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 0x2214551a559e9f283ba1c340992855f8ce0b203e6d62809a31b0f08662c8d404. 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/0c2bbf8e-39cb-4b1c-8b1d-a80043bc8ac0.json and https://artists.proofprofile.net/proofs/artist/0c2bbf8e-39cb-4b1c-8b1d-a80043bc8ac0.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 0xc1f06c9f9fe910796987cabc7b7d16eefbac082f7205b765dafa6befb1f05762. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWY2132814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba7d5394238f4dbe70277d98ab8b4961c0cad9d44e392e90e8b562e957575c1. 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/QZNWY2132815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898a59a399859100d819983c72d18ae57724618a4f745953668af9b48c1f4b49. 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/QZK6F2169733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536ffe55e8068de9e48335aa392c83562ffe79f57d1b3c19386331336abd194a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZNWY2132817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d0f5d4e2fb167eb07ded11dfb1b85d84180b8ba4bf7a181a371d3e78902818. 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/QZNWY2132818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac30a7cf39551f0c8e5390703376775c96312202a911a3d72dd2d45a51fc431. 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/QZNWY2132819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813c1effd0733110ee4c061b09dd3a040d8e1ac15aa70a7b3dd9aef8b7aa911c. 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/QZNWY2132820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed353c24e2d74fc62a895ff98747ea886e3f5cb77efd6ff55bdcccfd244e394. 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/QZNWY2132822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50458e2c75b2d92d61bc52664aa5503e50c9d4e6b857d9599b4dcee307f80fa1. 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/QZYFZ2479303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ee446b29a9c78efa0bdb9d0dc5d15f3d85b01cb785bb05d58493a0ea7ab433. 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/QZYFZ2479304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab5c4a2455b04c39f73469f96e0627ac2600d7f5cae2a1e7d67eb436c67fab1. 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/QZYFZ2479305.
LOS NIKE (with Seikan Anikila, El Chulo) - REMIX
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748730d89f4b3ff75fc2bcbac0840fe35a77de26515a721a9a41bc859c7cccd7. 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/QZYFZ2479306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba071a6a6af7bad8b653e3f45ffc5c1e28e31b6bf812903a01a238d1883f4a36. 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/QZYFZ2479307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9c1f6e1aba47e4828c32231a50abe64990aa1c9a0a366be2b32d68208361e8. 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/QZYFZ2479308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe31d20d55a5f05651feef69cf2f9d36bb8c15069ef65f476ece2adbc78a0a1a. 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/QZYFZ2461346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6f1d4d5958aba3c8dc2ab757c1472bded79576230f438adb171b9bed8babc5. 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/QZZ662461638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55833029b7822083970ab46126a3ea9646e729f5a99e5139f734ca86c4e1e48f. 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/QZ5AB2484822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fab303fa81a6661ce7e69d78f9d5ff55f1b737b66fb8ccec1170b1afa4c5d8a. 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/QZ5AB2451213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc045be97ba57f382b5012530f1a205f320ee0a78734fdca03e4614a690ed598e. 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/US7VG2426646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e4b8dd09c94d8b0c115c914a283114e6658aa8f5011b001087d379be0cb299. 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/QZZ662312762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d0493affef371b60ce95f18e258e80e2ba03e8998f0400e2d60d5786b6d388. 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/QZNJZ2312937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64033e4f5e49b51ec07f6494ac76fcebea1e5ad3e81ea4224474d15870f46959. 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/QZNJV2389633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcbf2af23968981645c9ab04e5790ce2af6dfa7b1e7294c7cca30c31408ea2d. 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/QZK6M2378983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a66dfae84418aae040a86f6941fdecf7257fdfe0b48353daad1eb8a89348e8c. 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/QZGLS2319892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116281d03997e4a48eccfafd44c83e9adc2fd7fe1422e642f6a8ceab29668433. 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/QZES72321046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33e03ea2761744a2940079d63f0197c0927d7cb2c3a8d1f7afe60d978e135fe. 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/AUMEV2307302.