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 0x74680a08695332edafa78e89a624cb24674115b4a2c80b0095ef225083621c82. 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/170ba495-e3c5-48e7-ab86-4d56aa24e6b0.json and https://artists.proofprofile.net/proofs/artist/170ba495-e3c5-48e7-ab86-4d56aa24e6b0.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 0x4f92928664a4b7b2e67b0eb449779205dcd13ce9c5553e3b6d66c065ad2f4020. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2431468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4ed075866c89bfdf0ecd0f75fcef52365e0503f1e832c4292b9ff9d7bd2b7c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2431471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f49daf49637e0cfd7f08ccafa036906c97fb2b42b788b8293821e370959cb8a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2431473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7eb4bd97d5aa3cbd12c96e812bd5746cf9c1d65f83cc844f6003775f24e848. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2431472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e45580c9210bb776f21858575cf2880514ed2963e6bcf02461ae8d47fa15da. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2431474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f735af3bafaff6e6108115593dc95f1066c0b0a3b3e7e09da636b6139dcb393. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2431469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5706e963fe0e7e2398d18cbc8c67e5e72e465f410049f69dca581170a768fb4e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ES71G2431475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831bf1d9259c8d1b85cd40193d36a96b7a0d1200b62e54de3fe84da9d4c2c5c6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2431470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f735af3bafaff6e6108115593dc95f1066c0b0a3b3e7e09da636b6139dcb393. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2431469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5b0435522f53fbdd67081e10299ba051aec7626b55d4f7ec5f0a64d4eb5512. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2239963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a15d771f16b3c47667b325f356118a1487d9b521ad2f18ad3a664fa765e5da. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2152421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934a72cfcb46909049f2639c8743f2ce64332c1560b5c456b202ea9a77ec01d9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2144720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b33185bfaa18dab7f8d36f844b0ff2eb24be81c1eeeb89bb6b7b495fc3b708c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2059349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac069a1529ca6e2103c337209175bde31e536e08ecc202752252881f015897b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2046573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96367e85110a45caa4737bcd31913fed38252232c227d18510348c46147b2aef. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2017323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6ada7b1cb3d4da71d96eb595fffe81ef8266251916898780863cc4e2abd6d2. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/ES71G2017339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d85b24c66d6ee854f6b8e59d8cc6a75ee925f7624ea8cbec9a013327c789580. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G2008023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef8008cdf15ab25dd496d293302ac4a86023ba71c66a314e46f6ba2a2ced3da. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2004738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec97268af723ef08c40ff7b544434bb26415f481cd783d9c384a24013e21e26. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G1941951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62812c06b70597a3c2ebe45fa41e2645cf289d2a26e94fb3fb610d9eb715441. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G1932546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb791e1c57e19db84ed6c211d58cb579ad9259f1d79bdad3e7c4ec92f844a43bc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G1840839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b591b89dc439d6ece2c0e426a55e0bb02e81a96e5ee5bb45bedea18335d6e4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G1734970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a5844c092e393f6acb7af5ee5be711c44f3c27aa79697263aacc30e6ba20e9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA42516107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76f28d7d24456aae3dbe337e8bfd33e4439f83b03ee1130bf0421073dd4cff5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDA42516108.