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 0xb44d3abf20e5dc167cdcd355118ccb93856b98f9093e82091edbbef79ce363e5. 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/b0bf82fa-c99b-4a96-9136-886b32b10cd4.json and https://artists.proofprofile.net/proofs/artist/b0bf82fa-c99b-4a96-9136-886b32b10cd4.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 0x832c13b7ba643c81e81dd082c07bcabcce6b8448ad751f9ee1b11d888089a728. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:39:32Z), 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/QM2PV1702627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfabc93291fa048be8f81f185cf4c2055ee2a397be514652cd258a172faaa919. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:39:30Z), 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/QM2PV1702628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc82b3f01bd879cb8fa486fbdf3d52267bf7ed6395e9ab7f2603c864a42feb8. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QM2PV1702630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dc2b0c7e4300ca520edde5b230b87988091be4be1aeed4e0d58a5d1a54f765. 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/QM2PV1702631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a3c960407c70a7095bcbdf83cc52920c98f66ab1c86037905a314870c7f5d6. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZAPG1774085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4490c7447cbc7a129987a382fc56d04df0d09432b5811027d395e80b5052b8. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZAPG1774086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b58a402e9f2b47f72433e6c3385eb2d25bdca01f65b62c1b2245ac5232d9a30. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:27:10Z), 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/QZAPG1774087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce60ae47a6d4969b01f79e12ed49dc5921a7b2511fbc96b342894601b81259d7. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:54:47Z), 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/QZAPG1774088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb66ac55cfa95d50695cf794f0bfaa5b4b5a46f7bc91aea683d5b5915f693fb8. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QM4DW1888029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa26e20d3b3500b27a6136d8001a09aeb59ddf173d4de637e2766b4ab7a57506. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZDA81822826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3d26ee9b3ab1006de6287ecf0781fed844a95f62c6b9aedc7fcbf74388b7bd. 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/QZDA81987166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e1aa995be4ec9e24d9d722dc2bc02a8cc18414ef4d3d209765f279efd01e20. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZHN61905416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed9730c73fef6e80ff5ad44ccab0cfe3b1a811bc1d73e00f4661950d750acac. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZK6M1920429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022ab435130f5be7d5d457f0ca97e22c4255d07a9adc54fd799a33e95a3deb36. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZNWT2039918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fc1a5d9f3d2489303bbdfd4004f41dad0417869c85833d04154f835a751e9d. 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/QZCE61848845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe006a3322ee3eb09be5f740fd780ce0cb09c71e97cecf9c0349f967577ed560b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:02:18Z), 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/QZES52308424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd197695a9143864e26617d3e9103cc625e23c33ed551dc92b6737adcf85fc5e9. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:48Z), 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/QZTAT2326444.
Himno Deportivo Universitario (Versión Guitarra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b4d91a5384a4c5663dc3bb3e25830acfe60cf45604f391eab14868457412d9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFL2332963.