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 0x807fb2c4df17763d566f2bb8a652a86c796fe0c5a8283a475dc4804eb7f50064. 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/c92e8226-82cd-43bf-b2c8-77c58ffb457e.json and https://artists.proofprofile.net/proofs/artist/c92e8226-82cd-43bf-b2c8-77c58ffb457e.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 0x97d691444dc131233ffd3eae44f183a3e58a5684aa461710e022d1eec9559554. 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/ES71G1721471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5bfce4b10ef3d0cd3aa351a1b5834d2317937d5c80c1eb2f0c41d79e79d53f. 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/ES71G1721472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2eff573c1def7d53728e0d721940b0e937988be1ed102acbfcac87ef63e87f6. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/ES71G1900492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ffffe85983589adc063f0af60b5d2cde5435e5116e51c9f8d0fb157a298232. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ES71G1900493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d8506034472677f40b47ff4a689c76e342c3c4211152612114b313a75cc010. 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/ES71G1900495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97926e14453aab3745401bf2eb1038bfb8fd086a6e512fb34fe8bec415427d86. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ES71G1900500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f226798c621e05c97f1440948bf8b3e33aa515b64db324c519b3a7b591e4380. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:38:21Z), 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/ES71G1900501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc98a959e9a00c3af5e9c33ca8374cbe8f33a75aea9d23c463d096ccbc08556. 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/SE6QE2168900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96cbc8df55bff6ef2313498ed9f6a6ccccdb85f170dcbadc3ad98727e26a937. 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/SE5BU2209396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf061900b5b126654f722fcd1728fe6087ac57498e9851929461c0d709c28d7c3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFG2346299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0575f874f1dd849d6c8880aef5d850a537a13916c0b795b85fc9e5a6d3af5c. 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/QZMER2472170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bf4a550563d8c90bdb8c12a3b6ad53e79a09cf0cf85216a6ea7f6743ed2fc6. 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/QZMER2472172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccec03305e5adaa7f039c6cfba203bb7da379a47ce066b2b9269919da191409. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZNWS2492507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d5a59429eb7617b4b00bf432ee5b1c87a58673200d74339ce484fea7895359. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:26:42Z), 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/QZNWS2492508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874a2a58584bc50a4a33e3324bedb885dfb5a9f33c1a91a9fef7eeb7d7150d69. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/QZNWS2492509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c71722471f5eff1eb7e6480757abbabf941d1de440a2cc2efaba89dded68ad6. 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/QZNWS2492510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd424f28326f1ff249943d8382c784fe638e350e80449de56a26908b890e9cf. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZNWS2492511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f62ff9c3afb3ca7f80190666637ccafed6a7f63f4b9634913b1549fd996611. 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/QZNWS2492649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaad507a0353eea0c579fe28088bb0ee92f64e706560f57af7e70cda3480068b. 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/QZTBD2467317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcac8346d94f6f1dfd2556fc4fc2270e28d8388cb3ed84cafba24b156798646. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:22:56Z), 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/QZTBD2467318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87bcf157dbf4fbd97565189ed1c250042a48724dea3d0f11859fc7c4018758b. 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/QZNJZ2504259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d187f7dd855443f878d855cb8271c0e8e5e24f59e37c99fac6166f4766c8c5. 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/QZNJZ2559571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20f869e0e8867b2dea5284fd4e4418b4b6cfd3689f3c0de84f1b7b4de5156e2. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZTVM2563360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f147ae6cab9ed7b4ae51fb89b9b9e3fb57eeaf62a4b4e6f97e952de15c7297c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTVM2556845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd00e30a99e91f58e1fca86856b30c44d2e81c1f5c6bc04f5a551493a4a0e226. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:33:11Z), 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/QZTVM2556846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de3c6a6af3b1b8cb207ae61bc499c2dfeb23192f0bfe17e5be1d871720fcfbd. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZTVM2556847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822d42fba20ee798e12ac909195575f5cb725b8809660c100f1cc200ce964823. 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/QZTVM2556848.