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 0x48404d00af3bee2ee8dcf01ea25739cf2f017028f04d4ab3a547b4a0bd91b156. 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/11e342a0-923c-40f2-b71c-25375aa7fa1a.json and https://artists.proofprofile.net/proofs/artist/11e342a0-923c-40f2-b71c-25375aa7fa1a.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 0xc6a3e30c7f6dc7cb51188fb0fb53a048dc3a1d5b5e3bc64f49051d94233bb99c. 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/UKN492402550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8858a4f9631a980846ce46aeb1d65247ecce123cfb885efe71bce7ddbcab0d25. 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/TCAHR2338537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfa7c92e255e7f29b3e1dc127cb5b1f25f087071217a94aef4b51b8d9c78ffd. 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/TCAHE2347322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb414c8f34027a73074bf5bbd5fbc25f0e611e6294926b246e50c4123618c9c15. 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/TCAGX2393539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9212711280826c0cf752a4468c2729aeb28ab04b04585fb656c582130807e3. 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/TCAEA1988176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae664326db13c5c5499a461a6c468f2c0488c01fbfffc15580790a9a2cffbfd4. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/TCAHG2371015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520678ebd3f88b391101fefab389473458c1e736179633356094365f8db79f08. 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/TCAGQ2297662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb414c8f34027a73074bf5bbd5fbc25f0e611e6294926b246e50c4123618c9c15. 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/TCAGX2393539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520678ebd3f88b391101fefab389473458c1e736179633356094365f8db79f08. 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/TCAGQ2297662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520678ebd3f88b391101fefab389473458c1e736179633356094365f8db79f08. 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/TCAGQ2297662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee43c96d1558eea2b52d3499eb85c198fd5148acad151801d7a35a894e9aad5. 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/TCAFW2179515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac078f15ba10556a5548e4fa429077d5c1bd00363be365d6db3fb176a8c6d6c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GX3Q92149952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dbe75d880e43f64588921e0d47da8abfd61fa601a311979898de839a09fc94. 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/GX3Q92149953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa32088f715489a3350902e3567d1576dce9b00c595960b9e9a6fd311fe5bf4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GX3Q92149954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ab5b021e891ffc60fc1336efc494b54a5167c656fccd32dc93cb0d199719c2. 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/TCAFC2054934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1d628e5831ee78295ee1ae3c0cfc99fee21f707df7ce80635f0037b9175ed0. 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/GBLFP2023607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8776efef9d69943a3b06e80ece50751157df88a79271511ed5428d0a5f92eeca. 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/TCAEP2072363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6d55506dda883698aa4c6ae0a5727c02e81ce4031f8422b6106de1d1c47a83. 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/TCAEA1988173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961c5ba8893459e9ceebd0f96e0db39d8752da07580631a6ec598b9c4b8d3f7d. 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/TCAEA1988175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9212711280826c0cf752a4468c2729aeb28ab04b04585fb656c582130807e3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAEA1988176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc5528b53908f393b95e4fa8159f54960f2d0f2520c4a440bf264dfb7935769. 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/TCADQ1872445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449f4b05e04bc9f6cc79ee22c8dc6f262855dc84c8cf5a97ff08c36178266829. 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/TCADQ1872429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858ffb9c9064d99ced7cfdda7bb589d7055664f07619087eea5ef6a15cc2743f. 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/TCADK1707455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b50261abfc9f04837841bf3eddb28d8916882f386e35bb196c31684d95d3ef. 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/TCADF1741342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef756f2d3bf81a9ebaf481fdf5fe6957d28347cd24b523292380b61e658b8fa3. 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/UKN492500417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2437a16284fe39c24d581067970ef7273727a77cc2cb626a164fbcbc97dd66da. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/UKN492406710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a3e30c7f6dc7cb51188fb0fb53a048dc3a1d5b5e3bc64f49051d94233bb99c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UKN492402550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2437a16284fe39c24d581067970ef7273727a77cc2cb626a164fbcbc97dd66da. 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/UKN492406710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409b7819689c737f2fa6714b22d367096fff6a943f2482dacff39c050f2c535a. 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/UKN492404662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a3e30c7f6dc7cb51188fb0fb53a048dc3a1d5b5e3bc64f49051d94233bb99c. 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/UKN492402550.