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 0x3e43129e2271d71226480466bc85425e7f2b9701ccff1a96318940fedcbb96a7. 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/4f0625e9-4b25-485b-a69a-9ae7e9232ac4.json and https://artists.proofprofile.net/proofs/artist/4f0625e9-4b25-485b-a69a-9ae7e9232ac4.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 0x6aece5b665d02f4cdf0b499a8d220923013a1f283f7c66ef69f2ffbc0d99eda7. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USDHM2403822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c030cd7fbf3b2d2a8fc62fca0fdb5d9bfc0f3ca14469e65750912bb19d97ab. 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/USDHM2403823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ef526a3c8cf9ee184c831633e6179dd21ec098eee84e7aa8ecf06ecbe86c59. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USDHM2403828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9082b584c75a5dbce6a9b69db4bcc203e7eb4d308e6b618905682e35450815cc. 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/USDHM2404451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac16e3a0c8c1f48b64412cfda9cbdedc4f13efcc88267c65434deac8db41721. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USDHM2404452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20249fdac691642435c9797ce9e672ee0135b598401325726513c39712d4a2c6. 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/USDHM2404453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c96b7639825ca3cf5085cc035aefc1eac7e9bc2705a3ba15cc7c08190a6fcbb. 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/USDHM2404454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e0d192d14c8e957a3b66f779e40bef1ee649c3e654eb324a79603eb05e46ed. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USDHM2404455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc772c6e3e154a491f83e461a588b2e30e1b7e3047f5d8356542c01464f846efa. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USDHM2404456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ee2de23e14134d713eceee52f3e94b7bc72df4ad1ed2b2f7df3b8f24c7ab16. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/USDHM2404457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be9b79a64f57b75dcb79d382ceba536ee2291fd40312363a8e3e896f44310d3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USDHM2404458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3782cfd7df3ea70062e36dc5045e1b7be59687e8d44e1968fe7f8f6179adff05. 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/USDHM2404459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f88c8dfa09e97abc7a9e68e08afd7b198cae59cd991d2a7cad02b115c9c755a. 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/USDHM2404460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0d61cf6a79dc375616ab004e8c03ac034d02ab93c743e62223f3dd1d7382c1. 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/USDHM2404461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed66287ce363a13731c33761e563a0ce475c6f39652d6bf5ebde231234438d1. 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/USDHM2404462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf987bf5de0acbca2c825437d7f824366b6dba742fd3a17e4a934714777d5a61. 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/USDHM2404463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a36de0f6ab039fcf268b115338535a97140669b51fb5ec5faeb170b4c775103. 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/USDHM2404464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a69998d16a25ef48010163e40a5ca3001c361ed6e31034eab0339aa3b394357. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USDHM2404465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8375c1df3b9212ebe6e5e4afdbffacc5a59f7ec84ecff596e66731edb08c1c56. 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/USDHM2404466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f01bf5fbb9488e77187d592ec62dbba872f43b1dbae280c7060b379223feaa. 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/CZA211000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a9681f2770a0f43bb8ef6c1b83ef96c95f5e6398ce25d9d87267918f9bfebc. 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/CZA211000198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d88da7cff5b52675cb6a83d01a4163817ceb6d149b00bb595728886ec76c3de. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CZA211000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff31d97257a7eb01c825861aa855c438ad0120bd2d824ed930382323777a42a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/CZA211000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe468482b35086f8f03ed5f59cc7441a0b9bfafe213f30082b7a2c361b7c0480. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/CZA211000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0888d8d9be92ceb9578635c00ee698f84d432c876ca0ed7294354cfc998828. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/USDHM2404433.