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 0xa4b56ee6756ca98da5c401dd2fc45b00e9b0747d68c177b903c787dc73e496c5. 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/fc402bf6-64d8-407a-9da9-99cae84f6213.json and https://artists.proofprofile.net/proofs/artist/fc402bf6-64d8-407a-9da9-99cae84f6213.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 0xd9d23c3803642f97f56c8b206dc8aeaa54693ca4af7f182c7e3bf56fd25ba2fe. 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/GBKQU1532138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5e698c8be1309c08ea30920c579fba0f457e92a0cdddf5aeda2060aa603152. 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/USLZJ1757109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4132f94e0b69477c2ff27e3772f0661df74bd3c5bbbc8cc6c38991a638102e. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZ5FN1848504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a3badcef2118e73d23a1892283071a04a5a1cc9008abd7af03ec9c0f3b24cd. 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/QZHZ41981717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d1483965a8ad7b7dc5c5adbb2c14ba3f3cc921c20970a90ac1a0171eb569c4. 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/QZHZ41981718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a6b062575bde3aa3f289e239bd8138cad4d98bf96d8756069f9b8d49e648ae. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZHZ32031948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95832371715f72b6575a4fe07f645bc5773998525d69f3b3344d5a0fd432da59. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/US7VG2154908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278ff186adc4c6beeaadfd1958c71e431f7bf56e42e7557191ac580ccd15ab28. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZGLM2121063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a96abd38642028998160fa924f4f03e8118b1d56507d5d6b3b2f4fb75cfc707. 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/QZHZ62145335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ac718a23ccf557d80796747563941f05824290b09b2f710cc009af91b290d3. 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/QZMZ92122990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f79aa9d820760a5b8c225680f60627b07ec76480b8c8335ac78b6c43fde47dd. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZMZ92122992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbe8f7446c502205003277d72ae5d048e69e70c796a586ebc2b61e0a3463aa6. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/QZMZ92122994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec73349d43f4856ce955b613cd75f2a746b0056a215b3b962ed5cd367418b4a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ5AB2268979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa747277be35fe2b1ae143c9d654d1394bc1918303adce39e78a20b1d5aafc946. 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/QZHZ52228432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b15ad7f19421e9b95c57413832ded6a7872cb5a791a59709a853ff9c646aa7b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZHZ52228434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7047c347d36ba875f4e8b938dbbcd36f831ae5b5c9387e0778a8d9959d31de78. 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/QZGLS2228219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2827e82d67ffbbe110c012677c84008dbe0415151942fdd115de2c82bcd9327. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNJX2241270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b0d65b012ca0a0bf9f956562ee0384446a955103a78277e96500c27d656eea. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZTVM2257194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c66048b39adea614fcf4d0c03626e70bfce71d56798930935fa56d43853661c. 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/AMA0H2400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddce3ab9c87d4a9cca684d3ac6214041b98b68df13f3019c92c03f844327ec6f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/AMA0H2400306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ef21436e7955303c9d67f7fdf7763b5dc47cb09b49ca1fc27816f5b33d2019. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/AMA0H2400499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1055aba6b32fc33bc86bd4073414f357095380792a747b6c09cc30f319e3b66. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/AMA0H2400579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086f90caf001d2c7e0524aad036aee99c7660c24860c3287ad34eb7d8906273b. 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/AMA0H2400580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6d059f8ad16657cfb0baf3777ee9576498787206fe577987edebd5771650df. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/AMA0H2400581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba1f9f11af52ffbda8895cc2fc2cbfb4640ce60836e0f46c5dc230274c4e531. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AMA0H2400582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628b3b8fb03661b3ff53a54d08e106484b13dd410f88a9f79ca301230d79ceb0. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/AMA0H2400583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80103c3f0f43fea4515f8dd64c0b7c7060cf392dcfaff7baa726fb94be6f0ad. 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/AMA0H2400584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab2ca0a4f3e59f8d5603962c0d3c1ef0bf399ea6d996209f18635e87290c814. 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/AMA0H2400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ef21436e7955303c9d67f7fdf7763b5dc47cb09b49ca1fc27816f5b33d2019. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AMA0H2400499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4ffd1134f69953692b3509f1a6e81e768ffed757371076f0db62a1c951d045. 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/TCACK1572952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf702abb3d4c4d6aa52bbf8b06988f29df4a6defbafe725bdd070da171cda275e. 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/FR2X41744496.
To Party (feat. DenDerty & Danny Zuckerman)