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 0xc5150b9e2369f33872a6217c0639f88455a2d4f8656e5ad54edaaf4d5858a34d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06336b6f-69f5-4acc-8e6a-69ffeba19a70.json and https://artists.proofprofile.net/proofs/artist/06336b6f-69f5-4acc-8e6a-69ffeba19a70.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 0xe395cb11ab3ec078ee4b32b4d1514ed1b17ab4b4d79b9573017e5726224d5941. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZA750945701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8dbbf5cdb0d1bf513628453acbef9ea176e80640a7049d0d55ae6fcd1a4bd0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZA751252409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8936f36ee18ed5b7eacc6b7b3eb1705b5bed4e85a44d53fac71696f2bf6161a2. 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/CZA751555711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45dedf0f6c955743291342ccf69ec7c5275579f3de21152b15ef932905ebad10. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CZA752055901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94c727a99a6af8190784fb61b29ca9080d1783a1c8d94aab6bb3f455e0a766a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CZA752055902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00932e9136c25a9c8e138040d8dae710260c0a806f5d447d3d01368c7445e22. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:26:17Z), 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/CZA752055903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4347f27e3fd73ffa5a7a5725e3a9fbcb478054f36aab2540f471d55f42df6e2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES72463093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bb380a422e81a932d945afbf0943c1342338df6d41e907eaba1a7f84d4465c. 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/CZJ452467002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327490504e64f5a20dac83b80c705c69d4c75c853d020632c50454de071527d4. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/CZJ452467003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c772c0329a059e26dc351b97ff88fa9951bb053d095dc35b4b209bfdab4525c. 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/CZJ452467004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8e53460cacd8a8aa85d94315e88e42eb2551fa3b12eb13af7e817ef2acc452. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/CZJ452467005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b439ba758f7d24c4b2a65f5ef42c4ee85e9d931cafce72e9c9528c6513e3588. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:08:49Z), 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/CZJ452467006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f3b6a94e7d0f8d24c3c61c0b68a26fe1b322741ef4f9b2cf792b416874054d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZJ452467007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf613d988b0ca07a2b80bd8f91b74720643f3277c38e9514cd0f6aaf6fa0b6f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CZJ452467008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4726b37a2c7c7168c559a9c8383aeb59ad462e1d9c35cd6ae3b69e6a104990c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZJ452467010.