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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673151abbe2caeb2eb98f6842763fab178c8a8673079eada24ee1c0947d2b033. 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/4cfc50f7-aa3f-4ffb-87d4-282402ce6d94.json and https://artists.proofprofile.net/proofs/artist/4cfc50f7-aa3f-4ffb-87d4-282402ce6d94.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66abdb669aa43355cc2a52f7e0ce49173174a3958edfad8490aa9dde6907e91c. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/DEHK90911901.
Back to the Sunshine - Monday 2 Friday vs. MB Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ecd626efe699bb0181097155d82c484a1c78edd7862fbe5ffaa9b2f614c5ae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEHK91135501.
Let's Get Mad - Monday 2 Friday vs. MB Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44114b9dbbb1b2bba675df0c168fcabaf6c152c79bed9c548ee78416aa8212f6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEHK91256403.
Let's Get Mad - Monday 2 Friday vs. MB Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b9f6b10bc966d5e128de0b90413009da8e12f13ccbd6caf8cf976232afe883. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEHK91256406.
Until the End - Monday 2 Friday Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f6585ae7125f711aa5180a581ba88eee4b77dc507c0189b5105f963f08247d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEHK91016703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300a1d47c7a298ea084d58a974b68631a39c1052710b71830c53ee648b3ca414. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEHK91016707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9abd93da3f2029095f5a6f0f9e4bde3388f468277cb54efe6d107e0e2a4f9d. 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/DEHK90908901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdad04e3b3cc9ab0353e0d05ad9c70216583272b2a96e121b296968bcef8c97. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEHK90908908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9abd93da3f2029095f5a6f0f9e4bde3388f468277cb54efe6d107e0e2a4f9d. 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/DEHK90908901.
Brighter Day - Monday 2 Friday Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3894bb656a26eddedc6a9fc3bda41e288f6422e078ee25003096d638a348d909. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/DEHK90908203.