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 0x45e5d72ae70f2aa88579ebd8a73be42005f370da3c278cbcd609156caacfa239. 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/c57c0afe-c1f5-4f8c-bce0-5f50514c22d6.json and https://artists.proofprofile.net/proofs/artist/c57c0afe-c1f5-4f8c-bce0-5f50514c22d6.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 0x4edd7d327b2571ebcc1b64f2a335e963c64113ee22617f81f2fe6057b8cbdaab. 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/AUBEC2498783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d5f46c27620c11b9384b64c85bcf6c43a67b305d9f6088b83489d99f4dc822. 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/AUBEC2498782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5116d6fa3339b850c7fa76da12cfa3ae7a58050cc457533ea03100bc3c96078d. 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/AUBEC2498784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80999ff56fe9841f47c1afdf1c6f0488127a3ab579ff6f2e20341479fc6fd647. 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/AUBEC2498785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd71f9d30352f620a94ac38eb64843b8afae9790e72bd372560e0ff76a9121d. 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/AUBEC2498786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b85f3bf6cb67a3720feabbdcd2843aee10e96d5f4e83f5d6d5714ea243e94ed. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/AUBEC2498854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0cfd1b8ed564519efd9619426bc2be255a86dc03adb84de98049585571a8da. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/AUBEC2498857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9384e1b91c780b5332c79bd753fef38b9a0c62a9484b4ac6115bb765dd8e886e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:39:20Z), 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/AUBEC2498856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27759f89c487e1a4fa935136bc6431924f6fc6b35de0174936356b191a8e968d. 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/AUBEC2360051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc303675b67d84ed9b3a168e845b2e7f4c3b62728f735ba547d8f455ed7201e3. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/AUBEC2360052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b237c00ec9362bed40c0a61c98464d6ac73292c2808a71f69930599bb7d2dd. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/AUBEC2360049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173da53c1234330b8056c0d82c409d8a4b149132b433b682274d70c1d3feb781. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AUBEC2360056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1e9b96e8678ec5ae2ca036d49d5e1e3f57a563efe78c72bba8a7fcabc0acc0. 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/AUBEC2360946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198f3a0c99221c73533a07be6345258a4a77215fd0a6a9570b0f938c3cca0876. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/AUBEC2360947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd060ec409b2c5b9c5164fb79c38ed26e92022d1789eba8132a8a93375bf98e73. 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/AUBEC2360945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85c44ab12ef7df7d8ab53798192ebf0ff9cdd7f57b730bf8792e9cb0ed94766. 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/AUBEC2360942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e38084f7fdb01f048e9e5bf6ac0dc7480e0a8f7a5b6aa0188ddbc1e62d3780. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/AUBEC2360055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196425f6c0145725a81f4424945b16d6aa6f2243b7b853b627bf605771ca15cc. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/AUBEC2360944.