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 0x9f67d5b2a473746d35d7957d07b9ca430c49a5dcb14fcf4ab7a2874ff2e6d3a6. 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/801d27a9-c61e-4347-b22c-7e74208c9ec7.json and https://artists.proofprofile.net/proofs/artist/801d27a9-c61e-4347-b22c-7e74208c9ec7.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 0xa8722f94dafbced91ef5384d3786813de4c51df48386319cca777cb836e7483e. 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/QZWDD2376983.
Da Club Was Packed but I Was Lookin' Right at U
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2320f26a59151fa8f7e99f636d6b0dc0465ff8453b39a4153005134b64661187. 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/QZDA61855363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7eff58fa3367a921f15b5d7d611b1fccf17ab5744cf763f3480e127918a3d6f. 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/QZDA61855369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f4d1d16877758ca2424a06608990beb808e788aa34e4c9b6ce20edd57a5a89. 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/QZZ8A2304053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ece29e62d960c07659f1bcff76553004344d0b4c64c5009d5a4a1d0244ef6d. 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/QZFZ62381405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cebb7c07aa7a8c1de8b66e9857df4ad60fa49facd0dc4a39ea065030e4c2a49. 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/QZK6P2246065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b58df581796e66b9472fb10d8d79fb573842a4223dbaa6c8233028e35e0f35a. 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/QZNWT2231172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d58345c639ce3d40efba200fea19a451265c3d049304f4ac2130f0225167c4. 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/QZHN32230512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4551a547be40227f2572acdeb5ebb9b86632af06aa942b1412764e302d160a. 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/QZPLR2173037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5611608f71c5e163b27e5e152cdbdd8827390014c5f6c603069d28e10e42f3b. 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/QZK6P2173415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ba1c6d0d4630bec3842aa311805162f229a31d07a121944d58272b5f4e39c2. 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/QZHN61935350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772e8ed9a6ab4c4269dd3c16808f78934898ef0a6a6afcf38efad617bfddb4e9. 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/QZES51965703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979c7197a23b4d4f875e4e22e985cd803f6a7df3612d7a191fb30548e2cd2f0e. 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/QZAPG1759794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71e3bf4a6809153fae3f8c60980dd4f28c7acb4387b7f7483f913e632619a05. 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/QZAPG1760040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ef09e8146a2c9dc8e3c6c91f21b4defeca42952975406ee1d39b11ddc2475e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:16:56Z), 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/QZAPG1766833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1151ee5d027745b9caf3db46c93d25b465dba459ac51bbdf0de6295411e143. 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/QZAPG1759439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf41e1da1ae44e949dcdf52dd2032c81fa869631b14f371b3063cbc09f1ef1be. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:36:32Z), 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/QZFYZ1974373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aff8a861d3dfe2ebe95b6a9d7680b5841cb4b0840de50750b2e93101fe54a1a. 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/QZZ8A2396722.