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 0xa2461fa8602671c1428d985655afe0f19e67554db1b9912ca60e2d354c101f94. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4943513-07e3-4cf5-bd2d-87314408cb8a.json and https://artists.proofprofile.net/proofs/artist/c4943513-07e3-4cf5-bd2d-87314408cb8a.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 0x5a3c3ea1b7d247bfffdaa54cfd63c1e493b5e7c32015a23154d0b01e1591b75b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWS2131507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ad3228bbefde5c8380ba84917155f6c487a395700d4de9e2d0cd5feea95e51. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZMEQ2409520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b64fd095dd482813c666301396c79f57379ddb1053cd59797f628d478d94ae4. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:52:01Z), 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/QZMEQ2409521.
The World's Biggest Loser (2025 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71127ac0d4f03c187c0ef11f783209b61ba6741baa56379333def3aa086924f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZTB42456537.
The World's Biggest Loser - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fce41f1f7d2fced03b9f1e0816ece7c40357340aa3d7c85d9d7e43332f7db4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB42456538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0788e13ed36d39d0be911a339419dbf3b16d5d3647176550237ec9e8735f0219. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:54:24Z), 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/QZZ792448468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb151509b947d658ab1d0057d2bbfda9ef17bb04948e9f5b4f06af31214bc4b3c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7W2490224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ce1fe8cfb264c70a056ea1633a132b9b20ed2357aac339ccc16f721c377083. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZK6N2527664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ce1fe8cfb264c70a056ea1633a132b9b20ed2357aac339ccc16f721c377083. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:50:44Z), 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/QZK6N2527664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abf3d9436152e26ccfb3953cf39ac0547e15ef6e7ed14cac994c3ed08653665. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:37:43Z), 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/QZK6K2528300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107693460310c006e1c5f1aa77a3ab9c4bded6a0e5fea5e66b5b31758820e2da. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:22:55Z), 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/QZK6K2528301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa5e667753833508f8c2ace530b30594e1bd6b05ec469ebf738f5715f95416e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6K2528302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf593a04549bca0b557807aa156b82b8bafd0b0fc6c50b76b60305dc1d4774564. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6Q2551434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3581099c500a77b2b800ab87ad27514c3cb3ff28bf8bec323100d6d6016e824. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6K2534821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d5523ceb666956cddba5ac80248c0ab9fa9c4fbc253c17d27190ffd8191d3b. 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/QZK6K2534824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ffe6a83d26f0aa3dbff001787f422324b613c3447df3053b09d43548489cd8. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:32:30Z), 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/QZK6K2534825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca5a3a8968c09a53acc81a070154d1e82f2dcce457654fab13f2854485db0a6. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:25:38Z), 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/QZK6K2534827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfd107dc01eab63a400cc776bacb277d42f584613d002706f7e529daa28e6f5. 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/QZK6K2534828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e92a389a66c85badec90156515d4431ba8a65df5f9e151a6beec451fae3351b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6K2534830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953464e3d3e81a2a702a2131b7e476d2bba20ffee5459906e710fb35a60400ee. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6K2534831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2f3e202874cfff688499647e76197f5bcdf2df64823e07d3da3ba3ed2609d3. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZNWV2579218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54007430a2126f872627f9efe0c465935f74c8296b35a7dcbcf3645271418ac8. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:23:35Z), 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/QZNWV2579219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a22171b43642b996901d3956be5066f04fd95930144d1ec40ef85e1a6202826. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZRP52553398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2f3e202874cfff688499647e76197f5bcdf2df64823e07d3da3ba3ed2609d3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWV2579218.