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 0xe445019192f523cbaf0aa5efe4086113a979d312258bf9df0c187fe5e4c91c3f. 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/35cf3d5a-2937-45cc-9c65-61c735b54aeb.json and https://artists.proofprofile.net/proofs/artist/35cf3d5a-2937-45cc-9c65-61c735b54aeb.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 0xedfa427c8bcb5cb5951fdba16573f36fa7ca948d0430af958d6dd0c2306dc149. 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/FRX629224010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ec59e0d29aed15337adf777fcd01863de41cb8ec5958776b6d291e4a0e2438. 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/FRX621055010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41eec933579b8e7eb739922d00d8180f8e1237315401c313b9b9a7f9c3dc708b. 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/FRX629985160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd099f9a778c3bebdfd2a923f7de93a2398933a95f7a779b839cedef11143b82a. 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/FRX620488040.
Elle Chante - En Duo Avec Bernard Lavilliers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654d7e25f5f94625add7c73b2742b085cc756aa27e7e376c94431421f742a02c. 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/FRF110480010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a972344cda455f4c68523173ca993b7ade9851964c633c46f7f4959005ab79e. 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/FRX620550040.
Yamore - En Duo Avec Salif Keita - Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750a08ca554cd96e773629450f45d8c5788b9b997f031f215f9c9d9ae7d7c06a. 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/FRZ020181330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ec4308dc3c9ff7b38ad86b51c2add8312236adfef1dd4e5c7fb95994414537. 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/FRX620145160.
Quel Casinha (Il Ragazzo Della Via Gluck)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c48546eb876e3b4edd1a456ff7ecf7a58006927436223d1d206b1af12b8c99. 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/ITR050400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57cefa225dd7d9f2043d678cf89aa7171b9565dcab393c732a344392e9bee57. 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/FRX620145110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b93968998c44d2c6ca4662a44f1892053837ff98b1f929416af2b651cb813e. 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/FRX620145060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649d1d47fb2a53065d181591964da463f788dd62d494dbc4bd6b16ff2fb08c65. 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/PLA330100624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3667909e108de6049d262ae7044dd1a4684d4769729aed044870735213447e. 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/FRX620550170.
Historia De Un Amor - En Duo Avec Tania Libertad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e67e04be08bb54566e180a270aba60edb1de1a5fa931862cfaa9359dce227d. 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/FRX620147060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c3051201d75e96870deca084e692a14cac7fb624375a323e80c662766607dd. 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/FRX620145030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb172e100126d143b3d9bc520b00c01438a1c05a7b017e570596b757cf3b8138f. 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/FRX620145091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582492e7cd53ba4828a942c4392f52cbf651e0e99816434182e9295be4cedf23. 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/FRZ039570070.
Sodade - En Duo Avec Eleftheria Arvanitaki - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59029ae44c797c420159266d6cf5a0dd224735c32d0cc91b909e80425008600. 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/GRB019900177.
Negue - En Duo Avec Caetano Veloso - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a7d07af989fcf2eb548774a2cd7035951e3b36cc4ed7e935972919ec81e032. 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/FRT159911000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19accf5d7cc7cd27558c523858c684aebd511f6f31f304ef0cfc6fd0a15b9efe. 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/FRUM72400728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19accf5d7cc7cd27558c523858c684aebd511f6f31f304ef0cfc6fd0a15b9efe. 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/FRUM72400728.