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 0x7e9f384e9f59f59b2f7d728e401356887cedc1029775e7490de256fadb7302d8. 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/8c55f27b-d0c6-4d9f-b57d-79e81cd9d577.json and https://artists.proofprofile.net/proofs/artist/8c55f27b-d0c6-4d9f-b57d-79e81cd9d577.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 0x866789dfa4a90f006ec6f536123ef455f18d2407caab3d3869defa8ffb04f6b2. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/CH6541776835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9b4c99413a257bf626798a21f5117ceabcbf0e5bb4349ca2bc9d35c2264169. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CH6541776833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3f6de4700dd5b95d79be69335397a4a9ba67d62c3e4c2e4fe13015b0a14942. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:27:06Z), 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/CH6540881113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f81e924ea74d69836d898ab842ba2774330db3ace7681237db0d5b4d5450c50. 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/CH6540881114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c3aaf713f637c9c5c3014a7f4bddc860db0401cf2bb179331e19cbebeef9ee. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/CH6540881115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1d3c014a756713d5471102ead29b8c70a63930f00b5d415c93780176af5b4f. 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/CH6540881116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9215631e36afa85a5bd0b7835827b2228bdd36708bd033c17c0da069e6673b0. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/CH6540881122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32222fdb8ef3055404bb36544a2bfcbed2b26e7f4a07d80845105c1617681d9b. 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/CH6540882169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71f82895f4b53eb87062b052d1a9b32573a2defe9525d75bf2b456c6b4083b8. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CH6540882171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562d9890c147c57763ac33f9799d31026248cd2513d5ab0ecec541e731c2a23f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:21:54Z), 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/CH6542032681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0aef170aed1ea013f8f811fb8c26f00ad8ae0cd23a03b24493ae4dec13e5f0f. 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/CH6542032680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74096540fd82cbe0e0b13decbc674cf5b1eeafea90cef4be5af06d5b3a9ddbce. 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/DEYX82132320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1432b19f125cf38c32d38c24230a64b496fc1e74c9d95a9a329f02c5238d7d. 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/DEYX82132323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5750cf128286a6a81f0a9cc25f359e2cce8a08cce53163765682389c72f25943. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEYX82132317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc602cb0e033d9ef1b1c108b702ca4c0a2357c6b8127f02909a49a4344fddc74. 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/DEYX82132321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058d1d287be6341acf3ac12b15acde0a0e6140cbc9692861c640e6f0bcccbfae. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:47:50Z), 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/DEYX82132322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352cd21f8db5bed181919a62936ca32723b5239dc6f25b4c37258dc19f12cd18. 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/DEYX82132310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497d1302ea15089b47ddc8b316c9d573b3d6ab4716136479e431fda14f3cfcfa. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/DEYX82132314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e93317b268801fdabea56ca1bf9d4f4884eed70349e96442c65d51751a3802. 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/CH6542046660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0b1c3808434c37a94700aed5f350091ab877727d069a340e6e1bcbf0ff6ada. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEYX82203796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f0b322f518c9868050f195102b95d29a1616ce5a37700db06ba9db7d8328d3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEYX82203800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43b43fd3df1a831065edb1832bc01df9cefcdca545394ef15d7a1f2be8fc7e8. 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/DEYX82203802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21402f68312b3ca370235143f69169968901024d852367981815872394d240f5. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:52Z), 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/DEYX82203799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c059f46d075f1ffdf9cca1a1a04bda58c775503ffe5163639d25aff2ce9bfb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:34Z), 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/DEYX82203801.