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 0x7bf2505eb8374fcf3261edc254d59a00188df3ea23b583049a6580ab5be4e2e5. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec61efdd-d39e-4b4e-bd84-19791e61eee8.json and https://artists.proofprofile.net/proofs/artist/ec61efdd-d39e-4b4e-bd84-19791e61eee8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xa161766ae7095a067a77d3c1b0f94f47b4bcd3de72e7f6c74ab0543a903a965f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDXS1802611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9b34eb3c88043c501b82fbf28bd38c835ec5527114897eed7065322436aa9e. 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/USDXS1802612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644d67e39dacc2e86c9a669b4e27d55dfb558b2f68c29dc264e5991dcc111036. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDXS1802613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402e56c11a84a65368b8e9dac960b926d1e7c0d78d51e429db410028b7c5da05. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDXS1802614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3512f730ec257511feccf8076c02a25f3df0870fb5788d9a4fd93d27ce060de8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDXS1802615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5e9134f9d4cb58d04482a122db5be62f231e53e5f392ea0374794d4f698f06. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDXS1802616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720d06265af5a7e6ab7698a87cf0cbb98adfa52f3dc969a1912c863836ce5644. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDXS1802617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d07aed062fdd98488ba7598e7f3c411b9fbbef99ebdaf1e63b470a44fa500f. 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/USDXS1802618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7f47a16fe0f292c935d01f9176880dba51bf083808c8737ffe0598a74e29a5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDXS1802619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d06529cb49a9d52a2b03654b0f1de2424dacde2e6919b4fdce9ace14718310c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USDXS1802620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe03468c9bfc1561ac5e717edfa72f59d9a45dc1f5b4d78b38598686d12c9f10. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDXS1802621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28125e3ae0a2aa984746bb19f159fccde3224909df73c3111f884a3869bf76d7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USDXS1802623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720db099c7c4468b6ad32b793b6eb2231a0e8f5006e80f042a8ac9437bcb5bf6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDXS1802624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d66062d52132c3a2931ed039e232e65ee67f9db3b1098a3430adeca955cfee. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDXS1802625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c21a11f81dc9a06888cc9349412926680c5298a9bee744c4eb9581f0b4ec1a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDXS1802626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae5e2a0bdc7cabb77b8ed88cd0c1e1b446871f561523f0fe7f5bd29cccd9cf2. 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/USDXS1802627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14e34c576e70496a027da16bde4066eeb3c9da0e06725b46fb703326f094aa5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDXS1802628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c2192278d710b04bcf5395fbe3f9c779f676e416f3f82938f50e9d83d3d64b. 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/USDXS1802629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777781d58eada05ec5c1779dcc71cb362b35a1d0e432536f082b977519520c9b. 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/USDXS1802632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b370798013a21f8248d47d15be6bb72ccbb37bf101bf22c48fa8b16cc93410f. 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/USDXS1802634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e27600899452da9b25c1d66cfd633cf8062e4a699ee3164ec1fd21760b98aff. 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/USDXS1802635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc472a36e4ab687331d10a071b50e983b7db5c937b0d77ecb8f06b90c4cda0025. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEL1921416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9647d817e7f4725ace85f70d26b3f771ceadbba0eb45084288878ec9e07e1d80. 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/QZD7C1800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2dd30a5316c8e31d6917b04f54747b5ee49e0bc2b5e61304cc9a10fe5fe4b8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZD7C1800060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58226ea6ab3012b71eefe5e8ba4079082a49f80e84de54abf676f36c0025f5c1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTB92271030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b41dcf8eccd4fb2bc894dcee0dbac5789a739d376b1cb56e69e4b0dc175f49. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USANG2076374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b22ea843eb2fd917887b620160b18b3dffc23690ad2365cd7ecb1362214c0f4. 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/US3DF1954599.