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 0xb7bcbaf73b0aa24e32565b72c21c961cbbc44bd7aa422348d50e5e244eed2854. 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/9adcea58-a211-4f79-bf44-815e44392101.json and https://artists.proofprofile.net/proofs/artist/9adcea58-a211-4f79-bf44-815e44392101.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 0x28a19ff6e2eb5fea05ff785f1e27ce7f220dc93fce646ec0baa0eb86a7195d18. 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/QZFZ42296729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b1107e54535b1d1ad43ca2becdea4fef6c49f7a915668a005a270daaedfcf5. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZES92329903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b983440fecbe59e5b49eb969ad6f3bff4ae3615f576436f5434d0a7f7a46c0. 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/QZHN72357780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df3e4ba68cbdc40c79c65bdaeba872d0e906fb6468140bd0c940177f41b5c97. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:33:17Z), 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/QZRP52315464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71206eef16c3173030e8917f037a8317f36882d188ec169d3b7c6cba09fb7c4e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZTBA2371458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac4e8042f6aeadecb5be70276d4e9a5c68ffc7b3dab8a1c3d9989be60d9bf5d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZNWW2471520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242df1a44a9243838f681f7debd5a11fcf4031da24c23a0456eca392bbb16963. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:24:36Z), 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/QZTAX2403021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cbbebbe1ea5b4eba37fe4306d36d6640f766db4fffd0a79b3e8acfdd6ce720. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFW2527751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8216dac591b5eb1c8a9cac3277d18de1670392bc7e5faab11cbcc7eae55cb99. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QT3F92530936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1505b05fac8e35a531f22355e22c5e5cece1f6043cfd9cac12dbd07a5a0ecc. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT3FD2577144.