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 0xfa0e6db9ba3eec16d4645ef342791e44049df8fa90c11aa0e5d8f76a01c8b697. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e047d376-3b74-49c4-8e70-d9c37daa6bef.json and https://artists.proofprofile.net/proofs/artist/e047d376-3b74-49c4-8e70-d9c37daa6bef.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 0xc6c72e2435d0d8b1978dd32a9909e3a2ee510d0f2c628ad89e495c872989eb7c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/IDA049822103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1624b9074a30f3c865c0ea2624dbc4f0ee9da5592fe665e50665130bc83b954b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/IDA049822104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5f5c705b861d629f02b55215378cac15c0140435b9fd760cb7c836f0cea373. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:54Z), 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/IDA049822105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dd73575ded4c6a07102d7af34f380d1ded82390efa0c7b7366303d130798d6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IDA049822106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d15231f91f9d54274c1505d58071ca0f019fc56c8878da8720b529bd3a3c2d0. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/IDA049822107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac5bb3ee2c60b1db4826a3fc0e05a6c4be4178a1a5ebc45fbd9c4d837259595. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/IDA040022202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877694491b75799570e0eabc4e1c8f9b734f13beddd07b6467c97464e3aae3fd. 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/IDA040022207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f80482fe02276e09b63dc05faff6f2f618c87f401427d2ac68b7166a737d86e. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/IDA040222301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8f3fb0eec103e37a1a3ef8848459e0148bb111a1aee69b78f37d1f64624d37. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:52:18Z), 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/IDA040222302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d10fd7383afd5c005e7c58293081547c9a60faca5434ee689fee4d454a5040b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/IDA040222305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dcf10442ddc3854445a0a9b1501fe1b1d7c660dcb6da1d1acfc28f8ebbcb9c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:50:31Z), 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/IDA040222307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7a9eeb9dc6a36dff1ab528ca11a7a0d98e34c211c10a0f11cf5298a9356f5a. 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/IDA040222310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87725cbe09019841fb7296ea6b5c33dd6fa606c3bd4be0a45d65a5fdc0b34049. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/IDA049822101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8efdc970a1402101d02e5b79c7563aad5ba13b50305e7a0fd7729104978666. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:55Z), 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/IDA040922402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc7e7197ca4bede34fd9a386263f6c802f308ecc077ced6c2b215581c60781b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/IDA040022210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351377647344316ffaad14cf844d44111af3ce8c15911f5c50e6a06bc9e7a51c. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/IDA040922403.