a284a8fac119f2368dd5df. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USHM20449971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb2aeb0cbdd0c2430171442f1ac84598d6ff02c7f3ed56e7b4fcd67642a712a. 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/USCGH2094231.