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 0xa0da42803860e767dd94ceb0d4404e9593ece28ecdabd7e60b92cef4ec69f088. 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/36520452-cb9c-4688-a492-f3b5ab7d3c72.json and https://artists.proofprofile.net/proofs/artist/36520452-cb9c-4688-a492-f3b5ab7d3c72.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 0xb083458539ac1332c94ab19d3f7282cbcb91c39cf9997c4031754499e06710bc. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/USJ3V1877179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07a3ca86203d7f6a70a796df45ddde2e5d53d0c4b1178efaa0b51bf7f064342. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USJ3V1877185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5041063ea3c94d021aeea09130361498b18b6562b2d5ea6146c9a7aafd8c1860. 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/USJ3V2014008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410132ce32d9cfd58e436505a531f9eb601502654671b62c7d60a83ec4b9af8d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USJ3V2014011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a170d8a78d658fabeee0191ef72997bbcb760eee7287176f3fd6c7207ac427. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USJ3V2014012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cab37bea1c718ad0b112595135719207492b752d25095a9b6473e59e9202ce. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USJ3V2014013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d6b192cd9d5f140902219fb2c229cf6189888a795dbacf59a5f010f3daf453. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USJ3V2014014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19a2005a053dd1256b6414ce0d86b1e189b1a10158f69c40f3c8292a722a7bd. 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/USJ3V2014015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159234894175d714b560d78e3ab7eb4898b2ec9486d291b1a478bf13d555da49. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/USJ3V2014016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1642ddc8a4db75fe8fe7afc60a7862043f5aae03a573d6ca502d64380755d151. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USJ3V2014019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f87167bfd0c169d5c3330a2fb132346d2e7dd6790684452a873c8ff0be169f3. 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/USJ3V2014021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed75fbc1643e356c5daadb5577a13e2a192af43bba25a900334ae289ee5735a. 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/USJ3V2014022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cd6f361bc4a358c47c5eb8c2eec6bdc49e2a0e10d637c6130094313c790b9c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:01:05Z), 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/USJ3V2014023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74a9fb10da98d08a5d515b9efcd07f53b4025e5c1fd702005cc984c3e485a3b. 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/USJ3V2014024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25baf1f40acc014ba9db93f795a7bc0bd4e7d17d8247d2c4624a8f87fd39f45. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/USJ3V2014025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2785f0c18603eb4214fc1d26697e6568fe1f0e9c49f5508dea7a4c6be3c2f0ed. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:13:10Z), 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/USJ3V2014027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac729dd2a2bec3842ec47809610c0c8eeb3f35c3ec5d3f9a1f2ac6e99cf13209. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USJ3V2014028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066e8095d5c9a813c87dd951c782bd24c794fcab12245ebc0227c09df2fedc11. 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/USJ3V2014029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82340e88a3ea6549a1933d9922015d3cd6668d2c798672d29ccd1d43bcbab943. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USJ3V2014031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ce120e7093701223f8e298c23b5ce61cf35efe9399a30c60af3013ab983cec. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:09Z), 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/USJ3V2014033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989b1ffba7bbc62d46928c989db9c53659ab467bde544b5c0140b2d9af1aaa19. 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/USJ3V2014035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bb505903096aa268167e8db2121059d2a57e718a6097c76bd14f68396f6f65. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USJ3V2014038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766fd88c8515fdbd88f20b83d3078b78487fffad85ca088fa6127a3c27fddae2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USJ3V2014040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea9723be4925bf66c0aa47dd645340cf0cc0656c518076728f42dddc6ebee62. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/USJ3V2014041.