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 0xe361effeca158d55a69daa4a3b3621e66d284b6d17bf2319403b88543c1898c9. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2106911-078a-43fa-a6d2-2978d7794226.json and https://artists.proofprofile.net/proofs/artist/d2106911-078a-43fa-a6d2-2978d7794226.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 0x6f94ece8c9e4088843d23727eab3dc4e0fc289462d6d9ed85d01b9412644c210. 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/QZFYX2058539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d05ea40b1283c94613c2f852377640b182b9f36c7e0b9e1ca2b099be6f970f1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:43:29Z), 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/QZFYX2058541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6443d611d9884d33ed01340b0646fef56f3b8cf7b462b073c9dc2d25f4f5525. 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/QZMEN2376807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080b305b4babe61f8864a728b0eba6146f400a778d2d13d35c9edb1c81eaf8a1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:45:38Z), 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/QZWFG2314148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3e29d4dcb8854c585269050ae038851b6593eba1979aef45c6a2f661fc5fcf. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:37:15Z), 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/QZWFG2314149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ceddbce8e5a72e80aff204070d3e3848e85fab11d2292bc838baa1e4212513. 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/QZWFG2314150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93757c4b25590817e003c134e780e640732fcc0692d01a1ec87bac7277daff37. 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/QZTB92351479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcf86f3e9ce8f08e1592c0f33ffc8eb929b75eadb9d2e3c23391ce45583c22a. 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/USL4Q2485814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d5c8f580795d7db0531a227870fd25d1514ec3257b2e15bc4bb01a95250130. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:00Z), 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/USL4Q2485815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a27e957ba3683de492f4a94aae73999f089dcf9e0de6e28258458a1d8dcae36. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USL4Q2485816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd7d4ce2cf39dba9932b9607cbdff04acef4a0c186e46be12cfcd321d0349da. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USL4Q2485817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2a61c90ae4596c6c305c11e84e3b832c482513845d4f80e6edeadeedf8e48e. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZPLR2536500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb427e8f3101b2707ccbd68f03542ef77a76820633dac80a1d4b30090689f4e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZPLR2536501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16db8b8d4612a92d59e9c24c206cc49b84b8446a37ca914fc63cc4833942c59. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPLR2536502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62245b0cebf2ee3dd42aa1bc09e215d8a69944b2bb4af6f9126a4a412facd066. 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/QZPLR2536503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4272307dfcee19d0dd5e9591652e2e903c791b2107cfc29c82763a0ea5cf3a. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZPLR2536504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a8187646211662b8b0b4feb2fa8100b8cbf384ec1e118d2098c914c55d92ae. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:00:38Z), 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/QZPLR2536505.