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 0xd59c73356b4a39a138e88a5e38a5ce17694f9bdb19a76c52fa79e7162334acf6. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fce38357-3688-4ab9-9311-a1096ee51c1a.json and https://artists.proofprofile.net/proofs/artist/fce38357-3688-4ab9-9311-a1096ee51c1a.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 0xc46b4138751bb3f918c1643a1c7e4064c2b9f9fbbe17083a233df4e3e9f2d712. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNWX2015370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33df8cdb42ed9133b9eb348d0ec1348ee308c1ce3003324c72a9ede130bf301d. 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/QZWFS2498160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1af4a501a479078bb922f9a86c9e4a0719ef958907c2a8ecf84b4dce8affb6. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZZ7P2426333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd530e67d829a4451b4d99c9e108e29299afb907caba96a5a2e846dae83f3f03f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZMEM2596303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ebc7409db61766a2506a5fc763542910cce566e849664da930fa8a322b5e32. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTAU2508105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae9c954e080b4a38fd51133b0822c1049b85b58b8bd2f78d9e2ceba87b29acb. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:01:30Z), 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/QZTB72559498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eda9355a5ef896ace71f48f3b8841bd640e39834509a1610f7b3378f566e425. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB72559499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2845983c2d9952780f109dfe3133b582875331382b34acfc2938acb0d704e2c1. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZTB72559500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481341bd3dc1d175b20509c2126d41a87fc5effbbff6b0318fa86053b8754149. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:40:24Z), 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/QZTB72559501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66431199a2af3807ae1954bc59c3be84f44cbdcebfe727b35422e0fad693a536. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTB72559502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc153489104cb83641e37f9b9943a5810676d47bd7fe78871ec52b0ac6bf4c5be. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTB72559503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780938a810020889ba1c84bbc197b90aba3181dcac2d9b3a8ea87c6f09702078. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:01:10Z), 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/QZTB72559504.