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 0x78f10712e4194a464cbc94a23b2a96e1a3a617c9163d23480834ccc857f6b6f8. 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/4ce48044-74da-48ec-b642-2a6b3a197f03.json and https://artists.proofprofile.net/proofs/artist/4ce48044-74da-48ec-b642-2a6b3a197f03.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 0x8189ef572f2de3989cfa851ca1e41e56564ba6bd1c557dbcef07c9a36175b9b2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:38:25Z), 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/USDY42221600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ebafc4a716a9ec8e05a22c9a1c7eb06d010c1f237e39416b0579d99ef78d8a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USDY42221603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca46c8a41133d586263018d764638a70277d8a7f6fe17aa9775625c2de178df. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USDY42221612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e81065ae3f77c8dfff48e1da9d95881e2995c646bec3bc53edf42750cc75915. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FR9W12466221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150fbf30c2900b607612d210e614458dda4836594707553a509edad90c27a1bf. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/FR9W12466222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb2b7063129ed189802103698ddb5ed206d62f27718fbf80356589d188318e5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR9W12466225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f711694850863a17b7397df49eb9fa25462db4aa965d0568bb1d69da773d527. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR9W12466226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7715100540f8527d3548703d826b5d33a0ce665515ec3947126a68138153acd3. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:36:15Z), 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/FR9W12466227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9283337b217877d655169d085071ca2f0466beea490b0a6b8ce5af358c0fd0c. 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/FR9W12466228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06f86dac2044afcd0f54c3b6d5ee841f499a366fa5debbf5917f3f51ff3de1b. 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/FR9W12466229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1ed7d8c626142b63690a3936444f6cd7cd52c7e6620b8158f935f32e31d1dd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR9W12466230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da43f732fb3246acfce27070b6d0fd5c1ec6e0bdbd58bac68fd357dde4564e2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR9W12466231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8d4c4fadf2f3d1040fd7adb49e5d61a126c52019fcd9502379d46ffaf19f9d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR9W12466232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819534a0ffb6e6be556580a27530f363bfb9251f2a7fc2dfbddda2c7ff0bfaf2. 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/FR9W12466233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6384c15579ce6e50942fad3387cc61d277c7fdc14b38edb10bd03059b24b9b93. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR9W12466234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ebafc4a716a9ec8e05a22c9a1c7eb06d010c1f237e39416b0579d99ef78d8a. 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/USDY42221603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc293a7441eb14ed00ad85c4813eabae9dffcb36de991fcc9f431c1e6a08779. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QMFME2336251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084c2c36bb356057cb54726c3870a78c40758a7279c37d63490a1d084161a51a. 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/ES5232012215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfd246691353cbeac60224c0a6b1fadfdecac6e288ae1763c1041ca503dfc68. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QM4TX2335789.
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