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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 0xec095b1947cf6d46e0c03a63e698fcf9edcb8c3e96d8036b47655a0b04c1fd72. 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/17265b1d-5253-423e-935d-387dd8de865d.json and https://artists.proofprofile.net/proofs/artist/17265b1d-5253-423e-935d-387dd8de865d.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 0x264193684dbb787593f60c5fe00a51db672725800ec9e5f9cd076f7c35e1179b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR6V80614991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045a66741570162131dd30fe1b58afe5fdacabbb4315abaeab8ad64977165d59. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR6V80614994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926cd5da773f99d8c8e81886e2a8f6d4d9e211e4d562b04b461290c4d3726595. 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/FR6V80614996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0da5def4251a96fd6ceb7e0b43a6e67dcc2932cef348d066a52f05d0c0c6bae. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR6V80614997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ee24bb8e8e1d7f24e0bf188edf4cbad1dbcf982d5eba0b2fb5b5c541c0ee88. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR6V80614998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf855fdeebc47e79dbf541a2bc9473de69d4b8028fedaac73c922913864c1d3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR6V80615001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd0bf026f2d707afa07b090ef9c1227e637b2770c9f41a6b49f68e77fa0408d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR6V80615002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49255d5e67594c1fae50f2d83f16a732c7229d824a6499edad6637cc015d819a. 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/FR6V80615003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94356e4ae9b8e555b791fb3a27a9121a641da88c6c768818f3ddc10aacfdd13. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FR6V80614992.
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 0xd315ef5d9d55cbfb89361efc0128fedd9ff8f66964c9c910ebba53bf28d36c98. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR6V80614993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b589caeed801ed6ac6d330c27b3522c74c5a0fdd72916f6b968fe1ee8e27592. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FR6V80614995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54aa08ba34ecdc955a320fd9a64e3294afc9cdbe780aa2462de377602757fb66. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR6V80614999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba4e29ca1cb64cc41023d06bfeb870b4acad658f1602e0064611b65bfe94080. 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/FRZ110200499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f2c043ef1b0b3cf45e81a659cb587736bd98de7a7c298fd3778a736c3b1bf6. 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/FRZ110200500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f62105954964efb8b5804aa64a2ddf63a7cd3c8298b345e90397980961af76. 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/FRZ110200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a67f43e0c7e815b41a5d454552fb67453dac12d6ee3cbc33bd2520f8c9440e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:42:52Z), 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/FRZ110200502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920b2eee894aa1dabbc18697e45b4610eb5c975833c1a435dea1ea576e59803a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRZ110200505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8246d6482ddb8a886a949cace86f68b1045ca613b19c359c7a90481e79c21eb1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRZ110200506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2975dda6a4ac30b19bde4c8ca422079c12508a3fe71a883f31323ee76bcdf38a. 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/FRZ110200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239e27d80f2379f90f80ccadb7ba48272541e2ef1b989cce5c3e73de83df5a4c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRZ110200503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc60ed2376aecfea80eb0db3c9012378345df60a4d994477ccce13f523682959. 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/FRZ110200504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11b96c2539cbc3eaca5ff54f23884fb51972a928c5fd344f8b029c9805b730c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRZ110200507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bbc7657353b21ec7c8d6414b18ec2f5858411fd1d188d309012f9da3075af2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRZ110200508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abdd429320bf02e582465929a6c572295b658dadfe8ebfef89ca8be353ad4be. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FRZ110200509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62385686650d9882aad24718b93818baab9473d4236c28cfd7a780bb76f2fcdb. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FRZ110200511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb796266531f965c0106a86fb9015764ba2ad9ac489ca12400ba254ce3dfc056a. 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/FRZ110200515.