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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ffb825ccb5d9b173e384592c339a328299e65ff4c7ee2a49a2603039130224. 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/e84d0ba4-aafd-421e-af64-eb67af0cfbd1.json and https://artists.proofprofile.net/proofs/artist/e84d0ba4-aafd-421e-af64-eb67af0cfbd1.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275f8495f9f037227e6acc63cc460fae60f8e19b8b5f866bbc88a8e59eb5e2d9. 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/FRX202024998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a411aeabac91e214feda9d412d4ebae9dcc4d65ee709f183e36df58d2194d2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FR2X42028665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef5b3ad0ab0b1ecf08e35c5cd753d78dc846f5e3e28c80820d61c3fc4e9c6de. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRX202119604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526fc8ae4890171b8ffa3fa2416fd662383c7d92b1c8bcac479cc7fd46852671. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FRX202119605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8245f964b1d3a142d4347a1e84c5f2d5868348997fb73f8ed5a91ff8ea67b50d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FR59R2165733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bafb1ee9a72b20ba1bebd2c225867e173c6302077e29a0aa26f296142a72f2. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/FRX202119606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ece0d0f0e10881e42775a898cc4d024e65a483f0eb8c53a2d0910900737fe71. 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/FRX281942420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0cf6b896d2d3c3a33444cec8adaee5b9e48e55d3f6fbf83da109d4421c9be2. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FRX202119603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa123e810bdcc67163c59d8998c1880fa8ae2370013e08da95f714c919bccb27. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IL1042302102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0958a71c94db897258f713b58f37e48cf64e8ebf82d65f548ea2a5263f52055d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/IL1042302104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5bf431657e5589c2f82d22dc1e47bab85f4e3b8e9628e4284ca99ec9a9029a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:28:42Z), 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/IL1042302105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccd862570c1c90b1ad81d256a93805897c920f48afe9b27dc12518af4a2d6d5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/IL1042302106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf706d7ea1b45f8ba4b99c0440b7d59f39b3925ff213e0431046e95eff2eba23b. 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/IL1042302107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1415676ceedf2f85f24608aec92df588f1e1f7ffa6697c7840a1ea9f5a83216d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL6192400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51c1dde73e5fe904edf014b68d331458f47570f36c9d7b8558ce0da377b365d. 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/IL6192500470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89339b6ed423ecf37a57163ae3f8203e6021cc957c0855d4910549a338d67e36. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/IL6192500472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6c5238a8750da898f523a4ed43c379f1789181bcd0a028b767d89ea9d1c058. 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/IL6192500471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e44997bc25de847ed52b13e4c1b413b76c83c48d3dd8188eec274c6443887fd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IL6192500736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51c1dde73e5fe904edf014b68d331458f47570f36c9d7b8558ce0da377b365d. 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/IL6192500470.