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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95815cde57bcc2aa4feb1fe77095686695ad406ec264fb188aa8b2688bf3543e. 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/4ced152b-80c0-4e89-9fc0-370b9f13b202.json and https://artists.proofprofile.net/proofs/artist/4ced152b-80c0-4e89-9fc0-370b9f13b202.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a57509df19ad8cedf8ee7d0652b74bfa930ed07b59f09fe558a4b298e73bf9. 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/GB2LD2010252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce89404b1987af655d7f4487061f3cd154307c8a863dc7fc78d4907692042af. 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/GB2LD2010212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020a6593c87bbbf67141ed0465c222c48579109c6b76fab8f57151116b1f5c60. 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/GB2LD2010182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5157fbe2da6b7c9a7672ffa222e2066e3ea4070e1bdf1d0289713e6a05a86a. 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/USLZJ1949333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8cc1845bb718ae1aa6e789f38e0e98dd9e4cbf65d36e5283b16359808028bc. 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/GB2LD1900522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba57ad6e59bc5e0c0bc0d7208b047b1cfe4e5a937a1824400d34a0177557be22. 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/CA5KR2323152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d13b7dd5a2d45ae3c678c99f510ddccf81b436ea7c380c3e256ccffedd6b698. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CA5KR2323153.
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 0xb65c93719d000c092348c8ee870208f74f1426ae7edf1a0d8945fa8f6b11a84e. 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/UKXN22294385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86880d9331f4c155e17779405a123f2f967b16b6ff1533c5b61c067f7bb22d0. 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/CA5KR2298337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740fcac4f096eb0471bac3ff6771a04bed5568d80e7ecc7fea50b41993b0db45. 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/NL5WB2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cfd3c1ce39be0bed59b473b643867d3412c0ed4f7c13a171852659f852bb6c. 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/QZMHK2004814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c0ddb473d855c29bc9c28123d4a5e0481011b9591178fc857b4769a59c7918. 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/GB2LD2110051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61356403b428e21f267566449187180f84d4ce31c79a45958e8dc1b5977456e. 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/GB2LD2110049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9c04c62e1a6837be1031c218e5af8cb2833644848c07de63269406a5ead7aa. 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/QMEZE1948932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3081897e8ad4884e5552eccf273894510a42cd0c9e75e83e0115600e34b3da72. 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/CA5KR2088694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a0bba644434253e4d8ee2d0a2450d63cdb3777a0a3c786a54703426e423db1. 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/QM42K1925091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1fec1fdc3836f7e3cd631aa28bd3763cdfc1aee28d515ebc6cf971f7df28e7. 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/QZDA82062325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69c12e1b9afbc63020797d555b50ba41d6817e79b00b5fc389766e0b456d3c9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBKPL2086965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8609721e1e632b2bb553343a06a7a0be6eb4ee678f94819a88cbbd2612fc7b7c. 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/UK6KW1900171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc995b28907c43f02167c777015d4cfea4166ce6583951acd53fb04410aa131db. 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/GBKPL1976662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95a2b8bdbdd717e1d4b9fd13e14d175176003feba5d0601ecd3a37d931b9eb5. 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/GBWUL1904233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4349904673def22f32cbe8148dd029969083c5a404031f757a78614bbe0444af. 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/GB2LD1900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909966bb3647f63e14a1fbd0de4addf302dcf0c520464242bb2c603a3039151d. 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/TCAEG1946311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc94db89b4eab1d17104359acd6faa3de4550468ab74e8b3195542401bc3eda3. 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/QM24S1906012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195f8164fff475122d448f5d251c666ae4c6a47ffd88e8f91e4c78cf056250a7. 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/USA2P1900544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b979fdfb95caa52656d058408872ffc78335e55cf2284e493e6fcc0ec4277c6. 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/USA2P1896977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9865f9dbcba73570f9fd7460990a00f3d364b8448fc10ef4079bd646d3d471. 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/USA2P1892052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a57509df19ad8cedf8ee7d0652b74bfa930ed07b59f09fe558a4b298e73bf9. 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/GB2LD2010252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a57509df19ad8cedf8ee7d0652b74bfa930ed07b59f09fe558a4b298e73bf9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GB2LD2010252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a57509df19ad8cedf8ee7d0652b74bfa930ed07b59f09fe558a4b298e73bf9. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/GB2LD2010252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2102986895a3669ab027f63784e16fb79ac29c39ea21d9a736b886027d4a41f. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZNWS2106805.