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 0xca73c4efa5fba5f61f573a04d407db8635508ccaccf8105c436d863355be568d. 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/11dc47e8-b6de-4d0f-a7c0-ba2f6704854a.json and https://artists.proofprofile.net/proofs/artist/11dc47e8-b6de-4d0f-a7c0-ba2f6704854a.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 0x341ae05a6c063ed5d74aea6112a2d09766da1b119cdbf3e2fb92bf481868b9ec. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QMGR31927487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff71983ac92f3a25348c5c6118340db1650f13ce1d450ced8a46a29b150df8b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USUYG1366768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b93448476fcfb9824386d9a4b384ac6029e8705decb85d61553fefef823e23. 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/USUYG1370110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f977248ecc032d40d57cf19a5f50c104d71621fa5141aaf2774ca57d57718e. 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/USUYG1373536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8403e01fe8b20ab1a7b4697626bc89b707889ca266c0e7213f9f2dd0cd65c4e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZSYP2198644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e5f38ef0e2673b69ffcdf00e8e07c06f6fb186a03cf507573719446e71b12b. 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/QZTL92144275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858f90297930709958d47d088db02faa914120d6b50f835d1d4cefa71b96b16a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:03:08Z), 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/QZTL92132502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46662951774c66fcfd1e6cbc5e0c37d92494a97d3dcd20932befb2df0864d98. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTL92177748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786edfe338db19e2f7a0eae248c8b617cd6ddadec8b02350d249ca8a825cf4c9. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/QZTL92114055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e44840f8917084aed4cc77e7d97133de6cf4b15c75a2c2dfb8e51e39b43914. 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/QZTL92195010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e06867ea8059130580a6bf57756259b43cfa3bb91f8ae949d47844cfa9cb872. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZTL92180011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c761f4660431c03ae930246e73e8a0f469e177ad153de3a112ec3ec0555c0e9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZTL92185498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e5d2a406352fe5f8f5af3580a7aaa446c25a6c84fe545e256e337457222154. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZQAY2238708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe327791da860e902f8e6f2d0518d6479fe303ac877823310e71116bb01c68406. 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/QZQAY2229234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a629bcd441d3c7d18dbab8ae4fab882835b735f5b796d4f9a903d41b7e0a70. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZS7J2239088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8ec7e06e60fa07dbdd95f1ce85696625e0ec428479d3e91dd957c86e2c753a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:52Z), 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/QZSYP2272470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0433c675601c59dcf640b0b255b5d45de942126f5e4823f76d0d9a051a29d1. 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/QZSYP2229457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf308aecea43dc38ad0616bae757c2b401155d2c6b052ec5f42fd7f8e477babbb. 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/QZQAY2317162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59fc9fe6c6da9b494af28a2764195d6db3d2e173db782c77bae3164a9915465. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZQAY2324256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4128b384ec8118406046cab8cbfbfd65d614625c40072f58fe94241a8a1d1ca5. 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/QZS7J2312341.