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 0xdfb0abb426c28c2ab6ea8decf747e4c05eb59921f20c0ea18f89100233c4d220. 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/05b60b37-b741-4977-85f3-bc93e91a802b.json and https://artists.proofprofile.net/proofs/artist/05b60b37-b741-4977-85f3-bc93e91a802b.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 0xe5858799932531f8b4ece57f241a25d0c10f9216c74814644e5afe71ee5138af. 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/USCGJ1131409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9c83233a76d5eef17b58e362e45b59a17a9632aaa3dc24110b8eb0cebc86c1. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USCGJ1131410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288d84605c7ce8f6eae00d6129ef52d8ff530334dbf155088d7c20b4cf27f706. 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/USCGJ1131411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8335684223595842e8e612d94151f5c9a03bf942221de1df3ab2fe3373b423. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USCGJ1131412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190bd74491ecc6a19c3ea9b237ff6834acc9a8a7eafe6cb7c755c8811ef0967a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USCGJ1131413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7732b289c5c033f2c6444b768e69b3b9fe94c6d03860be2007f210e96b8803. 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/USCGJ1131415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d05c00368817ce3b6dd870e222e55569f87a94360b7c55717e5e1aa583ea79. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USCGJ1131418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cd5cd84e2c9695250d8f01959b20f016ecd5e2926fbbabf76ddadcd1de0ef9. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/USHM21345221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f1eb5c93fd9175bc1280969ec7d0db42fe2cc669b94e8a1df0435f169d1235. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USHM21345224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6751acbd8221aa18a6c6fd412910424575aed136d9187e9ff11e9fb28dec913. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USHM21345225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452767905a55852c9c63e75e15199f280c455eb2008bb48a1f3b792a4ad59f29. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/USHM21345226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f8bb17066f7a06f37c4f87475b8c24d5810af539fe0c2d26a03b8fafea86ee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM21345230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2744f4fecbc8a4c13906ffea054384d0429b9c8f2748e935aa4a9e6e90e2dad. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGH1592434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbd539a0ba80abc80068540ab2232dbbb8241af9ba2b41a6480e3ef3bc3423d. 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/USCGH1592436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96a5cd7eb5cda5a4e0a97d4b20fb513b529eb5422b4e85c2dc5ba07704beec2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USCGH1592438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fa5d9eee6676507405607190b5a077b42c5c09971f7358029c99de47a3aaf0. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/USCGH1592439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2ff9eede9eda69113e1f761e0c9110cb8b9c81ee1e20c7accc0aa114ad69fd. 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/USCGH1592440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0707e254f7bcfec3df0866f544d0d53bc081de93e79b3bd650cda9a02eb5c903. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/USCGH1592441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351e414d6a4ec789ca3bcf8a0d55fb5b4eab889bbf8b17cf5682ff15d52aa2ae. 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/USCGH1592442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98843cb87f15f69c71c0d7d2bed8e7d484dd3ea4bf4c942523b11aae7e90447. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/USCGH1592444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80f42ddcab6e43407f99cde75cd376bb4b65b4fd7e377db72a8516aa6c52ae2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGH1592445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7b8fc5c21748811609cf1733d80c27539174c5945be73c7bdc89ce9cad7fef. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/JPV501600156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5048b9111f1b9045d9fb090d36a7ace05133debe13d12401df3e8733b2ad787c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/JPV501800277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e06a9ac14c03a9ee89eb6692e8e669f36e34222b9bba89199da5d790e6536b4. 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/JPV501800278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12c54d5b33e7081571534a64af059b45f0aaed4e1882bed0ac4ae92bcdacbaf. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/JPV501800282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499c1469332b0fea5f303aa3579a36d5039d070bb624a869b0ca3fd27973813b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPV501800285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ed52abde91d6b605ac8bde6cdedbff20e02b561d2c6a4060a30b60fe09d1b7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPU452110018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ed52abde91d6b605ac8bde6cdedbff20e02b561d2c6a4060a30b60fe09d1b7. 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/JPU452110018.