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 0xfe2d2226908efe277af130d73bf7d1fb03b68869f4df3257a4c72e301cfd9059. 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/cfef96ea-1ed4-4b04-bbff-4416f3d52d36.json and https://artists.proofprofile.net/proofs/artist/cfef96ea-1ed4-4b04-bbff-4416f3d52d36.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 0x71dba024ea2b27c2e49acb69f469d569409f63b8a84aa2c3b08512abd3441a23. 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/MXF160102055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417fc1a533b3b502e6e6b3eee215901baa149cf0b86903e850138b1436ffa5d5. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:50:18Z), 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/MXF160102045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e924241661d205a1bccf95721ac3b24eaceb945145b824cc4fabe737c7ba84. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/MXF160102047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce534b18297f8e6364b1ce8c604c1f2553ca6f732228e393c49c7f0a356e6bae. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:29Z), 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/MXF160102054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0fe311e055f8c6550ac8ad75181e28b574344649f20597c9531b996bf6db9b. 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/MXF160102050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a21f60c72c2d714faf7ddf14c34bf70e60643472465d878dca06c06ca03c3fa. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/MXF160102048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1cedefa0c0417e2fa9ce9b502486498484bd061f1388769d00339d92946fac. 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/MXF160102053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a21f60c72c2d714faf7ddf14c34bf70e60643472465d878dca06c06ca03c3fa. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/MXF160102048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1cedefa0c0417e2fa9ce9b502486498484bd061f1388769d00339d92946fac. 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/MXF160102053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1312e7364bc2d609ce73fb4ee081f2b1a7b0a4259e5f0d16039042760087b521. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/MXF161300193.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b56b4fa22d3d1462037dee9f4ce25b5c5861223487a7a1b224feb1f6e03c4e. 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/MXF160102059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ae7740937899d561b0c4f92fab2c7b42d0892cb81ee0d72c0e5a33dcb9ed6e. 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/MXF161300197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb083aea73beb40402f037df007032d2ffb54dd5df91cbc3e5f2b9e184e5940a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MXF160207255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dba024ea2b27c2e49acb69f469d569409f63b8a84aa2c3b08512abd3441a23. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MXF160102055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc6abf99088f7565ade41a970c1d04f0815e2c8b864df4fe5d0e451a21b8849. 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/MXF160102058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c952f0b609f234f80ad94ee80c0e771cdc72813f59a35ba1f4891d3b1ad652. 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/MXF161300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1cedefa0c0417e2fa9ce9b502486498484bd061f1388769d00339d92946fac. 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/MXF160102053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184f488f66c8dc24630e68ab66fb436c7533805dafaf6676fdefc50f0ac43877. 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/MXF160102057.