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 0x8e89f39f3dc942704d1bf0675248e29e4bccf79df0a5ef052042ab95afac64ae. 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/7926f0ad-a171-4a92-a295-d572d8ae70fb.json and https://artists.proofprofile.net/proofs/artist/7926f0ad-a171-4a92-a295-d572d8ae70fb.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 0x2b4d94a90ed71703d0628c7ccccdca70b9f8dc00dee7dc2ba3f544c353d0ddb5. 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/NO2DY2300167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aacb32413db9b1d2f1e71ab32450f10508b7e2816b97e3f89fb539959d9244a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NO2DY2300486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56af732f649b97968ce7bb22dca9d53606e5aa6d1562ed35e004d8fd83c7c151. 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/QZK6M2485656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef18ce0a9f3dfe37ea117b18e269bde9977ea4e6df667edd6340c1a24c40244. 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/QZK6L2401398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef1964df54202eeb107d9244755f42c641ed52f5e8d0bf5261642e52a210dbe. 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/QZHN72481954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1195c727a68f08985752141ccb207585e5d97d9ce4552b740dc26cb1f20f3a1. 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/QZFYX2436568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1083fd2e8ee6da321b1a1301975c044534bb68c0a97728492939064f5ef3a1b3. 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/QZDA72381853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d824c47b46271568036335d6f5a5d16e4ae6a386d5158b858025e15923cdfe. 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/QZFYZ2387284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ac682fb2b3a7f766f6916e2384938021d369b7c0a038e460e37174d0fd052f. 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/QZFYZ2385951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da3a024a9b6af124463c1d944d60c78b9afb2603e527eb7763d6a7be3b6ec53. 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/QZTB82276813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28c6e19a69a98d7b1fe9ae060700a3cbaf596f4c8a289c4765758faf04b421e. 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/QZTB62291958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8877845cbccbba36418a91381cc8908db37c0fc312d8f9d4f89b68973c2c4780. 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/NO2DY2200373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612e13ba9952344d1b150aca03363245c45ca73530da67c468a074dcd2bd221d. 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/NO2DY2200321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d337ec4095ec1eb7722bc45190332895c4edd41fda2b9f24f813b6a7b57d625. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NO2DY2200291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca9109f361f27f1d84f106f65eaf8dc5a169a0e3cb95c49f862e3c5496f5505. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NO2DY2200171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79078e4c4bd6f87e982d068eb97cf79509237456977e7592dc3da6ac47204274. 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/QZES52255694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4608ca63140adc5da72647d4f197166968ebd5eb3fd76322a2011bd031b3bdec. 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/QZDA52242630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ff10985684a0fa3969308176c62188d28e614fc974b0aadc51d58a0b5f6042. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN52112635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bf292caf9ad96d11559ee5ea8dbe88ba926bcf8e5e8ac5122c859cdb1417ba. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA72192849.