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 0x3c833eef1bc4b333bade8a6f52f95ec83fcb9c0129bfd0c56d95d626a2a4769f. 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/45a40090-8a05-4b7b-a5ba-b3c07f5f0c98.json and https://artists.proofprofile.net/proofs/artist/45a40090-8a05-4b7b-a5ba-b3c07f5f0c98.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 0x7a80f07d9c34dcaa649bf3be1bc0f3ec133f1959081365be63cdcc6a73357905. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA82266232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b86182c1dfb9b13f0283a45b72606bfa57382ed10391371abcc62cd14a60f0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6K2288269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3ac78ed88fa8ab5d5550912dc222c6a63d1fec4e99eaf338fb17c5d62575c8. 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/QZTAU2296972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e6594d1f655559d045d4955e1b05bb29646e0968ff15e01a4695d9e2be8d6d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWX2381691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6f2870a9fc774f68db6f82b60936d0c2c9149d191dc17dacfad578a8c27f7a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:45Z), 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/ZA56E2305263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a020791e38e1252ec5a354c5338af0336396593bf6694ddedc1f6d5d924c78. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZTAT2448669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3820caa93daf508078e51ec6a8eeafffcdecbbe5ff59293ebd33feb01966473. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFH2482562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff4993edf8a4d54bb36547a9a5f2a1eb408dfdf4741a7563f5d8241f397e706. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:55:57Z), 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/QZWFS2409425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dfb544a9b54319e8ff576d4e69bae19abba8c0aacd2ad86900cead7c0089e2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZZ7N2464349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70775108783d97da476b517ad01e743f0491c41811d816a193991959bf82aa6. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZFYX2578476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ca243356770e14fb2aee65a88c11bd0964b93e3a23440c4897268f8a3f26c3. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZK6P2537138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382ef3a0c7dc92becf7fe1ffbe6f446f20c4b247ce5d0029c53f4dab0db9f2de. 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/QZMER2563425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c751bd70d36386a69a2da5459d0ee5de39d09ed8fc7db7b67734badaf435f9. 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/QZTBD2540632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea5bb0c242f9a4d547e1a3050ba6ac89e8f48a0319fdea4dd396991951df735. 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/QZWFF2522939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5954b90cc13b84dc443a64ee119f443e441947ee61502f3106e8301fa88e6279. 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/QZZ7V2547386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402dfd24af984e07ffe7975e3436413a41d9e9906772ca1dc0d245e102032709. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:55:41Z), 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/QT3F82506233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3d00c2a2b24f39bd6dece4da31519d3556064c26bc7e86ca497127c22e27d2. 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/QT3FA2523410.