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 0x513af7f97b4d7a39cd629eef8a0a754c198c673c491bd49cf8d55b9bc687c66b. 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/88bb34d0-0b1c-46b6-8a64-253f2ccf89e1.json and https://artists.proofprofile.net/proofs/artist/88bb34d0-0b1c-46b6-8a64-253f2ccf89e1.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 0x32e449fc114b0bff90525b07d88ab91ac5ff509cad0b790438fe104d449003a3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBUM71805259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76948f511336ce275c16c5a2b3dea640aaaddaffe99bb7d7334b9bed1178d198. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBUM71807004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25bcd3f3ba7d26c5f3dcfd5c2c89f3858675611a455f28402cbb413facfb70f. 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/GBUM71900527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291c2b433908c5a98898a362df553577430fec4068cafdc3221d0aa3882d0907. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBUM71902915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e22d76d3917213f6c1dd7edb08fdbb5d8890b9bde0e93d4149f3c483effcc9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBUM72000468.
Once Again (with Kelvyn Colt & Diztortion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa427fb5dd95764d8b10041bd8fa99712ace14155b09be4a53af37bb9fd4fd81c. 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/GBUM72002293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6594f1d7b089ff592418821c6af0ca7a775568182e07ee97dc292b86ac3da2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBUM72005009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d6911ec013008ce38d7c5d95e817ece18bda47a0b93648d60e07870f9a0ecf. 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/GBLFP2313651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7011a678ec68770e3c6542e02dc645238bc4fb16917cdd448fa4baa09ac93738. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:42:16Z), 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/GBLFP2313658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8be754c9830d67c350cf3c2ebecb7272aede5a31c0be9e6250cbff09a070331. 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/GBLFP2313659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c269fd61205c519a6bb9067f034ef786e2ee2afd446c04d0f7d9584469a7fc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBLFP2313662.