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 0x62a194c841c07e8994e3d2b61a52998e696d4a646d9f4959eee584d5fa222b21. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76c8e4db-63f9-43ab-86fa-89e139ef18e7.json and https://artists.proofprofile.net/proofs/artist/76c8e4db-63f9-43ab-86fa-89e139ef18e7.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 0x8644e7f50fd617002ea57689fd2303f665788b85046d6cdb90468f890f5c5e26. 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/CAZ700700121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da54f99c36982c8ce38af1dc1a0af86ad0848b4e7cdd11f13dcd91e5698cdd1. 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/CAZ700700122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7846f7e3ce82e930e1e5992e310ec98a88d089413a134d0f7de474f0058b113e. 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/CAZ700700125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb601cd8c253547cae413a9badeebc4899aefc7c218df6a4cabfc8a1c0f4020. 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/CAZ700700128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd158b5a573f8f1cfb1d7e33d4407b2e1ae900591f6e528eb1ba3689558404d. 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/CAZ700700132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2ec9bbebb77544d50d6291f26ed909a51f0eb68d9919a2b4620baf0a580790. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAZ700700134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e391ddb87a21e9ef287c874ff04224533632e9de7d863f1240c044dc59c5918. 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/CAZ700700136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e68a446022bb0698986e8af34cb2903937053caa79353b28ef595d378234cc2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAZ700700142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5b12c0c693ea9f1fb69a9ab154c3ab0669b07901c236d1d863b55b9a28ed33. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAZ700700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a000d375161da7b8e413bf78353192742562191cd7c551fa9fe3a1a9538bc21. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CAZ700700123.
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
Compilation Summer Dance Commercial House Songs Top Hits New Best Music 2013 / 2014 (Radio Cut Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e5a0bbcfd129d2b0492555ea6518b91c630c2c4c63a4891c07982d22f2f998. 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/ITBD61300969.
Summer 2015 Dance Commercial House Songs Top Hits New Best Music (Radio Edit Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e5a0bbcfd129d2b0492555ea6518b91c630c2c4c63a4891c07982d22f2f998. 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/ITBD61300969.
Compilation Summer Dance Commercial House 2016 - 2017 (Songs Top Hits New Best Music) [Radio Cut Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73be86a0db91d010a7cd74abeb7fe14de30d979a38d42273d411806e44539db1. 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/IL1030700451.
Latin House Summer 2015 / 2016 Greatest Hits Top Songs (Commercial Dance Compilation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e5a0bbcfd129d2b0492555ea6518b91c630c2c4c63a4891c07982d22f2f998. 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/ITBD61300969.