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 0xfcedbff1994361485a4f49478e1386a194167fce03eec1b46e5cc228cba08b9a. 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/f1f84a26-d75b-49e8-aeca-9001ec6db8d6.json and https://artists.proofprofile.net/proofs/artist/f1f84a26-d75b-49e8-aeca-9001ec6db8d6.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 0x318b43392a5be703065eb45778fa991da31777a50816abeb6a7293c9176d4f91. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBSMU8848374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6eede53bd4e40c68e970510d1de31cfc07c1a29c403344b113bb2552e753d4e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/GBSMU8848375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d71ba389f7496d0a260627c38c95a0235752c5c7e9d4ec154a3b347a93deea. 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/GBSMU8848376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb520915a664c1d83db1e66c4161465c6d8ddd36562ca1cc150a6ff05d38ff30. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBSMU8848378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05bb12cb183d9737407c3af3675aa7f2196d9fecd3d955902e012413c0bc989. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBSMU8848379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216f694bb908ae4f070a8b5b659d2d5bbe684ad56b510446f08eaafcac2f22c3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU8848380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb211948bc720f236faceaa513ce155245b4ad70d46a3e1c4a31ac1844890f54f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBSMU8848381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542f3b4adb5c19536cb4d7868e8327c49bdacc9e2ec5a60ae61bdad02308df3d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBSMU8848382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dc947f011800b0cc6938f920d1197343551e59465f1a5a611182f6f3cd7062. 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/GBSMU8848383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172362f4ab5ad3f0978d1655f8ffecbf14bee6f5e61d6b1204d57e1101e29499. 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/GBSMU8848385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e10c1eb08546731a2a42fb0752aa4226346150a86f917301b8a46ba2267649. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSMU8848386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9af34077f166eb8a7e215ae71ca098f3daad29fd34119a24ae0ebbe0ccf243. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBSMU8848387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fc428d74a69535d4cf964a227b80fe3a264b00a0716fe9314a6272c1fd9848. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/GBSMU8848418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa062da850d875aefbf32068742e0b292f85ec181637a6292639922227f33ee57. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSMU8848419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e467cf0d5652ebc819d461aa189c57a6b0dc2622e356717aaa14e8188f02cf5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBSMU8849248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1378a464fdeca0403e6765b79e2cb8a59a4c3a1b267c8649d9f6ad0c1225d03d. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GBSMU8849249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d07d4e5d526c879156154edb80fa4a58994340bc1833fd6cf32dabc079c9ff. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSMU8849250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c036604044567454bf02d9bb0938f22d9b5cb947118fbc86bcd9884069f7a3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GX5MY2274548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb592fca4af571e89bd2da662b8d95147dba772a56305c291780e305e42058c8. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/GBSMU8942983.