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 0x59209c827f6fff52f7c3919a9ac0687b3c6899681dd085b9b704ba602c76c618. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de78499d-cc05-4e86-afbf-0149cbbbff81.json and https://artists.proofprofile.net/proofs/artist/de78499d-cc05-4e86-afbf-0149cbbbff81.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 0x21a343e24a7363a28c512ba8747ac87e81c2291effb12e92db6dff42c4ba08e1. 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/US38Y2411802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449155481b511858bef5c9b6d36dc0ed5bb365a12e7c9cccf81ed7e17dc1254c. 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/US38Y2506481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2f3f55967a3686c9be789873857103b1f2d9efb953b54e58431c87c04ccce6. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/US38Y2510217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449155481b511858bef5c9b6d36dc0ed5bb365a12e7c9cccf81ed7e17dc1254c. 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/US38Y2506481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b4f790eca89b22f56fbfa4e6884227588362fde840687841b5044e610cffc3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US38Y2510218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0257b6c8d66c1fb6fa30c0f34020a10248f12cce7ba6b6e2e7c284f8fa96d903. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/US38Y2510221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287ba9ddf2b2fc2742a24dbc2319337520f19b19775184864dfe3565280f8ec0. 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/US38Y2501901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e8f4562ce0a411e7cc25c5d95d182ea198179b9f2ab6df16564141ac404fee. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/US38Y2510222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8e39ce9746150efb761379f496cacef11c289e0a87c063a90b007515047f99. 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/US38Y2519458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2f3f55967a3686c9be789873857103b1f2d9efb953b54e58431c87c04ccce6. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/US38Y2510217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449155481b511858bef5c9b6d36dc0ed5bb365a12e7c9cccf81ed7e17dc1254c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US38Y2506481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b4f790eca89b22f56fbfa4e6884227588362fde840687841b5044e610cffc3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US38Y2510218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29656082e27bbd976ba0446dd9f6d4fd6de44e900424ab909de8358f346f3b4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US38Y2510219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ed769c7d1ff15f9cacf004fb97402b230aeb06988300726a6bd0ce1928a138. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US38Y2510220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287ba9ddf2b2fc2742a24dbc2319337520f19b19775184864dfe3565280f8ec0. 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/US38Y2501901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e8f4562ce0a411e7cc25c5d95d182ea198179b9f2ab6df16564141ac404fee. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/US38Y2510222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8e39ce9746150efb761379f496cacef11c289e0a87c063a90b007515047f99. 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/US38Y2519458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fb1d904feac7e2659860d95d51059c8c6b652c098f1d9b213645689a652f4a. 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/QZTB72555963.