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 0x3ae8d53790c7f5ace648e9cfeb05c0c0411cd26ca0d312d623764e1a1c2a17c9. 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/4b6a267c-9219-43bc-9e13-73dac36e6e96.json and https://artists.proofprofile.net/proofs/artist/4b6a267c-9219-43bc-9e13-73dac36e6e96.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 0xd82048f3607961d597c9cfae9103444b4eef0705dc4fc4cbfe690ce032579ac3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:31Z), 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/USL4Q1886624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1121e4bdc3018247037471b7716e842f68b27e0a29de1fa9396985df32ef1d86. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:32:17Z), 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/USDY41950057.
Fears and Desires (feat. Billy Buss & Chase Baird)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b89abe8a9ee70381599ce72c60fed796501dbb047bf3a132c1e183033a350d7. 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/USDY41950058.
Instalude with the Ox (feat. Lenny Reece)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188898209d3e147966d96d7199582b5b2921316dc3f13fb1354a9b717b012d0d. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/USDY41950059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0907662c6dacce319e1d4d57432a0a883a71a4b9f2182e1926cea3232fb0f9d0. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USDY41950062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4856a8306a608315d0d921a2d5a79f777682c7ae0532af3716e970ff38e94da. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USDY41950063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82048f3607961d597c9cfae9103444b4eef0705dc4fc4cbfe690ce032579ac3. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USL4Q1886624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246a8ae9d007c04962d258f015d89bcd220bff99089c502bc1a1c3303de4edaf. 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/USDY41950064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa31fb3fc7d7eba83b8dc0926215be0dedb68a805c5b1e3957a705b2933a7579. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USCGH2013398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54764dd619d5044ab61d3a9cef49c8aaa8fee47b33cb191d839c834f9cbf326e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US8JA2117002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006332a06a480b4b8fe0c0647806b290decbde1957067a637e3220cc826eeee2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US8JA2117007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155ff8fbe500c7c870ecfd91d9297d2a3780afbb8bbb8fd6088a109b80d22aad. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US8JA2117008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584072628c1547c3e9424d9330ea5cc9315b54695dab30f5739411470520c315. 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/US8JA2327001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7586e605ad339e07fcff7b72c0e2fe5f16b778f7c1605a23757237cc41b59bf8. 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/USL4R2394363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee342d232e2b136d7a377f9a4e69e46318d4471561832a4fda3bfab9d4c1d83. 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/USL4R2394367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22e4f3b92fe21c8c6ae241f3d08faf5e53679ac738223f3ad109dc06fdabec3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US8JA2503008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1bda17db55c9e1ea364734a26fe0beecfd67688b076232fae777a766184606. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/US8JA2503009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1145d9dad530d079363a1c304d95a4fd63ab4616792ad669c6fb909a3aef4074. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ782572728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f99fc6725a4c14f7ad9b0377bdcdbfc3b0fed916b84aa72014d67e81b9a0dd. 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/QZZ792515275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caecf4e7a9fe8a0d53021d01b23d5f2a740c24b6eb5c6753436874bc5fba3dd. 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/QZ7362200241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95e2e7de98d2de638b2c2fa75b08d87ba5a6c320ded133cf86a58ea55fef49c. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZFYX2447138.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch