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 0x6aee3c5914482aa49e3c4fef39507dde4621d588ab23ef8208bed0f5c24471d8. 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/5a1b7ca0-a97e-4af4-bc4a-0a9caea5a751.json and https://artists.proofprofile.net/proofs/artist/5a1b7ca0-a97e-4af4-bc4a-0a9caea5a751.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Foxtrot Freak (Something In The Atmosphere)
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 0xb10a1d1a7e3b3cc3108ae6fe35cdaa8d819882ce4f1949b4a10a6a7857fca881. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USA2B1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bd435e1cba9a5beeb391e26737b1d99e7bcd4243e6743d9acef0550425fd0a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USA2B1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5366875345d7ff7c8bd4bc8b77a19a3f2336ca4748a2ec886479c849157daa. 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/USA2B1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce9a578936bd2ccc3bf8c4157f6db94aa104308022cbd4da5b1bebd64c0eec7. 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/USA2B1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91129297458a75f942bb51f0a998a13bcf0357c858c7850a182b38053b56f98. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USA2B1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227b88ceebcb6cac03c5b5f394905d1182f16cefbd6131de85df34855c32c7f8. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USA2B1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b770fa1361111014a1aeaa256fd33ee15dd5a5d45393aa09676021b6bec49d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USA2B1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa263bf8f3d4cb7995cf0e69493e64096e65dd40a4a8bea18db2de5aaef75e169. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USEP41612001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf749ef0831df8ad0667440b7b785f8421331fa6345203c27d1beb6668c341550. 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/USEP41612003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38a218b7437ef2e2735860c8018f2533df0985a042d3ea400d6ae77cd5f5346. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USEP41612004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd530283002858a425f0168aaa7cd2f2fed3ca4ee1172e1f4c1ce8a54cc80a406. 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/USEP41612005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23512b726e3f4dcf42ad72830334cf92128e5088ea262d534e4f50c058572bd9. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USEP41612006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3929f92b526d3b1af875727c6ed7cfb86798f964c4147eab7bc2c14af0fef2. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/USEP41612008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176083b7f823c949b2f92b563f6cb7814bda345d558a951ec0193db650e1e25c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USEP41612009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6309db5c7a41299e18ceb66097f310340f4ce84701f4ef357ac16e4c83ee49d. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/USEP41612010.