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 0xace72123d928507485b22d88c9ebce8483dfb393905e97f1009e4ee5ede82c3b. 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/75f0bfbd-be9d-4be0-9dff-6fe84f71a6f2.json and https://artists.proofprofile.net/proofs/artist/75f0bfbd-be9d-4be0-9dff-6fe84f71a6f2.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 0x3db46120a8807296cd80f0c74fc06e157713c2f5c428e01cb990de1f3ed2d7ba. 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/FR2X41830031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c8241e09dd7e3a97f7bd633403a6ed6254796da4796b3f8bcc0ed0afe31e1d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR2X41830033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a54ecae3b9b1228cdb2b8ed643e375ea871f7a2382452edaca51c1eec88afa3. 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/FR2X41830034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046236de3d9657160fbbde32cbcc4677b088f6d62167a6838a9d9f1c9564d9d5. 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/FR2X41830038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8d5b48a5f0941dc8c70c89cb6097360b28cf50c434ebcac4b459ea6a99ae1c. 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/FR2X41830032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e43bef5fff9c4619c35670998696aa6b29c980d20f866227ab182f3c916f4b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:34Z), 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/FRX201847847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309706c0136a7abbd4a7f155f32f00226639b461dd6b5372b23c6ab20f1edfc8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX201917686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44b2f3479f3b98192878f43e479132b58e4dd1232d19cc3808f70c7119c812b. 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/FRX282080078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edcca32648848c753e950ae2bad81e0844c4b15c8237099b9cd116e1d42a3da. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRX282080080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cf3a670edc03767f9a748c13bd77d609ac48bb5358b6ba7900f04e15498beb. 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/DGA0T2414989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e3dc2b9ff8369b46f745792954b6150a4ffd7281da1a756695303526553e64. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/RUA1D2551761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ded9dd0523d68e9d4006020976df31e6dc806d1f212525b40fdc6ce06a2167. 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/RUAGT2540066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b9d1c418168f66ad149a4d5c5983f95d5585a8474d609466e0606dce4bb539. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/RUA1D2264670.