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 0x05595167ecc62ad33af138c18a76580a3b03490f2dfdc783165bfcf95d6c8b5a. 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/fbf08271-1578-445d-ad1c-bda78a57d273.json and https://artists.proofprofile.net/proofs/artist/fbf08271-1578-445d-ad1c-bda78a57d273.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 0x1dfd230cdb4fdf478867ce1828a20785ac637148ccd5ee1e755845b9b6a879a4. 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/NL5WB2300181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88463a6de20860661e3d1c40983c8c160e19e205c6352223c4e7c534a3d01b31. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL5WB2300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a75b14ac85dc5e82701067ff43c2fb53e9c25c7b4919f8277ca7765159a326. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZAKB2329690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b34645855bc734e7ed0d82e464446ed9d219af85c88d12c85f2aba6a3660ab. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZAKB2201369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6a4638a6bee9c2c2cca80b0a24f3691e72fcc943decd20e12813b15558a1e9. 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/QZES72295346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f8abc0f490420874104b4764a62ad0800c895b29fc607055176dcc95fb17a8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES72295347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28837f0edf27b8091f3a7317425010d37f2b1ade7a43baef3d4571975077e95. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTAU2102260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421f706daa4ec87b26e5a9372be989a44e2b3aba6f82457e030d38b109022374. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWW2150022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f693c242622ce12486f92191198a9b40b1045881f3663c78855f0399fcbdf5. 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/QZNWQ2142434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccf1ca909843da172a2e8343eec85f16cfb1c708f585160793757f4e7558836. 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/QZK6F2100225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeedd1aedbd086c86f4e148390f206533cb2cf5c0c2ab8624335152c214ee81d. 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/QZK6N2167159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c371ab63960e18f008d3866f47d7af80723e9c23f4bc49f6ef2c5cb64837f88. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHNC2185995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff16aea08bd22328859c2a09c498ab2f7f7d22177dc6008dbc27f5e819212d3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN72144586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a0098572bd7793340766b547b9be303f68eb3357c71d021ae7eeaf33b6ea9f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN32199636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36945cfe78b74b8d1d9fe67544936fe381a5acd4716c6baf384386822bcbd5b7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES92139362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bce09ebae02d3ab1fef8d84c0ffeb712c704514312840bad9c02726a5542e6. 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/QZDA72161352.