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 0xf221aa36ba1d1a4795dcf04e1af6c577d124e464078a99ffb71a1f179c6e6ede. Chain 2 (Bitcoin): anchored in block 953689 (2026-06-14T20:27:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a6f104f-b288-42dd-b4f7-e89261c2d78c.json and https://artists.proofprofile.net/proofs/artist/6a6f104f-b288-42dd-b4f7-e89261c2d78c.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 0x90ae3a57f08a35957be993bbb952026c17b7b5c03d3a82325670d1e116d2eed7. 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/QZNWZ2332469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd515a71454209875b37c851d2337469b6f060c86b5ce6e3648d0eb39e55034. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZTB82370061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8765b5103ce9714c0a59a81e7f459d52a48baabee1e1efd9587a7d801e101e2. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZTB82370062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7bd2e3674c4e4141b2ab56553d6d792eee6dcc77fd7ed7b8212c892bd19921. 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/QZTB82370063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9952bb135eeba255084167914ee938bb02cb6ca45740082940973facaad967ce. 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/QZTB82370064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d46b440111194dbe9118cecb90826da12d4a882d72719e042dd006fffab606. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZTB82370065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75368ffe9f869be83db2ab309d5fd7fe23792c20df735cda1ef3a80015f89b03. 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/QZTB82370066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa291bc1a31386bb50e20434f539ea0e4c0c480b91864804a636e02f954224379. 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/QZTB82370067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0965db2dc4b0e00c3a61bb1304a78ab2a3695cd97768b8a663662f16862525a0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTB82370068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6e6c5938917bcf352d34a849bb99c2b159045b734a0fcb382868db9df78ecb. 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/QZTAX2409950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ddfc6d749a0c9be29e073cd7112d86f0c2afec31f348e547799ab9513e1f97. 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/QZNWX2429159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe58f0602cad6903c784c6b80802290d9c62883ac5d6612b018517b556e308e. 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/QZNWR2489808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f6726f98e7d3479152d1d0e2baad5aa7bba8c9e7a90a49b73f7afb66320bcb. 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/QZNWR2489809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6173501ef37efcf6c99605dc2019b832f23e82d76067411b0290ddad5d4a8f20. 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/QZNWR2489810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699d6e42c51648d8cf83febc5c4b65b56fbda058910332bb897c1f874898abb3. 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/QZHN92487293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5c7a1265cb44c6365a8937f70e6518f2bd9f6e8345b794d3c575e96d2f97aa. 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/QZES52435183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843647aaeacda001f4b318b6b4c27433f2cf57ea0368297217c256011fd00696. 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/QZK6L2321871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadfb1d4bb4135498030096263ca2262f111a6cb6748567d6f8c4633c712c798. 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/QZFYZ2348989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f194c3c631b7b35d4194a330dc05e92459d30f9b782d9f7d3a25ec10180107. 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/QZRP42205399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129cb7433471160caa79ae345732e08f4c3fcbb3a9b4286a38a29f932540219a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZHZ32036516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5248dedbc93bd21fde986dd9fbf0459fca620569163e51245f7c365fd717a7b8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/US7VG2091277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea4cce28972b2b47c6a5c15c2614f47f4af7a980241091bd2b13bc088227fdc. 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/QZHZ31915826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d5095d219206fa8eacd1bb3a753b2c5682b709a47c9df6f39b69954e7e1aa5. 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/QZGLS2454474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3a70b5405756427ceb685c12a16d36e2afb2a4c14021127921ae20714ca8a6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM42K2209067.