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 0x47970341eaed390f77e3bb337b914f0d40dc5a9ae6af27bf40e56c393d5198f6. 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/828d03ff-5f4d-4c66-b223-d94ee30f09b1.json and https://artists.proofprofile.net/proofs/artist/828d03ff-5f4d-4c66-b223-d94ee30f09b1.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 0x1180accbf4225ce03babf99358b7535ce96161c2f623220824085ce2c67a7314. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2212636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0ed81a96373faa5c5bec9df3a6e112040d92e21668d2f7073514f73362e0b5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJW2319695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fd19aebec8cb2631d6c80da39e8ae17708d565b8a7702e6bfd5b95fb128cac. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2339608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a01b08560d973dfa8dd1e796d5022c4b9f3dbe4bb5e73b29d9be329a3dbbb6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UYB282407970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8278932fd6205a39a15ad525be4f5745d0d24bb028a78156be3f93e49c4fa6e5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UYB282411630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7d653e4b864cb46f30aebf4012b40a939a3ed14ce35a7da28dd07badf46e78. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UYB282428114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93581e06d93004a1e34082251208c86f5fc403b659a662c6c7335465ee4a35c6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UYB282410006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5592bb8cf3b75b8720dffab6e4b70d91c38ab7a4e2db88fcc4efb2d79be3b5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UYB282410005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb370c4af978d8e892a3e6cafd380b3033600cb1dbcd1a42606b2857963a458. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UYB282410000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9710bdf05790fd8ab416433b9f34bca695f6198efd1ffe40b75cf3287ba479a1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UYB282310001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fbbd2c04d8bb041005b098339608d84389ce8eed189bc2cd2eeae7526aea5d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UYB282374010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcf14a816fad370ada613430d1c47f052e5ed24f56c260ff9688dde2a4ae76b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJV2311769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4253829c286c7815b50ac4aa8d90b430793b831bc73ac48c39cf052aad23670. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJV2311766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fc04dd6809a3d2d1df858fd01d82cc26a817604ee81ffc9b10c8c4cd93345d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2360631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e6721c219b37323ecf4ab62cc8f2279f061603d999ccd13b20170be82bd6b4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK4DA2214521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc658298234d5d415ab0fec59d001084af8f9f7f99407dbdfe8b261f4b3f08f24. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BK4DA2202714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976c68335b041399af9cde3ae806b6765ac799adec48b6ebbb2a3559b7d5cd3a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHZ42219070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33db7dd2a6c0781c4422441792e7c63ce3f5739ac6a4d8dfaac04a7cdec4ade3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES34E2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca91627e108af6ea973edc782ee106c1d5a35097d5c59d2eb93a778dc305583. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2262347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16db269ccdc9153d2a120ac5b046f431146cce75e3096ebc7168ec8de9c7a79e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJW2124922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1671d552dd179a2bb84d157ea4f75e5def088073cf65288b3162cc9ab4f49c5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJW2156290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84000699b4ddaaf10edface8be4b5005cd9da6a53c87cc4b43288bacfe7a80e2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHZ52164817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31accd21e647c086ac11a971bb903b7d6f949fdeb7de67830793a8f2d1d3abc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB2195080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b874a9fbdbdd1a869e56818fb85e99c599faccf8ab910daafe9d0eb08766d9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB2120614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05044e16fe7725288c2c057e3e723ae95bd2e1f73949adfeb777365d51f0ab0e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJW2034304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7d3e66fe9c3d5e0bec90bac579068be49694f6501922175a57864c5976c463. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES34E2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152f2147589bbf2f8e4a53cde137f93c9a6a566627d6010eff3278f6458fb233. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEN1917939.