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 0xb98cbc947b41d2e17dac56d1d0ef6f148206e6e6b9de6706f00d0fae0f63cd29. Chain 2 (Bitcoin): anchored in block 953600 (2026-06-14T06:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e386088-ff92-4635-8c12-89328f4fee38.json and https://artists.proofprofile.net/proofs/artist/0e386088-ff92-4635-8c12-89328f4fee38.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Highlights World Brass Band Championships 2013
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 0x3dc25fac0b1b5da8a173589533f44538920db16034d13d8995f2a0188199e968. 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/NLC351318901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18950fb7220f0df90d85c42a96fb88fb45caf2fd0cae5bb005090c313abe13e8. 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/NLC351318908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d8b0e7bd1683b9f093dfd74b9687a1548646da78eca1d256749aa51f2c8353. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLC351318902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fbe746238f0916934823bb37e395bb815e651732628b3338656d1c2001a2ea. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLC351318909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4315e96bf56199b7566084a61dd1c68da4970d04ad05a7b803a69c56ae74d2e3. 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/NLC351318904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390b404380ab9689b103c16aa4db01d0d6fd5f4d3886a616f39c8f7f9c37170d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLC351318914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e25aea8e3927af57ba62f102f4aa293afe67ce353f9132af3fd7a7adf7d216. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:31:14Z), 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/NLC351318903.
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 0x80169be6ec76f482e31d8fed80cbb5a7da917ff010ab3e192f17abc9802d002c. 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/NOCJB2400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c8209c6a9e4d2ac3d90352f9af94b66069c8e8b5933da7cf074f3457ff0ce4. 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/NOCJB2400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d25c34a1d2761300e11dd0b2c820525fe39c061e269271f4978d8d3fc70267. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOCJB2300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05510ff3c5c6e1f3167a9e1248cf9001dd2d14d472cd5db7397c888d14f2e4e2. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/NOCJB2300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c52b455a91d62caeb38b12714e46671925b048cfcb3541e4fe5881434d39908. 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/NOCJB1700115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c9a6ceb083b8ee06d1d86cda10533b99fe3b12a94e33376c8d89c9e952334e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/NOCJB1700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292b7e8c533480f507a4ee7dbf950acc5ae01d2cfa1898b035d13818dbeb69a6. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/NOCJB1500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c3b85bde479ff0b664ef0b1c8d6da1531fa5256e845fae4aa5c0e2ba62b98f. 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/NOCJB1800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ec16cb708b95102262f653bd714985e0c2563f45fdcc4fc554f2fa2492a29f. 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/NOCJB1800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd1cb5ba02f2da050034d2f2efe46b827e7ea7cc364c1ea9f617cff5b4a5715. 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/NOCJB1800116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0eb34203bad371d20129ea729058281791ef2d9cc17791b30d411fbb9fe40c. 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/NOCJB1204140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeae7a9dce386a0800feb1e112a5b544f35c04b79bcdbd47cdbe63f8e22d7de1. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NOCJB1204180.
4th World Brass Band Championships - Highlights Wmc 2017
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483b2f9f56bfef6e0385e60674f6477b1e3afbab9528e3a0ddb18023b0031769. 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/NLC351720904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f2da140961479b71397bba4821d7e7bf1481aa853cb6cb3d630d7f5d67e9f0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLC351720912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8204b592e750758c24dd7536d698e2e81c803330df1bd0de353fa61ce154a4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLC351720901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609b86b2b0a57f98e93fc22134ecf7a8e5fcd453d0bdba41992c6016b4750305. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOCJB1600115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20584e20666b044f864bfaef0f609508146ae11fb6357fa4979c44b824fa20cd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOCJB2000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a98927ea59b4cc03bc9c411c5e996b2471ec13c6e759d28d08735d7308d4be. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NOCJB2000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c4404c12ae432c100dad4578ac4a6f646f860f68b96a169c404f0c987228e6. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/NOCJB2000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a523e9af6acda9e5b5dda9738fe6eef94083e91a730ba254dc1fd9c9b660f2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOCJB1400211.