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 0x1f1775277c18647c8251ccb36231d0d056c477b6deec73edae8771b3b2dfaaae. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a0b55f2-a0c6-4b40-83dc-a2a33ede48d3.json and https://artists.proofprofile.net/proofs/artist/0a0b55f2-a0c6-4b40-83dc-a2a33ede48d3.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 0x3a79b830d68da1352f9edffebd12eb89ddb8ce44b34898031e9c32d95df2dbf2. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/JPJ901714820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf2a31fd2832ddd81480ecf849499303d5df521122fa5c30d880412397ab62a. 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/JPJ901714830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7e6f77cc57145ca15f01b8e200bd16586078edcc92e9442b981759a4efd9d7. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/JPJ901714850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36ec886d348826a7f05fb54507e196539eb3090b847dd7a3bf7ed5eedfca67a. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/JPJ901714860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d6d1f02ab68f800dc18128681b36eb43266db3f55a1ab960d19f6737d859fc. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/JPJ901714870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25aee7f5da74c13dd0a9c35a78ff8aecef626b8a7b076a7bc7deda60b437e17. 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/JPJ901810240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c8509fab7bfa2df66a4f408c8ec0876210d86ea31b6ce7c55f992ba10b75d2. 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/JPJ901908340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1596431a1bfd25f102b9c46e30a1d85cb002c5b20033baa99e8ca973343f51. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/JPJ902111390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca9fa22845f8124009db112162618ed8bcf8080ec5ea253f0cb23973053cc3e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPJ902111450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d43df52261f45e330cdd488af0fe0ae0aa26acffb1be26e2e818047c10bc0ed. 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/JPJ902300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632d0bfde93ac3cf957a0850ac6c3237bef17074ec06e117aee66c9a1b88abb9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:06:46Z), 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/JPJ902400380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a64e1884b32911a8383c087c9e695cef2b5e7516d5e6dce2b93d8cd69871f37. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:38Z), 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/JPJ902400410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74251d996c19718d432999a55ccc3c78b1ae899087e407e6473c4d62eb38992. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/JPJ902400390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb6110d6075db9cfc722ccd92cb9635fb37265d01b6799729d205ba3fa2c2c0. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:27:43Z), 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/JPJ902400400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37c2b9d86c384714b1ce3d6dca8fe0e5c8fc4d8d51be4891881a1ecef0f4fcb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPJ902403450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae952abd9ec95f9aadcefb90a5c7e9f62da201ca644840d9d9d377442a17e11. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/JPJ902403460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b91e05721a76bd9cd9c5058e999bf6f8ef77644c24c18a1fcc23e95ffc6019. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPJ902403470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae952abd9ec95f9aadcefb90a5c7e9f62da201ca644840d9d9d377442a17e11. 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/JPJ902403460.