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 0x69b3589b24bc5f05573a2725c565869cd487ba68f3a9dbfee8704579dea7edd7. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65f6b57d-af64-47e4-abb8-be0a5a1a9655.json and https://artists.proofprofile.net/proofs/artist/65f6b57d-af64-47e4-abb8-be0a5a1a9655.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 0x5b324ccf51fbde709ad692e40b9c800a289982fc61e88197b04436475c3d0143. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA232201108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca67830b32df0c33985444c5605b96d0c61164cc2cf6d5b91d2681f19b2ea80d. 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/CZA232201093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb540d3d506fa56ddda073c5ed4f1a4a27515d108f624f353ec54dad7d72fbaf3. 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/CZA232201112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48abdc59966250926b9d5b9b646583770431b1a88947699ca39d1e3cb6fff622. 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/CZA232201095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c09ea87c4f696b9cbca6d031460fcbf3ade9fd58c49b300d53647eaa0e71431. 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/CZA232201098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743fb2371c118e61f45acb864e868a4485066faae493f4aef81c24e8eccc15ef. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA232201100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f388b2f602a5dd7d0a7891f83a632775309ec4c949d27da8b6f14a61f1aa1ee. 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/CZA232201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef17a27cd0f3a364cd2386f06a626ba300ce572c19bfb617ad941181c720ef44. 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/CZA232201102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d493aa76b4aead558b0a976deca02c09780d6a0a98b91faf6cfe696ccb043b2. 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/CZA232201103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cb93fadf915996cef856226d118ac466b02d9a649f11b3d09f47cde247b49d. 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/CZA232201104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d44ac1565dffc4e15640fdf296eacc47d63d6b2a4ce57851bfd9dc73d18206. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA232201105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347c75b877ece10dd94f30120531cd376ad2436bd40acc7db095763655f184d7. 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/CZA232201125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1b6f22423b5361ef4a81ef8a2cae2285dc7334b638dded4ccab1032c8e3fed. 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/CZA232001331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7e569b191a089ada96b3b661e17a0ce81015920fa10746d731d04b3694e067. 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/CZA232001332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd02ca922dcd826cf49c0ca2a7cb4e1cd0149bfff52bb7c05d68aa1c6d6ddb6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA232001333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42521054aaa8ddfbccc25a9d89e63b0aae190c578e5092ae47ab9f3f207bfcf1. 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/CZA232001334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3c5bf5f6a3dd06a4ac3e6144836719218f8d390b5997efca924cf146d92d94. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA232001335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90322770c9a37311b0a82b38a3ebd35c11d2b40bef1b58456296d01ef85f9757. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA232001336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76a8277b59fe58073cf84118f206e50bbeded427a3e9a27de23ed4a6c3404ee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA232001337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5367019a7d20a16e99ddf9a2a4be229556b5cc049e335d25c620a24962354448. 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/CZA232001338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9590e31abf5b9f1b96b2ba7439407b033ccde58a7066f5ebf829ec373206b2d6. 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/CZA232001339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0e34f8a49509f8642e171e13e910dec47a1c7b5a906faae9969d06e301ba8c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA232001340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2656801a1bb13fca4b22da89239f53931f960a88b5e130c34e2c18f3cf2f2634. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA232001341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1400ccc6e0a0ccdf00ff28f81cfcd9963923cd1fd748d79ebafbb1079fcdd6. 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/GBQGW1290117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5932f1efd3e4c7ab53cacdd4a565ae20adb79d87b04526bb1a93e2b4e791770d. 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/UKMGC1700019.
Lord of the Mics Battle Arena: Instrumentals