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 0x216c90f2aa402d2a1f602b24a1418ed495b839ec0db289135ba9177bbd2b1fec. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f953bf32-9108-4150-8247-ff0659a6bc07.json and https://artists.proofprofile.net/proofs/artist/f953bf32-9108-4150-8247-ff0659a6bc07.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 0x15d9db1459eccb9e28b8cfa2d33287b0ae43a16d0ccd28100e0709bb924e5c12. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZFYW2036016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65fafd00b2bd6a75b11361e82a5693b0a51e9175b4944d252fdce93fc3c5694. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:37Z), 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/QZMEQ2034538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aab0d8e455fbe1b0a0c80456766760906fa6c0fb2ae26e03619d84543e0603c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZDA42196341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ab48b8649452270f4ae9c25f79f92f4d4a51179565e15338d952b4f87fc0e6. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZDA42196343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787a379c1e0d8f361ac60ea5135a62d4b0af528b601f835ec156da9944dfbe40. 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/QZFZ72124039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5caf95fc0e9577dfe6579f8189a69fb8ffd8b329829a5595672dc97b38f20e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA42196350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f50bf7ab3da3e025e987d827287adcafaaa49ff41282da73ba1c26ed9146bdf. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZMER2061582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ca885efff92618ca1e149ef25edd3d01432c3aaba99cc2c8d520af14984403. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEV2396178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fae2fcd14b12fe2284da43da65bb015ddbb49c0bc51673935775d1eb3afe88. 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/QZMEV2396179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a0b0271a89cd34654b249da2d6aada1ee7a709210c673b0ce53c880849bd87. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:40:44Z), 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/QZMEV2396184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccd543a82ed7d6865b6a22c545f0bf37c03e63a6c810fbcb0609f1ce0b12bdc. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFS2555818.