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 0x83751b8aab9049220f311cd7efb41b2c2cccb2182fed50fa2c324369cd905824. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd2f019f-89a7-4cd5-9e25-aa141253057e.json and https://artists.proofprofile.net/proofs/artist/cd2f019f-89a7-4cd5-9e25-aa141253057e.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 0x5b78f99785f466598de87cdb6be693ea334ba93cb95a8fb0eebea223cac8825d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLM160100193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9804dff8b8d3e212bd7ecdec5aeabccca34c513d7824e66487dbfbd3996873. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NLM160100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffe893f391b02457e9ee9585ba339939c9524057d3efd14d77f41b7346f1758. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NLM160100223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da0b897029cf4a49e03045c727436d3100a07f8d4cd2795399fdfeb69778342. 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/NLM160100233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868e557df5d2d77595695225762c218cf143a1487e4f93e8d96c19288886d30e. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/NLM160100243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9a819c0a9872cb6dac47fc5118d6a8d5009200cd4a3c4e4ff133c7dc106e49. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLM160100253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1662d534ab2307760b21f3f998d1a00071a4a922e023ad57372406a1c6d9d6bc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLM160100263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e73e9819bc136c74116348e9c13af84d2fa0d35489ede050688b463eebc9dcc. 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/NLM160100273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e8379afda53b5eb176f2f4f3235be0bd0eee99b392d8602107442c4c301874. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLM160100283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc84447e7740e51fc5869b1235cddaffa7bb6f42e8b7f78ba172546bf03440fb. 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/NLM160100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ed2e934dfbeee5e37fa611cb455e977a59c04d90f42d31f194819953e2e5cc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLM160100205.