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 0xcd81748d138626292ef5bcd0d42bc75bfdc734cfa1f0011950cb552da34e0375. 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/88481e68-2476-492a-b1eb-15557cf1c21a.json and https://artists.proofprofile.net/proofs/artist/88481e68-2476-492a-b1eb-15557cf1c21a.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 0x2b2f039fe2279f96c42bb8142751250b78c619139b729f55c1a912e9d16db744. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEPI82450243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daadce87264dcca6edfab4e5709bfdb4748652c2a4b1abd473fc5f719fbcf25. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/DEPI82450246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e2a429ff5faf89f9a66f05de32498af7a4598454d23a7def9dd1ab962f1f9c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DEPI82450242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787913109c1b0effb5eeaa3f1145caa003a1266d47fbd9bf867a377733308064. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DEPI82450245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4939568ca77eadb8306891d2e9a47fc92ca510be22dbdf966301a77cff11100. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DEPI82450241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1138a10033ed3951be78eb61b21b7727d522b5d5cb2a5b07ce3d7e3ba90208. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DEPI82451045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa53c72c4c880611c4e3e50b3037576b61e5176243ef123265358c48d1864a3. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DEPI82451046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75dcf16872e024d7d3501eed91a232dd22eed76315b9e2fd12a08383e636793. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DEPI82450284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d7d4697aa727efd52828a3e8f3fb696d90ff67e72a2104b6c0167a595d09b2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEPI82451044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7258202f3f9fddd4edddd69525e62c9af3bc0b9a172480fb5b2e77bfdc6770a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DEPI82451047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d7f58573537bdff78ae2e62c7a14243b4e6aa3bae048cd1ba0782b6811102c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:22:38Z), 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/DEPI82451049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebf2cb1930a20c75e42692067dcf9470de9d5dd19eee9ca1530054ca5d3a919. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DEPI82451050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0504d2bb02bf4fead6122b8d2cf8c0607b3969604837b4a95f0f39eec82d0b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEPI82451052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd653178e4d9801661dc3751d19244999bddea30cb4d7c605145c07da5ece8789. 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/DEPI82451048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae63b59df81efbb45aa70342b0186df0ab26d6deed21e633a368b9367bf2029. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:04:59Z), 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/DEPI82451051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bbb637119a8ee45318cb9b886042e6c563d4370f5596348350b1b0dec6f590. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEPI82451057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbaef456db178eab612c8ee05a86c3d34f0cd5b6bee8ddc3cbd3901c64955f39. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/DEPI82451054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98907ac60b880404b243c16b3309b589dd5594389b7c3b8467bb34a773b732f7. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DEPI82451053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49932cb093cdf314d57433447691237f07b8da9f34d78b61e98b1efc8955980. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DEPI82451055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5aabac950e8b0c87efca52e7d35de1947b775f50a9f95984d3cfb9cd39419d4. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/DEPI82451056.