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 0xcac0b2e35a2c17c5551ce9be699b0149e731d9926b9fa154bdbc940a1890124c. 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/7628f886-b388-435c-864f-a35c2da03f75.json and https://artists.proofprofile.net/proofs/artist/7628f886-b388-435c-864f-a35c2da03f75.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 0x2863db4f3052f97fa4295b862f4723190fa12ee970464d0a5c772b73b7cdd43e. 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/USNPD1220611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebd67b8ffa4ac405d96aa36c6b1f8c92e2877e0e0549d8cd0e2f3b0facd946a. 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/MYDT11700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb346a04b98b8f4f5fbf1251c016b945c03d4bf6b956ffda73f9c36c4b729836d. 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/MYDT11700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8601d322b291a096984dd60efab00f8665a67bd9f662897a57c0231e60fdef. 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/MYDT11700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0856f5c76a7f7a4202f594b1ee2298fb4f48ae28a5fb6920355946050df91b0. 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/MYDT11700027.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b0ba7efff2867bbb74db1f31aba00e929a28bdfa7426dc4f39414b34867554. 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/MYUM71500547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3d73bf8c0772fc03759dfdbe893a2ae5bf71407c62188057b282495e9dbbe5. 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/MYUM71500550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2907307cca361808a2a7348dee3fb3704a413be903aea92142194b69943037b. 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/MYUM71500551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc5361a28636a88a8a5503bb33f1450491d5a277ce6b188ec8555d870759acb. 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/MYUM71500553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881adc6be8ddaf92d96e9c244acbda8c2581cee6237934766bf04ab015e93f8d. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:35:32Z), 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/MYUM71500554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9631f82a6598baace6fde3edc4457f4e7e61a60be4afb34a86d1c2cb920b5e. 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/SGA037301392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecffba91acf0e59805cb2f13c1a3f54c2e4230cae8de42d3c969cf06a44d98f9. 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/MYEM10700218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46733979396f96acad0bfe7802427730bf8a69624bf80ab0a5e4451eedfbaf35. 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/MYUM71000546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dba22abc77494986c3a58462db3d3ff206c892dc54d37040588e9ecf2b57ac. 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/MYUM70900350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513aae8306c710c080c105b4caf8a57cd3ea2bda65af0cf7d04132d6e200793a. 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/MYUM70901097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe280b4792dee909897b11cab26b661a11e49e78791dd0906df42b099c327a7a2. 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/MYUM70900311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2201a1593356d44272998446f3be548f337c4a961c2b0b8dcdd4dffac86231. 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/MYUM70900947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9963b4adfb363d123cb5cfab3f8b77e53fedbdffa08f83eececd3be8b09032. 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/MYUM70900471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46164f1abd883a86404fa391767332d223ec804938e04b2a41a874e7365d4799. 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/MYUM70901426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e6cfd15d0276f83f96b80c5bba5dfe225a16bbca5dfc2f2f376bd2964bbbf6. 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/MYUM70900472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a166c38557b51e0d9a219e517cc5e0a54fbb6d1e6f953f91c189bc17d7fb36. 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/MYUM70901423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63669f92d2a7f9c3274ae82c02736ac52cda5ba922fa567cba351c2ca4a0ac8e. 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/MYSM11201151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284c9136fbe1bd6c8b2eb50597c38368ad8d0ac19fcd6c439eb13819bde75ab3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ESA012558033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e06efb46b1f9b3e12df34c09a805591972144c1ea3c0bb8594c8a67bb02b74c. 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/MYSM10600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64749de38c5af3a120d6badb055639dce7b6ed0d473e7b045c1a8b672eb1709. 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/MYSM19510024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fbf487ffde5c0f65caa6a7798f03fa38a6595a993760bf65143106c606ed83. 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/QZZ972430886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18058333ff5488b5ba71a88320a81f2278f2b8c3f4557adccabebbb7f39a2ec5. 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/MYBM10300789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75879a07443d4f925a11a5cda874d6cddc31ea58f8631a4c7160ef2fec43d893. 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/MYEM19400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44be4cab0548062c1b6580c743c40baef32ad7a021e1b42f6b9f7f6751a1abf1. 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/MYEM19400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa304bf775d41b8037fd29e5ff5e340772ead9ba81c0a6e5b6b24824cced7fdca. 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/MYEL10800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7880cfaa84fd7c0f943b938633aa684485f627d2fe27a8b174b807db1c561a28. 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/MYEM19400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f478943870527f879c1566b6a1592c07b58d287f1b34a7d1af59f1d21227244. 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/MYUM70900221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb3423aeb4a3a8fd6e8e08d5824f779747f933aab63e4f077ed1cb2620ddff0. 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/MYUM70901650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75879a07443d4f925a11a5cda874d6cddc31ea58f8631a4c7160ef2fec43d893. 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/MYEM19400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7880cfaa84fd7c0f943b938633aa684485f627d2fe27a8b174b807db1c561a28. 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/MYEM19400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc36ddfc88c027df595fdc3ab6b52fddcb62bdc4ba7f6e33ef4d0fc1914f6f4c. 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/MYBM10000495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f755e625fe565a8e61e266638d4281167520a11b175a3f74b9dfffc1b8373e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:09:28Z), 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/MYBM10000491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce65725041fb60a0274baa16bc2ff7cb888aff0d38650f4823992e1d2b8b756. 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/MYSM10600338.