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 0x7caa631830fb844bef720fb5d25a740aa13183191ac6a9d5d772a1535370752d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e35477f-d70b-4552-acb3-3063a736536a.json and https://artists.proofprofile.net/proofs/artist/7e35477f-d70b-4552-acb3-3063a736536a.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 0x62e9fce793f979c18dde106841c89dc0ca59d65faea0a9a039de7119084c23e8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCABF1236610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3541a251acd2dfdeacc4361a7963a9209457eaf3296365eec5c23ea77faaf44a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCABF1236615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5214b23dbc6fcd9e0e41111436f8662c24b0a7daa086a36a16f07e7950a4597a. 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/TCABF1236616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04561675edb93d37ddaf0af356d7aea06e2ec7798f47569fb1710fa3fdd37c97. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCACU1601823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004d180ae100aa27e55d946d05b4f0da6a2ee68cb84a664a2ad51038e996ae25. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCACU1601824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b998a46dff74038aa9cf4538177313aaabf3c7f1eea69a3937cc80247bfbdb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCACU1601825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b7f22b37d7ffaa087031158b7139474669567d0481c18b59dbc8d44ec846b1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCACU1601826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2c9805a52459b1f18b8a42561863ea0e05559b00695e900c2a4df9785ae2e5. 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/TCACU1601827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4e3d3098bd38aee625c54f3488a50cea6cc870b598c2ccfa8d4f00e00223c2. 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/TCACU1601828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fee34743c5f2b1daab671d8cd542616c42505a63f957f445905ef9d1b7a586b. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCACU1601830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4150cea13ce42c392fc7a72e4ed7061275603446c8f2dbccc2550ec1613aaf. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCACU1601832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166cf74f40a494379a641277ff7c5b47916351a2b52c011383e91fbefc320117. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCADX1892714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6407ab0ac71b88d78a1b2dddecdd5e5b355cfe85f42feed35b6afaef1b678d4e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCADX1892717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ddb9c5d68b1294fe0369924e1af4fd12fa1f4d4191f5f6543a8aacc1a09868. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCADX1892719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3197c7bda5c4426e9aa89927293091981a588f131423443e6dc879d54b511c83. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCADX1892721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521b16c35f3f8c695c68c5236df790f960a8e52fb16a6987a15ea39dbc571cef. 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/TCADX1892722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d37085dab022e2e0445d68cc9165d18028b418274628b77bbb8f645e696bb4. 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/TCADX1892725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9094a907164120cf6fb97b573c2dcfeb12c8a8906aa652674d475f7f3f56258. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCADX1892727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a707df773a7869aca674080d1ba8cae49eeffd2d6a59fee99a09243f653193e. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/TCADX1892729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13533373bd3431766df15bd0db031e0b23edfac5ba1fd7ce59f688bb9cd925d. 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/TCADX1892731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b27f362185b25d6cd56c4945da3eb9b34c208d293145e546ce9532a97e2295. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCADX1892733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd856be09b7745bc70ab3979405b0bfca2e75e9bf3edc395fc488435ade2db2fe. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCADX1892737.