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 0x6dd2324e9118ba8ec1a88b2f18c679b701d07ab253021df4676d34bf85e3db02. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac043632-d126-48d7-9bed-c4762e91e2e0.json and https://artists.proofprofile.net/proofs/artist/ac043632-d126-48d7-9bed-c4762e91e2e0.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 0x0d92d0091acb9c7359e8fad0cca66b9c45f9e34cd02dd664b62e46e625b84b8b. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCAJL2555575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1582090a415ed90a073604e53ea9b938f002f8c985cdbafd6f9db583b4b1a6. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAJL2555586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48d583f79f1bdfa3bdc08e677f7d9cac736fc1282bfbc722581586863857c22. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJR2526002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8a0fe79c056f141b8e1ea3b52db99af246a75fd35ea75cbc21331d5c6af4f7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:30:49Z), 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/TCAJQ2526013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea368d8dd11a23027eedd6fd9f076f5ce9adfc17418cfccae539382cba6a38f5. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:21:54Z), 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/TCAJQ2526019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9c34b461b625769c350e64fb6fa966c61faf48b00cd856efa44401496f4a6e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:43:19Z), 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/TCAJQ2526034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd145ef96ba50e0b844b326d56585e33dee22b8d4b37690d25ddf0a2ced2c1796. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:04:14Z), 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/TCAJQ2526038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d0c435e4d0293aa18f195b2643d23226e597840e2e60524477cb20b579e7e7. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCAJR2526046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b62d66812dff22e74af3ad8f8e9f663e71772d41ebcad12b56bbaacef78bfe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJQ2526049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27b4594377e4e9edb99b409d074bf86ceafff4aaf3ee82e5c63ac647a5f7b03. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJQ2526057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6123787e82e7118185d304dbe4df2cdb55e6bac9021a5a94a46effc85de21291. 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/TCAJQ2526070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e9046f77edfde4b63380f3ccce567ba9135c1fa7ab845ff0814fd0441a9678. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJQ2526080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3de95975dc08717b31424a9ba037c77c393409119945f7906252ff268eaa574. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAJQ2526092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0de2c7ac5661101b5915e9075cfa9449795aaf84c88fd52f47eedf5150903a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJQ2526095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dc1c869b0e6a12e305bb7189a40632541775d43af3f5939533576e1bc2ade6. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:42:06Z), 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/TCAJQ2526098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3e5ceafe102c96351aecabd52ccae37aa085687f710c6968f2bfc7a6622d25. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCAJQ2526103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa56fad6e1f78e11409462e917dd4f93e91d7dc72e44b23d50d378884d09932. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJR2526109.