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 0x28fb8944c6741434fcfac65b7a44c90af4768e4dea4407474659463146077df1. 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/cc80335b-fc86-477c-9a89-29abb24d7bf9.json and https://artists.proofprofile.net/proofs/artist/cc80335b-fc86-477c-9a89-29abb24d7bf9.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 0xa15f0e9d7245e053b912295191a5eb3d7e896cafa59eb2827bf8718a49cbba2a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/NLLC61300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee5ab296ff650b7f2c7e08b1ef772970b5b5c5ce1a14da85093365c58c72a79. 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/NLLC61300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5399a3d6b9f09b2b030f39afeb3658e239d07df4da65b90ebef801a43a4948. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/NLLC61300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8d576700ad15c2dd096c192dacec65739d07217fbfe5974dc295e299630dac. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBFBC1401240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3555dde77f407c7b9f2f61c6e1959f4a939dc2acdcb595e9ef517ac7880a1d. 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/GBFBC1501284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43d17b9dd9d6aca7fabc7661fa71806a490c44ff951dca1a2bc712f286c6191. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBFBC1501286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6052f9d6e123372945da676a433ba379583b6ef9f32d6b807e9a402d97655482. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBFBC1601449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb2d4057a18c6f645698fe6997be593a84724e1c1139d04b383b4a548c3758c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GBFBC1601451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469637390e5ad573e54ff0e79059bff1dc11a89505c9976dfa1dfd68fd7ebd06. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:52:56Z), 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/GBFBC1601452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32a0cb2b3638b43e4a580a821e0e285315d2d565de6e9e65e7986fa24a7a49a. 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/NLQ7C1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba469552aa5923cca77810c92cceed9087c9e0e07fa5337dae77dda5932cc032. 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/NLQ7C1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf064231c22fcb91b8825f19870470bb49f09e75f994a00249d116ebfe71854b2. 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/NLQ7C1800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329cb9622b14b89d9e90e04d930ad4cc31fb7274b73edc265c7a1e7ff621ba59. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/NLQ7C1800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190b84002b2b8c17368d4f3fa9e72a19643e90dcc852e2757e40809156103db2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLQ7C1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd645e1f2c42d019c9cdb6b825137a56781da5cdaabb468b0e1d1071cc1f42eaf. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:52:13Z), 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/NLQ7C1800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb221e4273ad027cfd98e0ea336e9d650d54c849f998b962b83b222fc214f86d. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/NLQ7C1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2d82611e47f010e2c6b9d59da212f6c1175039ce6d148116d9a8b1fa2b5d56. 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/NLQ7C2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8710f8a11cbabd8cbd1e6e6f1c5ff98b5eb087f2802135eb26075de605345986. 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/NLQ7C2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e676ca0238419fc3b0f97688adfd031e8319c380106e7fbc6a3e7b73e3bafb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLQ7C2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c860ff24c9c295d1b5bec8e043e570319afac034c891a1668ac00a63b7df8b. 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/GBKQU1916706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15563f054f26863e6dfbbeaa778061269bced7ecddb8f134dc0f420d8c7b5c70. 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/GBKPL1829780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4301fefafda746d6763ea8083f3a4c3efc11f29f63c350a4b45fa537d9312b. 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/CA5KR0005448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722e8e084a17438dd1f09001628bcf63a18b7464ffcffeca9295ed9153c98b7f. 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/AUFF02000214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea68538b2309cc8d53660fed4b9e8dcb7c5a8abed7926cafb694d0eb3534a61. 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/NL1LE2102523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaf8b862f761cfc9cde6a01a13d4062558b0518383eacc7c0a2d24efe49f241. 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/NL1LE2102451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43abf3a3304fbf60f07892bab43f6fbbe4c738fa9add6f1666acd312c31dc658. 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/GBFBC1301075.
Hard To Forget / Midnight In Saigon Remixes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34403fd734440dad015c9c9067de115ac81bda596c641f4e20a927936421e493. 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/USEAX1703183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca249dba4dbfff869f6af31adef50a802f31ea67eb606057d70af5d6c8d449d. 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/NL1LE1900225.