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 0xfdd431e4e3f4bbbaadc8d1ef44c7c0e4da43d34b0f069fe7d7dc97775705c872. 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/6e59495b-e08d-4879-adb3-0039911695e6.json and https://artists.proofprofile.net/proofs/artist/6e59495b-e08d-4879-adb3-0039911695e6.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 0xa3c08c8652e7fb89e3149bc0adc1d4eb8407ca8741d35025a012c089819743a7. 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/CBE622400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebbee576096acaba407bf4eb35e8f6c93374c80fccc60f75657f18fd3ee1a46. 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/CAHFO1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92f1d01889a552859d0a0dc26f569bf2ca5bbeb558e1a856911450d32ad451e. 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/CAHFO1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212326595f3da146ea7f60695f6bb0c15fcf9df83cc445d7c05971d7745c4853. 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/USHM90922616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fd3f49f109c95773028d29cdd20b2255695d4933e5ccd92bdacbfb4bfe390d. 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/USHM90922617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7aaa7a6e3402a0c77ee391959808f8b6160d0c1690acce95c5f93f5f5c93ac7. 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/USHM90922618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fbf9bb9003d40164a136a87d9d9c21122ade73f551a05591bf1309a19f785c. 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/USHM90922619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc811cc08e606cd19a5633eef756d7d8ee2781dad52c37d609f2df6d19a5c42d. 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/USHM90922620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ff8121afc70fcdf3eb40a2c9405312d5dbf5fa763716ff91377d1a5e9c1521. 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/USHM90922625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bedeee7f837d601ae1f56ef7fdc4aea7f66e54bf3638dce11036a7c631d9ba8. 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/USHM90922626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1b4b7f929d175af1a114a7d4b894bbea7da4ea3c57f33c714500d643f2c598. 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/USHM90922627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34c4a109aa7c2fd2c75b333cd3d70e54d45d246f95650d90e3ad0e297042ca0. 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/USHM20666190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e17ee1ebafe1cae322d45a51ccd6860fa00d9506c67f07c49d94cb1dcfa19e0. 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/USHM20666191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9b22c0d3c227a1a65c5cec0fb3f4f0d5c9b7727bcb3b54f9fad0c076aea2fa. 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/USHM20666192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ca0fb06c2a2964f90f57976073c84dce64c5869a48c0cbe33dafb680550159. 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/USHM20666193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38108e149f48c27f5c4e19a9250ade235995311df66a0fecf0f46918faca94f7. 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/USHM20666194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d9114201ff71cb71eefe5be683e5332d177a9a600bf13acac7bed9e8676e89. 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/USHM20666195.
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