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 0x31b4392cfe38d2776d68b5848c59cc68db5c8d69b723f0469b8a87cb8c04b7e8. 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/120956f8-1d71-42d0-bfe0-b940d3cf6260.json and https://artists.proofprofile.net/proofs/artist/120956f8-1d71-42d0-bfe0-b940d3cf6260.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 0x3b3ca21d5abe3c88f809f47067b5ae5e991e8e93a4a1660acaa87fc7abb18be8. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:04:01Z), 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/QZNJX2459707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d516ac9be4e139c0a49154aa5b5bb35a7b21637065f3a9e55590fb09e9b81a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PEJMA2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5afee6b5fd916cd5d01bc230ef09b58df5ff940fa6ad17d8f0ec02ff5cfc74. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USDY42089997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ea3119443ceaa6cd3a25a71bbc6d975ff05ffe728b149cf30dcd781a0e4928. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:20:26Z), 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/USHM82026404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf3dbcfb63c1f8b682c1928912bd6829176e4d6201be50d73b5a8fbb3991e54. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:57:43Z), 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/QZNJX2150118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc8690231427bad0b2f535ba8c53dc6cfcd9a253b2d95bba6f5e22177689a8c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNJY2108088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c0db54ac1081e83fb7c37035f242c5b81c7cdca87b992961e783fe065c3f34. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNJW2294844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8078c9861a7c684c102e138296e47def28366a63bbbc3e0f5df9e314e64c0b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:45:39Z), 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/QZGLM2371924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3ae77ca27661cc6fb3177ac83aea74450f3157bd28e47707eb2816e27b9422. 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/QZW9L2419384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a22f9bf3ac3c45f34935161ff0aebf0556d6389a96483e868e1019f8751603. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJX2327612.