thumb|Shown within Loch Lomond and The Trossachs National Park Loch Lomond (; ) is a freshwater Scottish loch which crosses the Highland Boundary Fault (HBF), often considered the boundary between the
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fb63a89798dccbe5dbe7d3af1d648dad2d2d669299a3d92a90970a302829cf. 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/fa7c7227-48f3-448e-8a57-49724d1b79dd.json and https://artists.proofprofile.net/proofs/artist/fa7c7227-48f3-448e-8a57-49724d1b79dd.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccba51d4dbae770400292ec391f0984e6239f3886512a3c7b1973eb2a0603b1a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/US4N80700110.
Blue Lead Fences - 7" and Digital Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb8b7e1e737c14232f8f960eb7a7467fe61cfdb43baa4f42d42363efb487a3c. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USLN71012754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb8b7e1e737c14232f8f960eb7a7467fe61cfdb43baa4f42d42363efb487a3c. 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/USLN71012754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efc3b7567658e71519c7c0a2a8b3ae8b9784eeac26ec8d603b967d1f340b945. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USA2B1603913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e4607e7183c7fdac7461fab1ec2da67d0d82dc8433c557ebf891dac5fbe437. 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/USA2B2201084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6afba4f8e5d55bee11faf4d515e1c62a1d2e7d546b324d7eab6395f6022a3e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHN42583207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6afba4f8e5d55bee11faf4d515e1c62a1d2e7d546b324d7eab6395f6022a3e. 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/QZHN42583207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb8cfa69a7d0c288b4b7c4d13336ab6ca3dbd8edcb7778bb977e8740e0f42c4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN62533986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021b7b46c4a75f469444896e644a20f375188c3f67177884ffe4c5e9b836cb78. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZHN62533988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec80a9caa293de09a1afe092aeab0d69b32d37f015b94ce0633fc1bbc4c50e9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZHN62533989.
From the Land of Ice and Snow: The Songs of Led Zeppelin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978ec41e9f176aca370985420c00e71de914479b95a298bb761feba0c326be54. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US2X81086311.
The Boxtrolls (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc08f7e07f209f7bdbad947f665af9abb09a5ee94d4d8ff681bbde700104107. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USQ4E1401076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf685848011d1e6e4449451f6660869d6388b5010d139f83198073693cdeb2fb3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USQ4E1401089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330abeef02c6e40118cd9488019180e22720b7d4eb968b26bfcfb67313b65f4f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USQ4E1401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d18f9bd3c9d98963dd1a7ee2f309f06d7718c133ced64c93f45fb0a9a8ae09. 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/USQ4E1401091.