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 0xe8be6a2487c963f64f4bc46606d04f3bf4c97bbb0bb297742b92a2adbd769330. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/005d3ab7-be10-4533-8e88-56c2a93aa375.json and https://artists.proofprofile.net/proofs/artist/005d3ab7-be10-4533-8e88-56c2a93aa375.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 0x4b4b0268fca393159d198f2d63be8bd9cecb91619453ef3b4b7bfaeaa97e4ed8. 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/USL4R2315421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5a020c64b373a989c446fa7b6cdd43cfb905bb2dc3e6f04501d4402b537dff. 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/USL4R2315422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4dcc235537e9118968da0edd6245b5457363be65be8d68d70e9bf5fb0b7242. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4R2315423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30a58d4a612c60297cf81f323561a0555967c67da1340e36f4d4d49eaf44492. 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/USL4R2315425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4990e8fdcd3b52358c71ef784c81d7435f92cc0aed74ccf0e5dca2b9b41aa1. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USL4R2315426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2035ef4a548b6d5fcf28a7723c7b7c1fb091dbcbdbf9ac7fda4166571d27bf3f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:13Z), 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/USL4R2315429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373752e0c32d59a4669921954f0301e68cd11c32fad946555abc42772fe8f05e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:20:08Z), 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/USDY42418669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14a8cf58c81d343e4983551b6ddf1cd4ce02fc1722f5005b7aa49c3a9743b95. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USDY42418670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664040ded21b609e508522f608c45bae62ceba1ee047da52ddbc1c3fb3601b68. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USDY42418671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a930f11626fb20f51f562e7d4f53a9ca1edce483c83319e52dbe7b3aaab9385. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:32:18Z), 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/USDY42418672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e3ac7bb9b1d229df11b88132466af56980359bb40a10b189aae5ad4f13b91a. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:32:15Z), 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/USDY42418674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c8f827c1cd242373668cad868ddc9da064221b9d5de1c710a7413d567e7fe4. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USDY42418680.