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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0d4b360a85f5e86bc55653cab6e48048ebda733cbbc0ce9d4366310a0b9523. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75642114-6e1c-49bf-9616-9964f0fccdaa.json and https://artists.proofprofile.net/proofs/artist/75642114-6e1c-49bf-9616-9964f0fccdaa.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a11d3d49a89920a0553e1af05f99d52c770f1ad599d3d2edfd45b13050d3bbc. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:31Z), 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/GX53U2057554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbaf2d840efe02c2304f21da3a24a1ec0f09b82e3e834dea90d3927d02314a2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBLFP2274671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc019b8840346005ded9531b4741ff8c1a1545cd3ea4a7fa2e9a9bbfd5ad9fa41. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:01:40Z), 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/GBLFP2274672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0ab3f096e5ecb1717cffbb6cad60bacbb4c390ac2599ce66652545e9a2f42c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKXN22277040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ff37cff2e927ad3e2627b0089892565e78ef1ebce9243413777606123edbb4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CZH442300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd05cbe74b3f41895c0a2a4232da11a3ad43cc2c995e2c641d1d2f98e8ed6102. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CZH442300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c90c91bed43b67ecfb036b7fa713f79fc6799e6e3cd41e3d7e5399f424595c. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/CZH442300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf50f1c7886b3105cc41093180f5d2538ad661cfcf3be6288fccf77794836acd. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/CZH442300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be9258a426c957c4fb50e2eb166fea6fa1bacf77351c1aeb841f5b66a90fadd. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CZH442300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ac90c5918ab46512c49262b8719799d501f77811d593eb7c5265307588317b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/CZH442300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd78e417ffde47bd4cef9cf71d26c43daa736d85b25efb561735feb4243988e6. 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/CZH442400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5a92f5c390343450cc541c79a5b3eb459e5cd65224cdaeaa669f30a990c3db. 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/CZH442400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661e762d26f0e24c1e0497a8e918beb7e6141fe37deae417e462713c1c3b75a1. 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/CZH442400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45940c06fac5bf142b8029bfd950533c08dfff8dab2c8c008a07b22cf83b9288. 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/CZH442400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d6eac57fc66f16eb39e71098e04a50473bc7822352acd3ac5a2b05c6fe4ff2. 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/CZH442400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf5044ef8cc0abd8e849db2a5b4c7b4b451105b991ad4b3333e79bf540bc770. 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/CZH442400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf876a9b6ced40c4b07e3930e5f4f2aa9e6e1c690f467853d98a25ec16974fd6a. 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/CZH442400135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b8dc1452e44a861d082f3d60671d1c026a28c1f62a18fa1b9dc35fae418d28. 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/CZH442400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1919e29c9a774116ed0b72b4b21edf1dddcf5e36e3f8762f591e9d977fdf391. 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/CZH442400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a191b93b6bb1ab5615228d73c47a17db094c8a1fe4ceb4592456124a6a1111. 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/CZH442400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0af2fe01a65a4fd2fc611d0bacc42ba6511d23717ce308cc59284cafa05a366. 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/CZH442400139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c325ba0a92a7eeba26210a59316e00103330c3cfbf82297847925b0f1b7fca9. 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/CZH442400140.