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 0xf758057d170108b151b9849aa821c19e56c673730e45f41ffb0d550f584f8b55. 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/063d1567-abb4-44c5-a8fd-86616efc5f0a.json and https://artists.proofprofile.net/proofs/artist/063d1567-abb4-44c5-a8fd-86616efc5f0a.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 0xb4b3f6374f6824cb0daa6ba952b57042b32b2cca891e881930ad865fa4cfc626. 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/QZWFK2414654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9ca7e0b3c8d2223581b7f0c505a5d80eb08d4df5bd3b82ef12f5b5261ce9da. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZWFK2417404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c184e0f86157749a2b8622a1761a4907a1e9529c3a3ef127ef48ba60c3ad64. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFK2415842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121b3e23e8be86583c68ada9b2b5c21bdac0312f0a8c8818f0382a12fcef6719. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFK2447951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7987a239bc9408f5ef7d36be78c1fc2b7f49c5d7f4dd40fd05fb5ebdebe4c8c5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZ7N2430886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1413494023d8b1cb0c4fb76fb8d5877a49a806d1a94d67ae74287887e1595701. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZZ7N2448594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a1dfa365cd2364779e92f1c024439b6f527278140c446afc447363406aabf4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:51:03Z), 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/QT3F32465050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bd87feb1cee1627aa0566f51cf2520a2197bab31be029d4347591c5ec9edda. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:47:47Z), 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/QT3F42407917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a07e597a1905f3d24b892600512111ddc994516a99d5e0fcd10f1f42d4e154. 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/QZFYX2504360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50edc496cbc5d67d15b35db3d31987db36c4786a14c2711f2917fd0476dfe052. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZFYX2502644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa987b3c433f536ab408c798c6374be0e717af8cf14868cc56508c539b5ca038e. 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/QZFYX2504350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a5bb25f9ffa98f37aabbb80a7c82f9eb715a7101cd9c35f1b7c8066d5c1c08. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFYZ2507206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70957d6fb666c77fa213467784dc378762420cbc13d3460a54dcd1ffda2697a2. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZFYZ2503301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f3aa28dcf20650af2c79bf83c173b790ff98fc95a5856e812c8ffb89bba28f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ72571864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3172987f79bae17d161fe0bff824f5ff0f6fc79a55a7086ca79ec31f999b012d. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:33:57Z), 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/QZDA52568089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86d6ce5b6c1ffded5fb423783af5cc01d912c1803588708a775854165b92ae7. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:24:59Z), 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/QZDA52569746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ce1fe8acfb8b28d17a809c7916e4dc396d098b4088ae45b52a1bdb02684ae9. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZHNC2587769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37c40a10447a47ca343b3057c22c3cfe3db174ba1e0c0e77b5e025cde71f05a. 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/QZHNC2589708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc163eef0fee26963e26e95dfd6c52b2c0290838d0d67c00fadfea41ce9ef462c. 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/QZNWQ2562254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18a3726d5e17cc6d8edc2729296980958515270bc528462714ccb90dfdafd4f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZNWQ2562249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb064e9d5c3d530580b8ce2d1c4052db28d4a6257dc654dd671b80ae8d67d1a0. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZNWQ2560486.