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 0x0c62f0a3a6f0937aee0d672fc26da18e303f08ecadcb0132502dd3688db7d244. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b211e318-c14e-4952-90be-b42bb8344fa4.json and https://artists.proofprofile.net/proofs/artist/b211e318-c14e-4952-90be-b42bb8344fa4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Table for One EP (Including Marc Romboy Remix)
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 0xacd0892b38f2202ddce6b9caaf4bee0d64a6b29ecc9e5c097bcf325e15198b24. 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/DEPI82322978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77eecfe5a10e200137912f8a344d1a1cbe1340b11fdbc07446c37b98dc12b88. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/DEPI82322975.
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 0xafaab0e5ed4979fd7d2da0b4a5f033d91a65be7e555f280b28e80493460e750d. 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/GBJX32000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c3eaf0ee40cc38888eeed983d4a4a34b3d6c8674642c1b0780174605f33303. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBJX32000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174c04d0584258cb31103929e2864503e28566bc6ee8fa6d36c7f36422ed3ceb. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBJX32000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf49bc7dfba04c94bd0a280efaf7a07bb4eb70ff9995c4b78065f18a496d8e88. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBLTF2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5de7c7b5615c7bbccf0fd092b481b336db684fed9896fbed4304384c885478. 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/GBLTF2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d200f0f35688b7672f49f1fa1511a280f5156bdec66e435c4a42e9ef36538d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBLTF2400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aea29b783d453900c8e1a28b4aeac0e97c5a765366a898640bc86eeea29babc. 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/QM4TX2475170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd469957dd91d28d39681febbde84ac8fc390f24f5f1d869180841873384d2b9. 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/QM4TX2475172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0784acea2f472682988cf7d71a6d1ff1673e45032837107a4b4fa4bcf4b317e. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QM4TX2475171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308f51340e27f31412ab5db61ab5299e17558ef6517f350309c2a70ea93028d1. 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/GBTZZ2300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cca45b0c66b3936e9acb34e0e8ad2081c0c3aee135157d238d657a51a1035a. 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/GBTZZ2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62aa58b68a98d2d62d008519ab72b5bc33195a549bcff7bff2eae587e7af24b9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DECY52300737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e5398494fbb796c1fd777bcf391bffd21391e36cf84783d7f5ae30b9e7ce19. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DECY52300738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5326ad08b9ea6703e63e25502e1d4d3bff645ea0bffe6b4b0914a67cdb89ecbe. 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/DEQ202200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aef3d2a29263085e762f5fea2755196a663975eb57b44d5611e79e81271e634. 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/DEQ202200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59e659faf96ad41baa67cac17161a872b8229353b4a50101891c9fdb51d1f0a. 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/GBJX32198107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23591b5d6a86b9e02bd13c21908d83275b6c049aed934fb4e10e7139e87e7949. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBJX32198105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfa2bb892a8b14eb3b25b1f80244cbb80866c32954d3751631d227efe3c51f7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBJX32266801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9326527e61b7bd26441acbdb9cbacc033c17e9c2521db9217446885084bb30aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBX6A2100137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f9e48a4c71a4f661eb44aecc70f45014322d9d66e50c12f69c769ea035a4ea. 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/GBJX32198087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb97d21dc8ce389602b749bb42eaeaa1daacf7aba0027f97c7edb7672395516. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBJX32198085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064b432913e01b840f9e213e8d4724a019fdbcf1ea83c0b0ef5711134c3693d3. 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/GBKQU2080209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d1c6872d9056141db831a4ca006c89ce0df1019a866a28d8197b17db540049. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBKQU2080211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b8c335d05e79b73c8e87eada1eee13128f1c8d779c18e4cd964cde00172682. 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/GBJX31966048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efcb94f2732c59427de14064de8bfc2e3c1d61e3a0b7c4530de55e8f24f5c8f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBJX31966049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602dcdb320d9153a2731073c4a89947f135a777908e9583bd82d2a4b2e01ffa4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKGGD0600045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2335c042033128134225b1c743d8ba713abe6e6a8260a076ba1e16dbc020a492. 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/GBUR61700135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61af77538ecc4b0996557c3a3d3548399660e58ea073e6f8e970d989053779ad. 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/GBUR61700136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d60cbba1b55a7b607ee06dbc4bad0897b801e1fa92642445cd40d876283a90d. 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/GBUR61700137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f759b53b74bc4faa78dc9faff79935489a5297ba75d4edbc33a86fcc78f67c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMFMF1525738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f60f51b257821232744313ca907bc7797cf8e3824b5178a356a31a7048864e. 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/GBUR61500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210f2e59adffabc07228146429bf0bd1712edebc268b9c23ad71761e49945371. 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/GBUR61500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f256fd8f4f799c775dd06b0ceb8346f71b2bbce3b69e6ed5b8de0690f8890e. 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/GBUR61500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33452ce91a8eaa55fe76e7048b2419d5fceb2b074a8e9eebbdba64ac6e4c3dd8. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBUR61500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6302091fd6b1ab6ebf3ff7ff813a8d247906c51156d27629028af30f537a387b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFME1407655.