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 0xd4889bd40eae731929b4cf4d57ab6f0aa189c834b45feda8188260eb3941eee9. 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/f3997762-0f53-4cde-8d3d-373047667ef3.json and https://artists.proofprofile.net/proofs/artist/f3997762-0f53-4cde-8d3d-373047667ef3.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 0x4fc28ca6949d57718b2b163f1f138dd2aacd0759bb01d2c9890f81811b2525d2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCMEA2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45148af311905c6e14e374b0230e9b21fbe8b10045830870e632c06fbbdc8fbf. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BCMEA2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13362f2bccfe9df527cf4e7ae432d95a8b1604cc08a4817cfc2e53313dc6ade6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCMEA2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2a5791b57d7974af113ce745f009300a4af1a147effbc443835aa66b7e1e52. 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/BCMEA2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed9025444324219c50274470f9e56a27ce6d929fb582477b9f619cc0a17c25e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCMEA2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6625f5f70754d9aaf7e3a2263ac88add6fb2be50ede782709a5d0657cc9131f3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCMEA2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1329d7101e3c1e893739890eb80e88b212d934c882d58b32c9bf9f3b2c4971. 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/BCMEA2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51a49c7bda353ad282a67bcb80d2a76c85b05e7d030f4224bb150620885f759. 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/BCMEA2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac5a549876ab86e245e5d07cdaaf9228fe38f24070c9881305e53a768f55511. 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/BCMEA2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62d2fbcc8e67fc3bf6a74ca2fde0dfd4adba49153808bc9ed6bbbf50c229b82. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BKIEM2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45148af311905c6e14e374b0230e9b21fbe8b10045830870e632c06fbbdc8fbf. 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/BCMEA2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2a5791b57d7974af113ce745f009300a4af1a147effbc443835aa66b7e1e52. 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/BCMEA2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6718bebf8d2cceca882b754a52b7325dbe9c04d5e720baf1f1e89a29dec8d6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCMEA2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd707db5d849af337726f6ae4337218ad76388973a933c7d80b09029d3ce4e1b5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:13:51Z), 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/BCMEA2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef7d96b7a154eaa52b1e0f95915d4e770c5ee01dc3f4844c5b638cae3c5d801. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCMEA2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acec0e81165eb11558de2113bc5b24c17755ca47801f6815e8f8fc52d01b4c3. 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/BX5EH1900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1668fa038fcfb6d8747099288ff5baa88f6df58b9ee549b191e95cde98959c55. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ5AB1934681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ad71ac2da54a7eb00e92b6ddb393084c626ae0bd5505cf0c69322ef9b0d46e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1748398.