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 0x7b00e457a50d83c83849d2073c08ed0ea66a53c0484472bb0a1bc39485e73bb2. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c9e2a5f-ac82-49a3-9918-c13fef125e85.json and https://artists.proofprofile.net/proofs/artist/8c9e2a5f-ac82-49a3-9918-c13fef125e85.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 0xeaa9335efd235b94649708316b02e213bed82d47fe0b0ed3a4ce5c36be9d631e. 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/USJ3V2106186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67675c653064e7e8d0f86291fb5d2cfb53e5714608c911976e63a4158b71ffe. 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/USJ3V2106187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2639c628ff6ee029f23460b00cc9922aa7267d420a18c9b19a3d6dff1c1a0ae0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:05Z), 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/USJ3V2106188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd616e63ade8360cea4ac8c191f7ac1b9b3aa4999ccc3c4610ed41efb85eba39. 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/USJ3V2106189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971b18f936cbab86c20339404d240efe9479d6c757c4b7986c3f37c2d38839aa. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:23:04Z), 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/USJ3V2106190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff6d3738e8eb9140077f821bdce255494a050a08958f3e2104146a0bf7f7441. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USJ3V2106191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc69c082427e60353a2e9d6fd919bab4256fc20f3e7565d6bf10b62c1b53933. 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/USJ3V2106192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181b689d50de9383c1180630a8e21caff599b520bd7f64d07c0cccf38a0b4bd2. 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/USJ3V2106193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa441a667b803737afceda0e8661fa0b6be0e8b0c834aa930329d936acc9f12e5. 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/USJ3V2107976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885ed0b493f2cc054a564ba477d1acceefee45f92c3be00dafacf26b71f40182. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:38:51Z), 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/USJ3V2107977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf099c8e6ba91e11ef50b783774ecfa2a8427e6191aed69e9a7d04a356b26e7ab. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:18:33Z), 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/USJ3V2107978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36937e2f2e16cbcc51cbbb0c6f146caadfca736a80a2c282f17f68442db5128. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USJ3V2107979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260af7b448824a35ba4968e8256c2bece65dc060789ed047807c0622123c5f76. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:13:17Z), 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/USJ3V2107980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951f6872f819f06602de0659151a3ec4856039855cae674df497df16ce7b48d5. 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/USJ3V2107981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ba01c85c465dacb68a9303cb2b02cf552722b7a43a631fa42d64859d57d384. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/USJ3V2107982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adaac0d557c861b8879880b45ef4180bd231c6da7bd88c54b2ce5bc38acb17e. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/USJ3V2107983.