upright=1.15|thumb|King Wenceslaus II, crowned King of Poland in 1300, from the Codex Manesse (14th century) upright=1.15|thumb|Territory under control of Wenceslaus II of the Přemyslid dynasty (c. 13
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc305ec45ef3536c450211f1cad9656e8b363eb8451592731f9e86f9beff78ae4. 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/437e6c0e-c5c1-4ae5-9eb3-d842e1776a3e.json and https://artists.proofprofile.net/proofs/artist/437e6c0e-c5c1-4ae5-9eb3-d842e1776a3e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb97d2bb467ff16c74dc9bf4df4dd349f117c9e5daba327b2d590622ddf67a8. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/AUBEC2107323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f46351516008f6bd118081cb911b5c5464b814d12ca8efb41cea67eceb1338. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QMEZE1941877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d854071ab3193a2f8eef9bcd2c3f8005dbcc625195604e16a05a2e3ec16e3d. 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/AUWA02200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0199734b3c9b25a4db594ac59f1ab68aa757e7f9d5de904b45f0a0bdda253e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/AUWA02200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0b6758126a5828ca9a6ffacaf42a795d2447e32c7cdf17887cd481376f1731. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/AUWA02200327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d854071ab3193a2f8eef9bcd2c3f8005dbcc625195604e16a05a2e3ec16e3d. 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/AUWA02200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0199734b3c9b25a4db594ac59f1ab68aa757e7f9d5de904b45f0a0bdda253e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUWA02200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04e2887eb00c44070815a7672029a145af11ca6135f0bca9043ca78325ac79f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/AUWA02200333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dfd565a11acc7f5c72786b9c0ae9363405e5cb1d30283b9a6536b60eec0f00. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUWA02200335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d4241ebb20f74df0d3fd84eb30b8350b83def5e36094d8c5ce3961893b5a75. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/AUWA02200336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d1c943935ebf58697d7fb54034de36362e0697849eb6c0a0f0a2b2d3941201. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AUWA02200337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb42203ce3e52ea339001bb5e4d7e61bd4ac80b310ee01d9e15f88a2fa89cb3. 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/AUWA02201739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe39879dee87e17289be8a6f3f4c6a7e3679f5c26458c6763c54483e42f8b1b5. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/AUWA02201939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe97802eb97933cd0b2c86b3244f0ccd1f42fff7aca36848f9e93cc4711ad8a0. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/DGA0R2305499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a17d15990a7b54879040552fdd42986afc7505e9d7cc3867f5fce6be99ceb5. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FR96X2466951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81e0b8e252f2713704d72498f0ea57867b63d17d88f7ec913d1d8c8afe316c2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKXN22366445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8cba34a2fff1c8d7e03e7c875cd9d9f017a67a272ed9cd3e5d99c3a3bb3e91. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKXN22325225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f70c46857266730c18d04bad1f2eacc0f66b531aea9b8a1d79e4db440f9ff6. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FR96X2466954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e19ab06782e481a0fbfb3312c91a8776f21555bc08c23ce12027db1cf0792be. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/FR96X2466955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe97802eb97933cd0b2c86b3244f0ccd1f42fff7aca36848f9e93cc4711ad8a0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DGA0R2305499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecff697ac2a3e59976f24e74640cb746128e03000889ff2b25c96c15521978a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FR96X2466956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fc9e7c521fa2fac9ba73f2347961d35af5062a62a7a3f638b502e5b3427514. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/DGA092432230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fc9e7c521fa2fac9ba73f2347961d35af5062a62a7a3f638b502e5b3427514. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DGA092432230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c28ac2a454b158676c8fe0e2828873fe6fb8cb9b0ddb2e2786d9c5a8305793. 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/AUFF02300413.