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 0x24576d7694116121afb4fed80f9b22629b41b5cd42313eec4f37bd9a6de0b774. 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/feab45de-430c-4228-bc5a-59f75132c7c9.json and https://artists.proofprofile.net/proofs/artist/feab45de-430c-4228-bc5a-59f75132c7c9.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 0x55894f8e7b324427593921636c2411087f784354a5a8cc2d90bb8d8ac2bb59da. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CA5KR2502951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5823ab404a35b158977835d362c9c8099dd0c6a152a547dc904152a4db99e109. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:06:00Z), 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/CA5KR2510562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292309d65951a08f1856608a12c806ff9771e6ca32a0c8cc47d0668d863f0b97. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM3DF2407886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4798c85b5ed3b2eb00b69157b02c0b8ffc832280d0bcfd53665030f6ffdff348. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:11:27Z), 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/GB8KE2504106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8d7c00c727b0a49ac9ece53523e3a0ea9abcad43bc7defff7a5dea1e268d57. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USUYG1715044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d5446bb9bc1daeaad465a40e1c7be894a73eea5138aece228be57a1d11227f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE5BU2584851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6529665fb64dd7825c0f4620e65aeb3a19590fda72fe46c751b3513ec5621ec3. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/RUB422501258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bf588be40efd1a10472a4f9c5cf2bdebb4e2a58fef1339a5aba02fd817b65a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/RUB422501259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063070c2fb570febe229177a820144e6ae89604f0348a75639c029997ec77d4d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/RUB422501538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c156813d6d3b828492ad130038d8dbedd45b334abcd1e522c8a61a2b70134f7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RUB422501785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d43bc059c0a96ce3256e10cd9285435304801a55d94d15de784adffaae6f81. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUB422502033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af9504951a0e3c6b69682e1d3dec01338b3600245de2495a8d444f5eb2a1c27. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/RUB422502035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46f241d8859b9c48830379b5862b2984b2d4b168cd894b2bdf370db35c24228. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:03:36Z), 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/RUB422502387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04ef9d947282bf558a85205217d851c7f4de5dccb80609a98eb6981210a9bff. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:11:06Z), 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/RUB422502388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e869f4a37a0a44ccd0a9767f2adf3a1d77faa95a7ea30473319c5d9ce10fe0a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/RUB422503865.