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 0xc4e3ad1551f060519b2536eaaa48c7b9c91d279e2190392dfe2e1ecffee06752. 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/69702c11-75f3-44ff-9b62-84ff659e9b6d.json and https://artists.proofprofile.net/proofs/artist/69702c11-75f3-44ff-9b62-84ff659e9b6d.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 0x7058fb5e9ca112c497e958f076f3fca729fb4c169bb2c267ae4a08da5e8ba333. 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/USVIC0524808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbe8d5f223a0d887ac976a64318b76b6a4124f6a3b30372f075ac3f2148409c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USVIC0524809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed375555e547b550414ce54cc2e82065f461f6902f25f4b05bde10ef98c97be. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USVIC0833901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219a8f035307ecf2374fabcfc8a567be1a6c2408a3fee6804f849c055cec5474. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USVIC0833903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563d7b0cb2f05899b12eed5b0ca999e58ccc02a5c0bac754df9517f14fc5c2ff. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USVIC0833904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42fe8d58d1a3e7df8d5c5b35043509324a7b1089cc935ccfc9c21f832b08188. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USVIC0833906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4183399fd6baa3e6f987ac14ae72edbf55f24a6d8c0c34926ac9226324efdb6a. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USVIC0833907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359884433bc311827985724c5a38fccce221fc18ee297ba6239272dfdfbcd13c. 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/USVIC0833908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064f46049e0c29bca9f7e6c279fe8e3765f446696fbf21846c72e41b3e5c4284. 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/USVIC0833910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111934fda3251be57280b8ea4b139f2622c326d1b69646c3f4b828c7eb3553a1. 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/USVIC0948601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc832fd9f192a2d0c2583ba8f10eafd8c4ba3423800972b7961283e82804f0712. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USVIC0948602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf630c22ce4a3b9b1adec1050af573c8451f252ba85634741aad4e0625fc81987. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USVIC0948604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589a2bfb6e961daecb0960fe2ff993142f495477d92127debe9bfa2111c70647. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USVIC0948605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b90d9cef8d94fe2c3d523de5a4392fffaa03eb17187130e3405e6c798ef8692. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USVIC0948607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f479d3d4f614f53ed5d5d7087185152e66904124415dfbca3c8a438eb527da. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USVIC0948609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044303a892d039d13766983532c3392ab5411dc7f38cf52935a884c68083a8e7. 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/USVIC0948610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fec901b4a79c7d457b46de3f5e89dd64b9101dc1f52c95f6c52789c755a4834. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USVIC1056101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fa1cb039cf277f26431af168458f1c72eeb26af64dd8a22d3f1b45789f807c. 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/USVIC1056102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6644a29701cf51bdedc3b39825aa7f07596b3322c99d70a78b902d0f2e5294f. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USVIC1056103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ff540a2a917f9329ea0d343db54743e4b2adcdcb01b94a8c85a4e447164bc8. 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/USVIC1056104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0f2287f312e3ae96a3668a33e2f83390b7ff78ea1700cff4e8b581b8c5b632. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USVIC1056106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30129646fc9a97b38d2d36e063b0f4cb92639deef299039097abbb25ca8b225. 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/USVIC1056108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a50f7c612b7164cc0752d6cd7442f814538a20b5e1bc307c0feb97d1746613. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USVIC1056110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62ea5bdb415fec44107c467c382fa9cb6c9869b5413ea18cae920009cb85713. 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/TCABD1279411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab8e06c674690d364b3ffb85c6ec18c074387b8e241b41fb90613f0feef0940. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US5260709802.