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 0x1c6f2efce224f92bcdb221830e0db96744774afeaa2f7f8fb25b0b17062db9b6. 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/d9e4184d-42ad-49be-a585-b311bed722f6.json and https://artists.proofprofile.net/proofs/artist/d9e4184d-42ad-49be-a585-b311bed722f6.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 0xc64e23dc4fc86ea3473a280557d0d643b9b2366b3df84185985e35a8cedbdc35. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLD321800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a1aa2e3459cc927986e1c0fd6f1397972aed0618b81d51f2f2f8b58bcd5fbe. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/NLD321800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4f326e0e44d256ffe2f79c23b0cd345e953c2af90a529d7054793c5105cfe3. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:15:43Z), 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/NLD321800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7be49e3eb55036c3ff7a0ae7ce3e75f6f42a155c589216a50f75b023e465c7. 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/NLD321800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115f496bb377735f8ae02491e6ffcf955d15fcf3b8e15ad5b4ab53422697040e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLD321800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0669be0a645e85172cff3dec3c49b6470b82d978bbb1c3afb17b5e8e4a138bf6. 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/NLD321800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d794d02a45c51cd836b8d4fa5fe5179f675043db937909fbfafc323945ecb99. 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/NLD321900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c01a00d9a1e257999ba34077eefca4fed4c5efafc9ab96fbee4129b28e6b576. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:46Z), 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/NLD321900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce73138ccb0903580c230c570e97105a108a6614a927dac8e9627a8c830495b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/NLD321900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf11d91bc894db3f8783ca59b64efa66beec04c465cc9317c2b9a2ef9db459e. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/NLD321900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb412e43fc5038654418958cb572f1863d885808d1e7cf4fbec4da510694c812a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/NLD321900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6555ad045eaa539d4083d6cb2f4bedade50933972caee636c9f43188827f9475. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLD321900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf964524888711668d8963764289c80b9b384cf782aad516c34fbc604b1da8983. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/NLD321900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549b5b518af786cbc224544220df1fe5eb7657f605ad1c539195eb90453092b4. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/NLD321900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46a7b54b561c3e4ac91c067a1bb28856e736afc17c803ec8b82b86b3721aadc. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/NLD321900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3437cb39dbb529389a0e4fac5c11090f0eb3d313665a0fa6c330208dcacee421. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLD321900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6d916592e8a182b0477273817d9cbcd207a8aac0acf05561947a0436c448e4. 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/NLD321900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea51b0403eb9dfcfe309d9c8f52da8c76f6cd952f075221b5e1954ecf61da37. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:25:19Z), 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/NLD321900037.