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 0xf8aa7864dd332182fdda0436e22a8f5bac9c59b65e01a7a76f704bd9e0a11143. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebd860cb-5fa8-4a85-a013-913521475f86.json and https://artists.proofprofile.net/proofs/artist/ebd860cb-5fa8-4a85-a013-913521475f86.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 0x279013f5d27766eb8af0b7ee977a34504c43c05a28f800a4d394bf4c7a040287. 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/US92U1904455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85e1688d510c1d34a78bf0b07fc0c51dfd636724ff5244e2eae0915077f5e05. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/US92U1904454.
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 0x8784e9d75388fce27e151ee2bf7478852932823c7be1315973334f08d59dffcc. 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/USY871500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafe3f9de3ccb1d30cdac1489f46a7128e96513079b39e97e8eb525db97a9e26. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USY871500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422326c7e2c48c0652c1a945789a22181aa0293d0a878eddaf95ae58177458d4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USY871500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7547dd1ee1d1824584434d8d6212f51cf5d5cfb0ec3afd88192e630a61d9d5. 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/USY871400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d22f78ff0365ece4abbf23a9926e380aa7a83b72b379d8567b41e63018ce852. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USY871400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16408bc56b7449fa223369470c4526732170ca6266eba36aebc605372e2142a2. 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/USY871400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4166c24337491caea9e9a4ec35a3f05285696377e5e148fd5231e29407433e0e. 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/USY871400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49b7eb9e80aa21c0ceb972f195fe117d29e123f2b89c863e57eaaddc9ff34e2. 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/USY871400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756de49fb1123bc9f70d31e2aadb7e87c145b0a9749f5173d2ced34c44656ef6. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USY871400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1336b1cd4c76742e5383601bfaa11ee5a40955b9c06f32afd2df33ce4671c55. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USY871400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0646bf724e44991f9ef51cc1b2a514c35f2dad42ecb2e27fcf07f08f177c24. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USY871400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f51cf144199c05c4065818212168d2ff45905a2420d5eb326a13f2186cea86d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USY871400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729a3d3b3f0f891fee864472ed32940c41265421da08ed669fec8dc8b2af7bc7. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USY871400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876c72c30df91d3f7fcca612166aadbf28a04e6e0f542844d6f2535adba29263. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USY871400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74667749340f58ce995af624cb29152eb74456e1801f84bb387288a5060df528. 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/USY870700118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a83709092f773a7dd721287e15c316ddfd572e8fe8dccd57bc4a25039edd99d. 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/USY870700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdd17dd45cb1f927f0aff16ab63b65a460e871d3b3e232f79961fcaad8c5517. 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/USY870700121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547e45063d28382066d22580cfc5764dce61656e6c6a8fbbde8b21db7efe0fec. 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/USY870700122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd965bd7be66fb1654f4aaf512e3c647d1e2f7e2472cc69a5538b08f65deed47a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USY870700123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7e08b0eff924d04ee4ce5da7d070176335734cb29e48ec5a7fd9bd4b7fddd4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USY870700117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990009ff62a9b4c85d1d9012895bd1d79c7d8dd5b0b2f17ee8d921b37766bbb1. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USY870700119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fcd4d7c8647e7f6a8befd95629738aec40705d2ac162a437a83431060d4394. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USY870700124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4cb855dfdf2fee672405134055b385c81e20f739c0f9d25d8556c01bb5adfe. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USY870700126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c3533ab52cd0f89de9f2ccbbaa6940ba90399c57fcd40e3dd4f4746b004d03. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USY870700127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80791f7550343d573bb3717cc43dad77748f6990379b009da22bad1303109d18. 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/USY871100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b7873cd8ddd1af0d531bb0f2226b214de745bbaf9d8dde047e5dcd888520a1. 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/USY871100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae48d758fdf8e2ec907998ae7d34d630b62352f32fafb89e772292829646571b. 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/USY871100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138dc53b147a482dfea04330e3fbc097fe7db5f4044898ecbd2281eab11e6e50. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USY871100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df03c1f7d33e7689b60450ae455cd744301a5d4d89db134d0f344e8b4975fc3. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USY871100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f8bf26ff52f93dea4d6e071cf97f4102982408d53b9e8d333b4b35f15bfc34. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES7710602304.