thumb|The destruction wrought on Granollers after a raid by German aircraft on 31 May 1938 during the Spanish Civil War A civil war is a war between organized groups within the same state (or country
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 0x289257b0a5ba88a9ee358455849d4f9eb0059b06db51d28d851a647ce1f1f48f. 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/6f788710-8e4a-435e-8b6f-36c6212402c5.json and https://artists.proofprofile.net/proofs/artist/6f788710-8e4a-435e-8b6f-36c6212402c5.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 0x74cd90980f85f0fb92c5885b54986f9a662db0bc119ce40a4beb4ae6f6c48cc1. 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/SEXTE1202103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5249a0ae3a38169d0bb213609f05136264b451dec48b0391002a783364c7579. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SEXTE1202104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8732f53bb03fd8225d21fe98c938215e97b2dcc3338c618d9192e06b50c69c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/SEXTE1202105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca89235829afcaa3868ac8781bf8b64229b7ecbc67d21e0f210a05ff4c893457. 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/SEXTE1300606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfcf420e5975ade1b49e2ad5a5c2b53bc39e368c7f5614a4f92dbba04ec3434. 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/SEXTE1300602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72db0f6c57f14ccafbff09610401db395145f60d8bcd5e1c8bde5523ec5603ab. 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/SEXTE1300608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f6b6cefec3ec207c481a3d07a5a01c6b244a0fa92384ef99dfecb9dcd2ca5b. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/ATN261556404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be16c328983c7d7970144b17fe707dda3550c2a060fa1b4594ce013bafadca9. 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/ATN261556406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc7974eaf8deb837815f33bcc5875560e840274db8daa42aea86d44051e01bb. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/ATN261556408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb096da4250f805a66c25e7fcc25685e27974d8fdb17a87a7026362860f2cfe9d. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/ATN261556409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a935fac7f6820152b1c0263b5deaf5a80277a3ca0707f40131ed0b62236299. 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/ATN261668902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf0a3174c3d712fd56d540527405da1c246266402322c4062aa6e3e4879600c. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:07:10Z), 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/ATN261668905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc66b03bf3ae87787c1dbb26b9a1e2b46e1c2580611e8352f4b0995cb6142a5. 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/ATN261668906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382f52edcfe62b6fdbc5ec9d7b580736a5584ca2d29daac673abe91bf1f46ed0. 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/ATN261668907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6b9e95280206d0a0d73d12639cff81341a62943018248c3d6f7844b2abbc05. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:38Z), 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/ATN261668908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35375b056e16cc39b878f457619c3d6e3585b35b00084d1648ce32a866a4b68. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ATN261668909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3d7ce5c6887588c71abc62703784f2475c730799b827ce6eb544baaf702818. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ATN261668910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72efcfa7da82c41daea3a9b6ab70fc24cadb59a5b059e1e268487499ad97a183. 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/ATN261668911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9224a90097276688975923816a4df560dde5613550efb4c7f18d9ff79de8c5. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:46:45Z), 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/ATN261668912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae46f302ce1fde1f55058418ebb2465bab0cfe8b0e87331e8463a9c6ac7cf9af. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/ATN261990604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c3fcc093b11cea8cefcd4376e76dd0f2eeb52c54ba0971994e80e1ceee863a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ATN261990611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f31c2c8b347e42aa748867e0e42dabad32deb38b667b9783e8d1bba1acbc2f6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ATN261990602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1ce830082955d47f64b0013252a2ea4b937eccdba0d2ecceac4497cf8dd46a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:23:37Z), 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/ATN261990605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0f667f9398edee705692b335db7e1f243820ad7010e496d0d9fb95807762e7. 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/ATN261990606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea6faaa671e01a815af45d79295b1734d6939fb0db517aaab4376759d7fac2d. 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/ATN261990607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91529ba18c260d96b8adabc546efbd2da75bf1bc2f7fd392ebf071b89e467f2. 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/ATN261990608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfff0ea72b76744975493c6599b3ed9488cce1aa454306a77f9d071e9dd24647. 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/ATN261990609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca20eebbdd1bfddf712c9ec0f49b555b79827b2aec5000cff5cc4c6bac0c769. 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/ATN261990610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ae0559e5a62878ceff217394656e5e1c20dee4a649202d29554f5c84a4bef2. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/ATN261990612.
The Civil War (Original Soundtrack Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdd93d97bc2438bdc3a2837f46722cd00979d2b408975ce06af804e6153e8dd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USNO19025615.