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 0x72dbc48548059338f5d29b7e3af496e08aded3bf37b68e52821856ff72e90a10. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62f881e1-5f2e-4b4b-8f4d-fe6a158f4fc6.json and https://artists.proofprofile.net/proofs/artist/62f881e1-5f2e-4b4b-8f4d-fe6a158f4fc6.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 0x03a21233872cdd6ec500c677a37dc0210ab4ff55e09a4bd7f95db32c31c4e4d8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ESA122492161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d78ae90a02c906e684fb906cc8f4d75197f64e63005b247309769904b4d9d94. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:08:50Z), 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/QZFZ42227388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d78a57d14f67a2916a95a70cd4d489a2a7cc75804bed8daeb0bafb3f0f328d6. 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/QZFZ42227395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c81bc91c549977c540c8191ee13a7e26a77becaa46e0b112e7d6ec439882f9c. 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/QZFZ22242848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf11e3bc61541c8bf5f7490db97487dd2b25722143cf43c731827902fe077341. 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/QZTB22278196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09905b499024e0376205f24e931dd48d254d00e3c8c96f416cb9a4bef794bf8. 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/QZFZ22389668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc487fb9acb9522f8072121823863b2ff89460384f4d717697cbe016393d9f62b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFZ22389670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d2ccfc07f18d3d42f4b5bcdd85dc5f67fae66d8abdd3ea5f81e6cdbf6889e3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWU2388311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee8d55bf66e4ac48a5433f9ceecb3ccc15ca7f6f5a5870068f7e8c82bd19a24. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB72388273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07d8c848618113eb86393e5afc8e0a3137bbfd01a10f8f4e7bf0c6e7470131e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:07:24Z), 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/QZTB72388276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bf06336d1691f5833e797f2486782511f5046dddde9005d8935292c57c4e5f. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:52:39Z), 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/QZTB72388281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d7353109977b1252b9e781bfb2437573d98c3285e55844808e345cdddf6f3c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:07:42Z), 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/QZZ7Q2449219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb2b26bd959ee4827c99c34e3884d295c293bd8e3e346d155487cc3c22bd53e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMFME2545176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca114caa24fbaa5a20c89fb76501e8f2bc6c0493d5569adfbd72804197388565. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QMFME2549924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf6d5fc82362cf7f0e8cb5301e8b311bf2e2dea8b228c5a93ff0a7b24535320. 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/QMFME2550064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72aa5753cad5e7ec0815eafc19645ad80aec346eed7718e125de0b61ba75e812. 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/NOAPI1598389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e638562e4b3880f31637ed9618d336a5a76d61defd0227628db4048e1ff51b. 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/NOAPI1790813.