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 0x42b0b51dfd09d6d569fdebcd70cd770141197045c0483ec0ae8caccfee19c854. 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/075e9c45-b09c-46d4-b1c0-ecd2e6520a1e.json and https://artists.proofprofile.net/proofs/artist/075e9c45-b09c-46d4-b1c0-ecd2e6520a1e.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 0xf3dc8d023ba71ebd8f9abdd44d21a2872ad4cb30a041b427a2ad9e0eb588342b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:55:48Z), 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/USCGH1960021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eabcd12c72a42f884449c1b30e96e98065467349977257d784d58f1323e753. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGJ1987748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e6325ffc8548bdc38fdfd47f037914818e74618850b8f63e7f7699a1f46616. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/USHM21990752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d372324c55d873824efb11bad653f162347cceafe47407d08b757913b5a5d4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM81952318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e55f76e35cf45eeb6362ab9f56bd184c49af67bbefa2d14439e2c030e27965. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:22:32Z), 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/USL4Q1928435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0475aed43f65e62fb0e04fc11bc6473e6d14c777615d225eb20653161f5fcf. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/USCGJ2021624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd89a45e1718f72feb464199bf3e5b8aaa8b722c2577a82ebe2a6b2dccba951. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USL4R2058161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2c11a4ca664b7e50ee62f684a3b0eb06ec968942fab23c694ec3787ada70e4. 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/USL4R2058166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb28d1ac7058d710506fd0680521a3cc80199f94e56de1bfb4de424a967baf6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USL4R2058167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6263a68ef6fd325a7f491d047464137b374100917a69ba5b9732ddb3ae2cef20. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USL4R2058168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bcf92a23372ddf764b9c497a3ea59337f56733e7e739144731c6f82c76e821. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM82047914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0475aed43f65e62fb0e04fc11bc6473e6d14c777615d225eb20653161f5fcf. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USCGJ2021624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d372324c55d873824efb11bad653f162347cceafe47407d08b757913b5a5d4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM81952318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dc8d023ba71ebd8f9abdd44d21a2872ad4cb30a041b427a2ad9e0eb588342b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGH1960021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c814b9ee7f27c9eb09f4fa9641f495e0630fe81da51d9e314ef00be9d036ea. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/USCGH2144677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103261652039aeb664a51441b454592f94965fd088ff5c65ba6ed74c1119788e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGJ2173879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603074bfbb8508f4a16dee58003102d49f1fcdc8aeffb090bf4a29019713ad7a. 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/USCGJ2173877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97589218bfe286c9999f5d2dc9c032343f8d13c4326517949d558e983440baf2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USL4Q2105471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a32b9b4df97d83bc4bae045de053d6446f33c80ddc50fab1f48c78d95b1efb. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/USL4Q2168517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3fc7fe283513832e9e6ce66043d0bcd1f8f835a9266ad993001fd07f10ab93. 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/USL4R2127754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15736bd2f8520b2272d9b8a3dbdabf19125c1e8014f1d43a59078f00c37d90ba. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USL4R2127775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefde43e577467a6a23d2eb94535813e2554f9912785e5266aa75460cfad9eb89. 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/USL4R2127806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc9849587e88c2bc607501075502d455e4fb5024967c0e1cd18f41349d8e6be. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USL4R2127839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaa73659c6994a75c623cb2f497964c39962c4b087d837c1697b5a15df28dfb. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USCGJ2233047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd7b5648f2e48f58a1894e9d1e88f4f43acb80242feb370711450557fab166f. 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/USCGJ2295183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd31510a61dc72a8d3e4d4c3103e72844b13ae155ca93d78351ff587fad1437e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USDY42322058.