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 0x2618a7aa7b5720f08c0baca48c2bc2b0fd9c1425523bbd013b5cb9a4abea0f63. 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/a2c079dd-7b36-4e68-ac76-79530e0d0d5c.json and https://artists.proofprofile.net/proofs/artist/a2c079dd-7b36-4e68-ac76-79530e0d0d5c.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 0xd80a9bebea65a5ceddcfc7299c4ecbc55ddaebdc29210da872635c5ced50b375. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DET751000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0ed277e69cabd0955c7c9f09ffd77573890d10961a0ffdc3b03e9c87f9a564. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DET751100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f1ff704d15b00875621e77a141946745022f70d92604ec87d99e9e5266d154. 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/FR00Y1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88171eb54ac6c41f83833c0f3fdf4f19ae8ea7e77b814c355554861d772a0d6a. 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/DEPI82204744.
Levante (Music from Space - Dimension B)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824bb04ca323401d8e9991bedf5d31e61d3b0e70c0b516c79ab926f149b09a1e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DEPI82310723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4132f12b8c350b764a864649669d023d7c5bdef3ff5b60ee3191d79cc688abde. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM6P42547557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e449a630f11519d4dbeee9007c2fb4196218d9e74aebc74267edd74fca344f. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEDL81002456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72efe9ec838f8fd96c733ce430819d6c9580c5f2865a7b995cae3b4fa67d9f0. 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/DEPI81802214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0b6338a614c996e80b1af4d69f13ec63e7dfb3ca8ea18a7a882981e3a30662. 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/NLF711909697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ef8c69a69ddbce020aec820d459cfceed529746296e828d4e748f5443f5604. 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/FR9W12235083.
Beyond Borders: Berlin (Mixed by Dave Seaman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d88c8ffa69dcfbeced29105d462cc651062464c140a6306764c3c7470322f7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLF711507174.
The Best of Crosstown Rebels 2023: The Year It All Came Together
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7f09d98e79be4acf43b040aff8865de996131f66434a140625054fcb85a97d. 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/GB7NR2329203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b27714a793496f5cae8d7dcb01cd899e11f3672756d565d370361619b56086a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBKQU2365320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08301db7cababb4bc5bf4339e81ed1aa757c126389d0e0fad50d5db5fd00566. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBTEZ1300617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3907f4344d5da979dd5abfb91ed1314c29fe5186b1ea4932d241307af91e35. 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/GBTEZ1200431.