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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067d75e268a5f3e9665dd597ba7b7c3b378280d8446af4ae566500491d655dde. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08b74bba-2aa4-4d21-8c20-400ee8cbe5fd.json and https://artists.proofprofile.net/proofs/artist/08b74bba-2aa4-4d21-8c20-400ee8cbe5fd.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe379250d7079569e4e5a4134c855ed4ff94b7e20cef30a15720dee0626bd4c3f. 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/GBLFP2591050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489ef22f65e56fe7e964200b73ad175f704fc542f5afaa118a9f1e1b5681d2ed. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/GBLFP2591051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8741f4ac488b5e6ed059cd734182fb84e973b99470f3273f5668eea466aeefd. 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/GBLFP2591052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2057998721d5909d80c9ad34a4b1ccaaa8d43386fd2720a0248123368e26960. 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/GBLFP2591053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2b630dc3addcfd3e0a7b4f0b5b9e56f86f84a8d325a98338a720d330d23ea8. 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/GBLFP2591054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccbc88df391378aabc48341b00f090bbd8aba5be03f2ce266410bfbbc2781e6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBLFP2591055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e81330e45410a3b2ccb9ccfbeceb3a9a29c965e052a811a320e33ce7f5efdf9. 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/GBLFP2591056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733accfd8bbf682a1d10a8b4d80f6d7ba0d3fca53a36d638bd8da25dc1b43394. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBLFP2591057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe219690d13f1401a37e85aa72a93bd23bece9be5c5bfa21295db087a4050a662. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBLFP2591058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a85e4ea9d3447288e1c863d9ec73de65188b24936daa736f810d0381c5bffa. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBLFP2591060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b43d57c8112962d0b30cb5850eb9b7a741eced44d2c31645881c8dd975bdb05. 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/GBLFP2591062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4d4dfa6ee10b22368fb1ad1baad36dfd3c64b7ac29acc856503e041affa4b1. 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/GBLFP2591063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4062e31d29e3b2f72a3dc28f27c5343771e2e243a3f3a2d2799ca3ebf5c54432. 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/GBLFP2591065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d2a63cb99206af0cd5a41f0075e052e7451a70014b8c91c3fc23b40624c067. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GBLFP2591066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe937feb5b4cbb94cd6385a805aa992a418870e926900c8bfd45b89295fc3064d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBLFP2591067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168dacfbd0da538f7896b86002651f830c7f95b54d16116db622a387b60a9be9. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBLFP2591068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aad6c49c7f94804fcf84b0bf5517345ac07a14347bd67c6f7967a708a95910. 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/GBLFP2591069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa127355a4935a5b61af0e32053a36dd2c61477bee459ecbde228dd88f10ab122. 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/GBLFP2591072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bb1c2a1ee0ee397e0540c7b43351747ee703baff7a9fbfade3cb3dd56f9ff1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLFP2591073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15219d5c03fc04299820920c67c04a2390d3b94a2584c63c4c74ecd920d6d389. 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/GBLFP2591074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcc07ce930c159f689efdf92d748ce5150736116c041076f804e18d9442b7bf. 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/GBLFP2591075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234aea18cb423a23efd473d4b8f1a05be2a1069d480ec578eb5043f967e78bad. 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/GBLFP2591076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619edc8f15d5911a7f76f79699839d0753c41933ee760e047588f9b36d61455d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBLFP2591077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77180eb80ef4c651b3ad332cc03f7384d4dcb67fecf8f9c9738aeac9d377a7c6. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/GBLFP2591078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade4210421f3104a4ade4758fb93f649636834ee2b27062ee85669d24a00a084. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBLFP2591079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e373e1fd1ccbaa6a3d5f418fb6e33f11b1d1bd6a9feb654a183dfa483b323cd. 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/GBLFP2591080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b2446441330a251effd441c33da386a577dea9cbd5f4b8d9af705efa22d043. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBLFP2591081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33bf766325a1d93dbe50abef5d80a869f9f4ac4934e30446b682ad08cdd0006. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/GBLFP2591082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760ad54990fb0c71381243f2ec49e484da36ef2f906e048953e7a5108bb4752b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBMA22544361.