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 0x3846bcbf3a7eccd09bd401ae994a946c78c7a9bb034fbf6cd52349296a41b010. 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/11ce56d3-2c8c-4f05-bdee-69d3549f571c.json and https://artists.proofprofile.net/proofs/artist/11ce56d3-2c8c-4f05-bdee-69d3549f571c.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 0x7c3e8388b265407dea118fbca9eb947a725be2bb5000218b33405caea2a8d890. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USL4Q1940179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ade9eaf4d2c5fa6e3de6cb314ea3af632a922dc7d496d94abec3b8efe18671f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM82051590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fa4205332e9a1669e33d67b2a761be4080839428e873332a00b4aaa82af406. 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/QZNWU2062297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075bdbf84a6e0f5e339dff0518650816422fb188266cd493397d456949083aac. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM92148872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525afe8a4c5684ea88a3507688cb5548d743c7c50bd2e3fe78847bbac5fc0788. 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/USCGH2328780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae07b35124f70bfb92153d1c15d3c6066ecd0072e5a01605067021345fdd8dc. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/NL8SP2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca1a8cd8cd49bb1fc767235c1725640072d5bd91afd13cff9f8a26ffac30c9c. 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/NL8SP2400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e4552de69e5ea012463921ec7497c2b4a305de1186ec05dbcdc7168746947d. 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/NLFX52300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2bc6b216ac43a5a6cce84f930fd1f3fb695248751b7e034a678cce54c40fd8. 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/USHM92249930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e4552de69e5ea012463921ec7497c2b4a305de1186ec05dbcdc7168746947d. 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/NLFX52300024.
Wilde Westen Presenteert: Welkom In West
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ea1ac8e3132614cdbe6e6a6b57096c5a6ac13fe55ec073d7cd30ee3679ecb2. 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/NLFX52200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7da063dc7b6816dc8b5a922ed9384985ef520d5829990e793a6cee2309a616f. 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/NLFX52200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e4552de69e5ea012463921ec7497c2b4a305de1186ec05dbcdc7168746947d. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLFX52300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9a76dbb58993c67a0bba0cb4e62f5da24384e8c72a26cbe43882dd77ec1061. 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/NLFX52200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915f21f52f0c07975f26c36f3d6d89dd05c9e87762dfa5aa5f3876ebab1588ef. 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/NLFX52200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4274303a08f2b58c8be2c93f0ccf28543aee432ef5bf4dd095de93d01129d5. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZHN72114530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf8976e49f13a73bcff30f54b1c5164176679d5184d7eb02baa4c8ba229c0f7. 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/NL8SP2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6177d25f6b1d5e73aa580b7dafd7104823989a21078ecc33e9fa023d92e8511a. 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/NL3GQ2100286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6177d25f6b1d5e73aa580b7dafd7104823989a21078ecc33e9fa023d92e8511a. 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/NL3GQ2100286.