thumb|Branan at The Whitewater Tavern (Little Rock, AR) New Year's Eve 2010 thumb|Branan at Rough Trade (Brooklyn, NY) February 2016 thumb|Branan at Gypsy Sally's (Washington, DC) October 2015 Cory Da
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 0xdd02b648fe8ff8619768ab9f225a41f1a651be28758fac6881592749d808382c. 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/dcde1c2f-166b-4a41-81a2-09aadd24df7a.json and https://artists.proofprofile.net/proofs/artist/dcde1c2f-166b-4a41-81a2-09aadd24df7a.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 0xee5f796725a5055fbcedf3adbc1f97c251b3c261188afde157f021f619f3d718. 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/USA590200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dacdff24f70e14bdea665db17a5e29d322d1ab68aec9d93ef007c95122d197. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:20:10Z), 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/USA590200602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe716e884034e9f1cf9a1babbf7b06d1abd4e5a59a41f33863edd72cd2bca063f. 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/USA590200612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431bb14731b745341955b77db72d764a25f6e4384972ee12374edd6f9fa3a703. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USA590600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5165b36bad4227579329e5371f9e5d8d2cad88cfed3439e01b0df3cd1fc61347. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/USA590600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d077cfc7af1d5f60175def116a8da862a954e92c34858e5a68914681aaa11e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USA361219503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fab1a7909164fcb7937618c9a1f3c156d2a82df01d727f1b6b915d95f61a433. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:19Z), 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/USA361219507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d15b152eac52860a3f2227f3e610a3029665639a7728e1afb9d78e7ba629a6. 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/USA361219513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf150902f7bbeded4f88e915573b3f5477002dc7ede81ca1cd321621451bb0a26. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USA361420901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b38bb9384d4c77dd9111f6267ac6ebf9629d443c298f76591090900c039a75c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:57:50Z), 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/USA361420902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699a8503c0a6beda1fdbc6501e1ed717bc33286232edad7c0b9ee81c47df4c5d. 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/USA361420903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10835d6fe16be00193293db99c6c1d1072697482e6d2a0a616804332c449946. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USA361420908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d6f3b52c2dbded2edc127c22c8008e7f2c6e264a31b8ce140e28db6a5b0100. 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/USA361420910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc3ca789d795ce63a548561537cf01083521188ce452533d352387e96c69132. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QM99V1505002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa059bec9cccd19db1cbc4334d16e910ca2bd4fadefa2ff014b9456608d2f3492. 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/USA361725101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd01ee2de000fdd9e9ad2e5dcaef4b4378b8d2cc731f70d476d9210e44044f69. 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/USA361725102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a2ade17d5a5ac191978c341aec5085fa3905250c7efa30266440526ee36065. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA361725104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e61e95ef603490eeeeb089dace0d4f40a0dd819dd5565fa5e1a409ff9fb902e. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:48:41Z), 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/USA361725105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad8b6102b86d6507a3c8db4cc27c8ddc9bdc88cbe2e0f52b33fd034f02f98ee. 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/USA361725106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb1e556539f0ae552d3c353bb533299f0a7bc15a7b77bdf95a435b52af5c1f9. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USA361725109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7140482bfdb80c48dd1c4d78db562b776f3f1bc4194c2b6ac560cf038027ef. 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/QM5QG2239501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7061eebd6f20368e70adb3f12cc2abf70d26cb33c88ad5bdbfd4396889b8cc34. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QM5QG2239502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27478a431f199bbecef3be16a7505a816b6a49d5a510a6ba69d7d794a37a0fa2. 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/QM5QG2239503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5ca9991f5da8090cef3107c8e24c3bde400cbd2156c23302c04d616049a404. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QM5QG2239504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa775997bfb10dec583bfcc207c53f515f6cc5e31502c5c60f9c29c0753a3fc76. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QM5QG2239506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3909e576c6833817e7f4dc05462581c42a519a0a9f2e71ea5efff10e497cac. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:36:19Z), 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/QM5QG2557401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5c4dfd725b0de1ae51f4e6e8da5e2bac21183539184e165f00926708316752. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFC2091323.