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 0xc538e7d2b1663bd65594612640705697182676ba7ab536566ad06029ec56bdca. 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/41e505be-9eb5-4514-b462-949602970f62.json and https://artists.proofprofile.net/proofs/artist/41e505be-9eb5-4514-b462-949602970f62.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 0xeb1b509dbc3c938191defcdd01b11fb9a9fd042423088f1f6674e6ba79697a78. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHN62260606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5378d2774eb144c665358f2d46c4b5c952c04f1e97225224e031351a6388b2f5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHN82212146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cac2a8b75216fd3871837ab2a635c7d03d4a33a3ddb57f3960dfdaea8a909de. 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/QZHNC2251133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449475f328542f701e057a3357f931fc77b4a1485d7fb38f866226f6ec55cea1. 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/QZHNC2251135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94571a0d8fc8dfebf4e250bf143625611e8cd83cd86254b825110b2abfd7273d. 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/QZHNC2251137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2587ab5c0ef5e0007431538d5afe7ac9472d5df250b03c5c415137e77c2af9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZHNC2251132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1b509dbc3c938191defcdd01b11fb9a9fd042423088f1f6674e6ba79697a78. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHN62260606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5378d2774eb144c665358f2d46c4b5c952c04f1e97225224e031351a6388b2f5. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZHN82212146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665a7335bbe3567cd365f63a18c3c80394254a4deab9f7aa307596aa4aa6471f. 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/QZK6H2278386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa148680c7d37124151b6545e544ff7977d0133890aa95d4e4e55eb5dceb0fb0a. 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/QZNWS2224953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3def5b72716da64ba437b673f75ed075abea36f290416ed59abb0796677e1da. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWU2205578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bccde8933078354c877b8b75886170d6ea9b3d479931419209c5991de832fc. 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/QZK6N2327065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062139ddc21a285225ef2913aabcd966b15698695823ffc293a4f1ada3fa2707. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZTBB2231987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8e8489b3ec4df2c5bc60c57142e2b266a137fea831afc3473965756980b108. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZFZ22317883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96001b0bd4ec5324c44bc36b561f80c45fbfa894e958a79e72488dd3538d2de. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZWFJ2392546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64c660905b4df2ef0544c38415e5aac490b5952f5cc05bb2187e16674022af9. 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/QZWFW2489559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b66cb7187282ca449a7b782e3d35079f7efbfda93c8396fd490b61b0a7c7267. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZZ7W2450052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0b5168aa2bbc001969ddfe6ba6a9ebd9bd7f36ce7040c6c20e22177b4eebd7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFYZ2561819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e215e3cc9c81f48ae2da4a8ac4f31fd4dbedc402a32ac155902520d7f3f87ff. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDA82558979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3852d727e5b78effc5f8eb97d92b3f5286fd5e0035a1ae916b5df69b29b1c626. 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/QZK6M2568428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe262a9b54113cbd84e2983f38db4e056efe3d0a9ac1aab35f18a86487cfe3c7. 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/QZK6M2568430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631449fd5405d475067e89e097dc65b4a562e3c8407c6a78c1bc3a078a8e040d. 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/QZK6M2568432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2301442f26d4238d9a7e6436194d3242054acda2cfbc8970c332449be6252f. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZK6M2568433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da7344dbf26c324d41e4e0784d566ff13e135974be7172610f2c66d9b0f7714. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6M2568434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b9a175c042a04c6bab8ebbf9d0b3fa0a3e617ba4d66a242303cf271b1813c6. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZK6M2568435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97d1a5910e57a8a926bd37e01e37945bd07354f79219affa63a878f95ebe266. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZK6M2568438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed60e8fe9e407195b63c9927d5cd29e2c763dbe81cb47e61e855ea9e9896145. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZK6M2568439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54140ddef7c80b780517f953ee333dac25a45c063498c8b709bed1f2b745f10. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZK6M2568440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48e0160f8e9e5ba0a692e66127d4fe1786ed106e5a854a7ef6127997cc1e937. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZK6M2568441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4579523b1c99a30fb5df53b5b3ad9348be38587edc285f320e3ce3f3c27d18. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6M2568442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e637e09e619d3bf078ecd82d2bb01eb1c789edba29afa795c57bfea431f718. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/AEA3A2030034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a07f827674d1593ed1200d6cd735304415530dd329e599ae7efe6d09f85ad1b. 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/AEA3A2001841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb673f63efabfacc1889f45f3deba7261fc06d4312e5eb316cc41f048898df245. 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/QZPEW2455161.