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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 0x07e0109d945d73f94dbe1c3ba3f29d87b78774ed63e276a063124525ec7fbc41. 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/2d264b78-abb8-49b3-9306-b886de12a85e.json and https://artists.proofprofile.net/proofs/artist/2d264b78-abb8-49b3-9306-b886de12a85e.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 0xd6597b06f138ab30ea16339ab0e4c6d8fd3f8c80c27898cfc4c6df355c6b2835. 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/US38Y2405502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbaf4d66aa8fc475745c7bf1bcf029f47f3dc2921446352eb8d48437e74a822c. 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/US38Y2403809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0ebcb89b300496e033323f158da81ac9d9c0e54f8556ab50194f3094f36ad5. 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/AUDCB1702448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8955773543fb88bbbaf1c8067f73d058d87b06e94126d140678b21c992520f30. 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/NLF712305317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa455c3919857e2e413362ba97240d2eb6086d9994d8f9635693a260192ecb375. 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/QM24S2304131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939f1c319a45c96556afad8f43f3819bb3b8b4f653a29669ead075e5cee722c4. 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/US39N2202158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91395129e22b5280b808dec6aaab6babb699e46ca5150594fac7ab556ecd560a. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FR10S2205590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4cdea1f82c3dcd50eafa0b54819466558283d1e230855ffa0ac49bae552b7b. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBJAJ2101661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc675f23307361d69f7e55429990247092f1f69e64b779cbd9e0ed2cebdccbe1b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBJX32163040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efbdcb2dcc3eb18109e36eed72fa5d012db0c82787176b0308e4596df3bbde0. 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/GBJX32163041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7b4e88f736c93a09cc562834731a168a782fca4cddddc09336296ef1df55a3. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GBJX32163001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecc1a81577f37dd80f12389deb71c993a9209bd9b245161383a5544b687ca63. 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/GBJX32163002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71d6123b50a619655b109933a3e58276920e824f89a52d22f66d0e482159ddc. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBK6Y2016201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af2456773c579883cd2de63f484927e08e19b044ae9cfd0616b9c3a322ef4b8. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBK6Y2016202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d5754290b7efd52523926c457d22f6549e6f836f51ff977587d0049e6b45e1. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QZ5FN2098688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b6813e2cfcfb9bbcca116caa8a49368684192fcfd9301edf3a5615c978a4b2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBKQU2014782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd381814e3ab18f2fd6b5e358791548fdf0f3d259635f431a22964b2c9f283e48. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/USCEI1221131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f1b022efa98369a6d6dae29031e14f822f203fbee69286ecf5e4f31e5c5821. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBPQS2000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1d3a04150d4663472b3bf138bc95d27633f02e46450a54c0b843e127da2c55. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GB9UU1900099.