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 0x452ea8cdf18c64566522855d80f4de7c1dc603d3c9cffa18a3f170470bd5e861. 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/d312c3f6-14ea-42bb-b351-c827b2f424b0.json and https://artists.proofprofile.net/proofs/artist/d312c3f6-14ea-42bb-b351-c827b2f424b0.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 0x56f40acb48cc56b94ba2c92c03377f8718b4c503388fe09c09c33645b645c31b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:02:12Z), 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/FRX201854401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e707bd76971d760f0ad417aaef49fe1341902703c7938878c59fb6674a79520. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:25:00Z), 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/FR2X41976008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecb417eb26b459c9fb49229ab63ced55e2c5db1a35906a43e6e5d5ec01af47d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR59R1952474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e71e8a9904e2159d801e62fda9811d4b03cf66082224ea96463d825b52923e. 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/RUA1D1924414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842d4f4d9f863df268b8de6aa3fce5bfcf01d65ad35ef54412b2a697f1de8cc9. 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/RUA1D2004163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2580dfa62ea79bf4bd19ca9c7bb59ebb7e22895f8dcf69af6a2d68acd7b8fbf. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/RUA1D2004164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9d33a91974c3791a73a5028d3d77d18749976c1e48193233be1fb0e05e8374. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QMBZ92086003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e71dedd6d2d93891522cdd581289db281b2353e1cb690de4ee351b9b369109. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:25Z), 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/QM6N22111720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8bd6ab94907488a94545626ad882eddd4699a371f8583167a2ceca8792ae96. 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/QM6P42145685.