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 0x36987323c72f0ac11319d9c5642fdd6590dc56e02de803af52244942aeb91414. 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/95c1bff1-a734-4e99-b1ce-84f984b308a7.json and https://artists.proofprofile.net/proofs/artist/95c1bff1-a734-4e99-b1ce-84f984b308a7.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 0xc8f364bf82ccc3478f8fbb0dec19621bec468661beb4fbe2bb2037bee88d1c5b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USQY50940028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f813f1fdcd1defca2a75f3d8ab30c6f6754e0cd489e462c8b5cea47f1a32a8. 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/USQY50940033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24ad4ac8c78497d8e4d9b89e78454cb5f3e5a6989fd9066151606e29cea1f77. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GBKQU1299646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb3ae6d1abb93218debbb9973972cc36f42bd46d692ce6cf487d36a04f65338. 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/GBKQU1299647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecf7982e3b87340aeea4048cb93837f0397dfa9f98525b16180d251e0ab62a2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:38:30Z), 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/GBKQU1299655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef11e70646a258cad38c2762add588b4f72dfae675bd1e3fbadae94f68748f3a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GBKQU1353330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a864fd6b8d888a781a3e2fc62a2656953ac00da921bbf62d9e48e0221c6c3d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:59:52Z), 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/GBKQU1353331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf937a8db5583f2c3d8473376b8e47afed1e1518875895847bc4710cd6a645584. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/GBKQU1353333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2fac83a4c270cf2dac3a4977d7d1dbaa9086211e8dbe273ee7c7bd4c92cf78. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:00:07Z), 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/GBKQU1529771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e720c1cfe26c99403b5ccbe3dde2b9971b3e29fd9538095b54c8ed9fe6b0f8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/UKR6V1930394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4d9735873fb68df0214d2538d9120ef918828d45775794813b2f2476cca282. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBLV62013166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9159c4b4db2ad02d733db3aa1ab4416ecad1d3b26ba52fedd2519bd26e4c4716. 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/GBKQU2512848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1325e1759069a7296db1f44ac4faebf902b0f80412d87cb035709a8cf25bae1d. 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/GBKQU1016409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240e72e8c0406d881321491632dd88f59931d279f0e962b89dfb3b5a7b7993c2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBBYB1702927.
VuuV Festival - 20th anniversary compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7586a11ac86a149be2e1dcf237986cd9ea5a226b578842cf2171a6b742a2314. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DELK11100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b093dc8df2b4c640affc3f723615c9c834517edea318e24e9182b2a1ef23a6. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/DEGA21200806.
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