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 0xa7a5962818619c4cf493f59eb0b47390ccec87381ec6cf9c274381bb7b62407b. 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/2927361d-45af-431f-a928-ebb480577dff.json and https://artists.proofprofile.net/proofs/artist/2927361d-45af-431f-a928-ebb480577dff.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 0xd66cae74f8acb164237d600b12fa699632570cd553222e9e617188e27bfc3d41. 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/DEPI82300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7722dd2c6f47a6468e4755066e500efed97c8ab4caa2e52755d0950a7645b891. 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/DEPI82402674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8025c806935d782af86211ea2fe9f460530b558178613ec76551796cd2d2d0a3. 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/GX4R52360053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2f185fd189fb390d4fddd454211b257d434ac79f538a73c3d4582e0f6ea712. 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/GBWUL2324452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c27c50715f02d8ca75137d6336906f530e4ee68bc6bc82da73b862dd5a65fda. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/DEPY32300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0f13d8d50adf9502b4b3af4d2fc3c90f7317080b1f32c5b3565b3bb006a978. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GX8LE2367064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ac15e036416b3ed8960d3da381b359cbdc89a02be63df8c75655506e1a10ce. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEZC62343554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5945ccf88f010f1b10949a14f44d2504aba725b3e3e32fe8ea78ef7c4dc2961. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX8LD2371216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29bda13bb8e632ce2a6508b347930625e85cf9dc3aa182358a8de8444120bb4. 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/GX8LD2351547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026e23b407093a1e74adeb658f910b26ad887c7389c06cd1ddbf17cad594a419. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZMHM2397530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8fb9a29cc9accfa358a3be0486fa8085ee412bc6739bb304457ac277993a51. 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/DEZC62317690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c90c0a0d686191c3612027999219c7a931fde2e9f38f388f9d106a10c30f241. 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/QMDA62278837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9251b627984f0d1a32b6c83342599688e43ffcf39d6637c39602a82a0d0cdc9. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZS652231291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28aa2e96429a4a17a588734dc4462d8b4c3e3fea2516c0c38891909111ca6ba. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZMHN2231626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31114a48ab765b07313e018f43b8163f476db99efb329c0518a51d481f94dcff. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/NL2QC2100835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb11bd1a7d1b3ac24c2a06c0360ba71e7334252c06bab763cfd0c6a0b5f49165. 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/QMDA62258887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f8323527532c479d6e5f5f3e88bf4a9dd3ee65521bb74b8ca0b75174555cf7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZC62298855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b917349bada2ca212164772fc664cf5d1f1f76e2d678c6f798d3e6117701c0. 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/DEZC62297241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ed86b42e55c536496d9ce794ebf23611a46ae09adb1f0d2fd20a5bd74644c5. 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/GBKQU2276269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c56a67b432d5c36a61bc5e0ef4bfa24cfbb515300214ce128dfa5657c5a7edd. 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/QMBZ92249787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ae019630072499162fc625ca5db9a1f4628143205b106ba6cf38890908b13d. 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/QZS672276552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac52371547b536835dd9047fdb1ff2e76f6d15b1e2d41147c746024bd61d9bf6. 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/NLT2H2200359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef987773933da9775c16e93e431f05259d82413ef2c5e96ada048de5477a034e. 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/ATEK02299003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d43cf3ee84ff9d046ee8e9599bc2567fda3cba5958334c2800eec418f417544. 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/GX38U2256874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6136b918362ac2da83808c5d3942266d92cbb14c25a77e558701f84d3c809d49. 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/GBKQU2213769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9411d1974d268f2451117df55daa5911793c039a2aad7c07771187038d13f4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZNWW2299195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39836d12b940c77cbffee474bb1a3e6401bbd8d24f4ad052ba7f1620549c2273. 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/QZNWW2299197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00288ac27b5d0e3591ef7a15c973291295e26ec228c5bb3457595f269c454ff. 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/GBKQU2254022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf08bd7aebb9ae0a9bd17be47919a0967b88a79f958b545a48cf80522fa1e284. 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/GBKQU2261742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8ad3f38070e411518ff375f97f6d0955001073e725205891c4ee90a3deb3f7. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBKQU2283302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fe8bfb03f8f3c0155906e8defc3c4c4a5ed4e767342e71c8d3d471b1314fe8. 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/GBKQU2332935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf81eccefa2b4e5e9a7ff82978dd71a9e364de1eab332231d201e1316463f09. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZKDK2222865.
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