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 0x175051278fb7612afd64380551f1951fe20aa494c2de5009b9cbc26d03a4d5ee. 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/2d347fc1-c713-460a-8d77-b4a04587d1dd.json and https://artists.proofprofile.net/proofs/artist/2d347fc1-c713-460a-8d77-b4a04587d1dd.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 0xd725c96e9b004dfda52adf931225a2ed2ea891a33191029a4ed0ae90a5ae2967. 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/NZAM01802206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d352c74fbfb0b63ab908b898191b50ff42ff80b293ded82aaffc85581ba554. 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/NZPB12303907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7991c666d85bf365d8d5a4ed5bf6b70ca7e0f2aed583c3f2e1c1a6ebefab919a. 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/NZAM02003079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df385e510757edb1d3e287db027aaff3115af32aff3ccda7c703ff62e1e12ef. 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/NZAM01600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae19b7173be46c90ad9a17e9d9c1cdf8bb4706e216c078c78e4448ef3535b14. 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/NZAM01600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1c70d6fd41b43b8cb713de365e2597c80d9d65a0bd444f567c583c71c57087. 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/NZAM01600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5acd0e37f8eafe5257e44d39dc685cbe5eaa78657ae9b4e7b293303c9c1113. 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/NZAM01600062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1a05e8d54021712debb87abb676b69baf5eefd4514204dcccaca868693dee3. 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/NZAM01600063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f91950e4a7d5764470fa473386f056564a7484e5a3f5c89a253d21a0c62b67. 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/NZAM01600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f01a991985ad1a80158672b6f0571187f539f7048d5e26759b274299ac9f1a5. 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/NZAM01600065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d507a897406a2207ac5de7f86f42f5900ced0255d322dfcb633e1f99a66ee8. 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/NZAM01600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaade920b1a27c644230f7f7820526c18a38230cfbe48c149596b0f49c04327e5. 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/NZAM01902680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb46b4df4be7ab83a84c1cc857467665d66921f6968e83be9dfdcb029d59d4ab. 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/NZAM02001390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2f4c0fa10dea11ae4b35ae2aedc50152238add0d6b8e4d19b94990cb10e864. 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/NZAM01902108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c19834f24ec910812db3f254f2159af05c334a57386e018ca4cff9e2414a5d. 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/NZAM02001391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd894fb77a83d0e4a74a9692d891069a51f74a37dbe314e800fabfe1785d98ef1. 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/NZAM02001392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a506c67bc330c0e8800877dd88789c15453d0e53dc06a03a29117e5a00a6b84. 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/NZAM02001393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04541d50e5cb6a97fe9cade16e80f85d392c0e61c4b683918a425d9ea8e8479. 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/TCAFA2014269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaade920b1a27c644230f7f7820526c18a38230cfbe48c149596b0f49c04327e5. 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/NZAM01902680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2f4c0fa10dea11ae4b35ae2aedc50152238add0d6b8e4d19b94990cb10e864. 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/NZAM01902108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813875be058ed43266aa3a1e580beb993fcb054248b472a618e399a1692b5fe3. 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/NZAM01701157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9d4db9b6c8e841aa5eff80099f774deaaf3e1d679b42c178ef1ba998641690. 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/NZAM01700449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85fe5a41b7c6ac97616dfb7558e2c3ce2cfae2b794a9fd2678528c5983d9653. 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/NZAM01500745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5544a20931a2791005a39f06ec6d610871e60f3fc3512aa0777bc5e16d5551a7. 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/NZAM01401674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7818c6aa6fe025e748e7d15613bd6a5c4440a909c81530b58c782c36e940112. 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/NZAM01401484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14eedd319890c219decad44f09b749672bbea5798a971d2dd838a6043d1b5cf7. 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/NZAM01401035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa544f29753e230272fac52537ee3aa209dddeb9e74360718cea3537aee8fe8a6. 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/NZAM01300622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fdd40a629bbbf4527812a5709bab3a9ef94c7450c6fd67776474f347e9a0de. 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/NZAM01300624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2913c8810ea923a3f6a0411b62a3e00a5e018a785295976414fd3009adde26a3. 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/NZAM01300623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ef8af644689fd0bef749211421d77b5df73f86208a0800b34594a284849c0e. 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/QZ22B2026820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91a41607b6f60754c43749d52dde749924624593dacddcbe07db92bc6bc7cfd. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/JPV751901117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace5609feb4ab7ff5d17df621b2a61feb92402c007b5a0aeb98bd83b971069ea. 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/NZWD02100003.