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 0x49aae6219b890764418e40e5fd4bb89b5443e309e95b1eae7d12be518304eb2f. 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/b1ae3bb5-1f02-463c-945c-2592ed3f2da6.json and https://artists.proofprofile.net/proofs/artist/b1ae3bb5-1f02-463c-945c-2592ed3f2da6.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 0xb77f6bf53c3df818b68d44c5db82211d0b6deafa037af772e0f46952e5b645b4. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/IL6652001422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e46677c3b5c0331bcaaf29a1fb6b00559550718c99b8176446debb6a78fb4e. 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/IL6652001849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bb463bddad8e3150ac2c7d6ef0c871e2b2e14118802efb4dbb0a1a2d27ba8b. 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/IL6652001847.
Tilman Sillescu: Symphony No. 1 "Nachtlichter"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc101774788c41c8881a8ecba479265b72ee9fe329da76ad07c80acd12c57ce. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USA2P2454548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc331c0eb1d90158515f20ec3b0be5a9912151d92448612e4712ea12971b63e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USA2P2454549.
Total War: Attila (Original Soundtrack) [Deluxe Edition]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc634d427886f37869320aee0c8675944ef848ddcd3574a3c5c2e389eb63581. 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/USHM82402401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e85efbe77126ef159b34e26fc470af0c1a930807c18f4da3d11208d512dccc4. 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/USHM22456054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac608ba3694f46aefd3f22dbd5bb980692fec47a19de280ace965798cf14cdde. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM22456059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e7fb3a232fe6e9b4b47e034d3c4a175de93169e946edc055b475dc76024075. 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/USHM82402404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac84f61d7ed98915bb66008fb890d0cc9804c8c32409eb9d30902d72b9c417d2. 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/USHM22456071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bcb79613be66faa749cf05133f96abc82190b98a645d928a26d1344293ece0. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USHM82402390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fb3fcb28aedfebc56e2ee0277abd042c6168dc56a6480aa79746bc3504c27a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM22456077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081109829237a4ee616823270e85c213ff22a888047658f46e478f893c8b26bc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM82402396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e790c97e97ebfc72c33ee035bdb966639a459f5ed225bc36207d4ad6a649f7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHM22456070.
He opened the sixth seal, and the sun became black
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ea8f807a1f590de50bf4423a0a9e1484e0b32ddf26239dd5081ff537c01db5. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/USHM22456072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7efd5ae4a5a8e2f278092add480ea5d8a71775ed1a2bc328f391ba501a16a5. 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/USHM82489046.
Total War Battles: Kingdom (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf610a2839a3db1ebeb54665618047741f9579cbaedeaae98cb76be326d9eced1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHM82476725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2677cfa5600a3ed66d9ad7a90de1dfe47eeda351a3f871776699e6e926d1399. 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/USHM82476728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a06ac1541463f42a4d49f724af801b124be3bfc088db3be392c8ae593fafe4b. 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/USHM82476730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765b30f759a94fc16e73a4526fb39348e98b67df6cee43268261e21a6f26d6bb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM82476739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46ab9ee91ed5430e908b3e6f1deabce354ee6dd50336e00204f699357d6c645. 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/USHM82476741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71135d29a0e6503da35241d1f1379785d7cb10cff07e4c9733a84514485ec6f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USHM82476745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a165077fe27e0e95c7e2ca6caa5de44b478dbfbd0eaf61ce09bf5a4a084c6b0. 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/USHM82476747.