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 0x4483a985e7d7d893d0a806eac62b7f022798d3a611b8d55e1864989f22e15107. 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/36edf2b9-8cf3-4fd6-ac72-e63757d1ab6e.json and https://artists.proofprofile.net/proofs/artist/36edf2b9-8cf3-4fd6-ac72-e63757d1ab6e.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 0x4b8103397549e9fabbef2bd0a934c19f606d669cd6b983dbbb8da6872a1a49f2. 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/DEQR71700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277f0d336d9544b8f8accbdbaffa727b779ebbc9059918e029fb6e4f22f18fc7. 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/DEQR71800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7b2ef32717e17fcd044211cb389fac5b28ffd0b9b3768dca7a2ffbb3333826. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:45:04Z), 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/DELV42400658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd445fe3b177156538d05422a7b24918c03181585c8d60bc4d9966f1e586aa6c7. 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/DELV42400657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd625137d8c2a495000fbddd313353f90ddb618dabd23579a46bf5c7e673d6580. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:48:14Z), 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/DELV42400670.
Maria 25 (Deutsche Jubiläumsversion US5)
Maria '25 (Deutsche Jubiläumsversion US5)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e9a650f9e02b72d12b978d6e2afc3fadc350faba5e8da14017d270a5dd65c3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:27:19Z), 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/DELV42400671.
Maria - Deutsche Jubiläumsversion - Dirty Pop Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05984cac72cbfdd0acd3d76357625a39bc35ce391a467ab06f933080db4dba4a. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:42:34Z), 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/DELV42500807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc79837e56759dcdfeca4dcc6fec634b36abe8bdb2c8e71c4c86d5a59dd6db8. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DELV42400653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d425a2bf8932940df1bf150a0c7bd38b8479116fbcfdfc1dace8cf56c16948. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DELV42400663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066d9b7235f812f9febfc828cb29277109f13109cad51976435894ff5ab52c2b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DELV42400664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cc2b1d8330fa839d76be1acdd182d11a90f40a3e15c740b3516a29b7687970. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DELV42400666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f804d24a33d80be3b3faa1e19f634c3f9d142e25261b06bc3abcd351b8ff168. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:49Z), 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/DELV42400667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0236a72f3553ddd37d2b897a4d8e5630ed7d069c2d55c939bb5005cdfb45b7a0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DELV42400669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd625137d8c2a495000fbddd313353f90ddb618dabd23579a46bf5c7e673d6580. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/DELV42400670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62368a19488148386771bbf5d9b7c51fb950c35641a104f1f8a04d7543d9b984. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DELV42400674.