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 0x108b86958de82714b7e8e6a95d48266289a8e8ef9202ca151dd145ac5f2a4c29. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9f56880-6a53-4700-ab5c-ea0e71610deb.json and https://artists.proofprofile.net/proofs/artist/a9f56880-6a53-4700-ab5c-ea0e71610deb.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 0x84b683bdd1ada4a578d1b2474897bf659a32197a46d12e05bf1c9b144b569573. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USMH92336470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe971f5a82066cbd3e79e97829a0efec1c3fec6c905b07d47d77aa6c2a693f0f0. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USMH92336471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11725abdaf0ed8cd9813c38f1d9645416f48ca7ffa9943e171a4563c814e5e2. 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/USMH92336472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3bd5576eea5586e06ba0975b69d150dad3be047c32f9c223b671853554c034. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:36:35Z), 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/USMH92336473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32147bf2e1dbf9d9cc279a359960bec43a1cd4c153d3eed0d25cbaa36e72553. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USMH92336474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca96f6e7109f7c2ca5950d155ea96ee98a9e184c04dd4f7eb8443576695112a. 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/USMH92336475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f2c9bc2f9b08d00b6bc28b850e46da6e4e55ecc78ada1f21a5cc62b5dbe4e0. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USMH92336476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e488e8c9d4d38aed8964c4f74108148a85903c31e0097e17b543941fdc5fc6. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USMH92336477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6badb959806ff4c1f5ce5c05ac84f2ccf2307d35fefc3075a14e2fb1c8421058. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:36:32Z), 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/USMH92336478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89ed9a4ea3dfc3ad98d683e4caf907160e284f2acf91815d37ca53cf34ecf24. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USMH92336479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f324af2a5948c95e42e3f148cf145ee0075df8c5e52aae7d3762b57739339e. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USMH92336480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cb63e797c2904d91b55b46dc7c179475b96e5f083429262f26906d56a53e20. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ESA122404637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6d16756ea313d89b1f54110fdf88b7ef1077c01d3ce1b08cdda51a167386ee. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ESA122435774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56010d88ec12ad0a83149071eb670b9145cdab32c1c527733933ad1b181d83f9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:09:38Z), 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/ESA012401726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bbea2b726cb7160dc46d3f17c46ffc94e62294b7c78f321f46e93963b1a820. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ESA012401727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76824707c18908ac93a447420fbae2ef5bd796da5345358497cc663c1fa7149. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/USL4Q2544995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224856a05236acb349c115a4af2c161a4341657548e20502f78b789935825122. 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/ES71G1705446.