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 0x4c607523370e486a009757b18c5e819fed305e62554a5f255c19201a5fbc1d2f. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ed68689-efc4-4cc3-bea9-236cc1f7d4c0.json and https://artists.proofprofile.net/proofs/artist/9ed68689-efc4-4cc3-bea9-236cc1f7d4c0.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 0x7b6b175b618b222a6b3d45b85236d086ee946a86e6ce8c0154611013614a80d6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USZXT1202981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8f012d84f462fda6354e0106085066f82b70dca8fefa34fe071042a404f578. 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/USZXT1202982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024dfe8d27fc7fd4a594e90e6d4e79c7f5225aed6b6c98e3ac0f91ca0a8279c8. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:57:21Z), 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/USZXT1202983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5c17f6b5ff7b2d3c39c865b8b88f280e18065461897c54041a15cbb2144b09. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USZXT1202984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24eafd7c43e5b3a281861d74955423206f1f72fd2d86211fa8e91bc7a949ea61. 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/USZXT1202985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c9bee237271c56ffda3480d61d7bbc52ef144d2c86887c38f85291909418fd. 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/USZXT1202989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a92bb2c9af0d2b2f8c10c7aeae91e7beed6c04fddd95daf94479743e63457e2. 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/USZXT1202990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c68a31e933abc31fc53519708375d69d2f9c60c4d13a6966419add4970830e5. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:22:18Z), 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/USZXT1202991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418b8057a8bf8ae61d2555e5fc68ce3b00edd19f718ae5c9ce8f53f1a969bd6a. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/USZXT1202993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13298b7424d4b72f8fcc1ead90b3493922c7038e741a338ac199f52866a3e59. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USZXT1202994.