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 0x260ea21d876622b3ca6804630daf34d464885ea055c9084b58f9b036b33d8a10. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e236cf11-d4cc-4008-beff-82ac1f85114c.json and https://artists.proofprofile.net/proofs/artist/e236cf11-d4cc-4008-beff-82ac1f85114c.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 0x52bdf71e9bf12786a9e17a64453ee0e92f38fa92fe8954203606b0417a69d69a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USL4Q1852708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bae4fa0bfdc6e2ccdb46b911194feb75188b211abd731e3da8c3ceb6c10836. 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/USL4Q1852710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fa2f3c249e6a3fb1a4dd753154686f735c697b49a160332b3739f5031a9857. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4Q1852711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83366e015dd13eca60b97ad27a545bb10397fdf4b2ee72e09063e9941b20628. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USL4Q1852713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb78fb6ac4bd0b8f590a6d4ce7e9d1b551c6d354bc642aeaf95c7beedf9fa9b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USL4Q1852714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1951b4ea4ce2a7f24655e6c7616610ddd6f8d08abca2674a1280326dbdc5eb. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:38:15Z), 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/USL4Q1852715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb605e060d102780e37f1f2d9b1d288452a01a6f5d5b6f8d10929a527c24dfa84. 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/USL4Q1852716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7acb427732003e4423b733f56548888b472a390776dc04bd0f4c89c0dcc790. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USL4Q1852717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a854b8d544985055414f35a33d6b328a9028f6960ec47356404d6c072ac2212. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USL4Q1852718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402d57ad40cd2cf1120683d4fa00a7d1b5cc90a994c3f1bbde13b037d79cc249. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:37:32Z), 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/USX9P2424276.