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 0x5c810234153f0f2a60b5fc562a64587e09ba76de8c1a746c2d712b730e1da4ba. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a46386c7-0799-408b-8e9f-494a541e9c33.json and https://artists.proofprofile.net/proofs/artist/a46386c7-0799-408b-8e9f-494a541e9c33.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 0x68005e7f69ea9726fa3fa425394abf1d5d335eec2175686f761b7724adaaa8de. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZK6H2233599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18c2b6c748565611846364117dc4f75e37195a8acd5566d06e16f435fda5363. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZNWQ2252356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7494af9d6cf9c643a6af92257bd71734e758dbbae2c544190a3c03438f54a1. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:04:52Z), 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/QZFYZ2325519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a04471d435a06fdfddcf3840c8c371b86ff5cc30159cb2f47f9c8b75018cbb9. 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/QZFZ72362550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dca3293cee0183b8c2ef39f05f42bda42364545ba6e73425ba97ae394bfb5ba. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:08:18Z), 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/QZES62311190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0386909f59d575689a45be46a7c91a41cbfd9f2203fe01aec5bd82c8cab83f1. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAHD2340892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cf7655d3e10b5b94b3a571429d231b78754d1aa19c19e97b49d31c0720375e. 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/INW262318736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44db5b70cf31643025fa3d9b5ed3205b17c2623408848c3ee6f68257acce26cf. 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/US38Y2500498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e91cf103ef63441f93b010263d29b3b2edbfccd1f27ae215afe81b1b8785e3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:13Z), 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/US38Y2517821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5a8118f9199bee14547b6d8c7a4cc030455588135248ca551abed90c3d44e8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US38Y2529179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab77fd22f95e373e104c804b565fa587cf87f1fcd540dfc13eca32046d827d0. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:38:22Z), 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/US38Y2539164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3077eeb98ba16660b6596f4117722b14d797ee4f03a6ed77d25b1af43652fbb7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/US38Y2539165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62f86cef6137a15d456537abb49734c704c211c5dca0a922455de25a5ce3661. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:47:43Z), 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/US38Y2508319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdef7e171715c37aaa0e7edaace22c6a8c7f6ae8cd24c8538af48b708b8e092. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/US38Y2539166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429fc3285874644329d7763fe535115199b8ca862323937e7cb7179da2592aa4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US38Y2539167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7de089f55a765df94534c12b742f811082971bc6493ff0fc23e00178715c04. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:50:25Z), 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/US38Y2435182.