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 0x3b10ff9e7113bbe522bbe5f4ca94bb5acfd6af734ffe7a0bc4e6bad567e20c1b. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87b2512f-0e19-4f57-b5c8-38a620dadbb9.json and https://artists.proofprofile.net/proofs/artist/87b2512f-0e19-4f57-b5c8-38a620dadbb9.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 0xc9a4b9466b19634413b7a6090a0586e9ec17a53882738eeb76e7c49ee7be8c2f. 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/USDY41821407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d2bae40dfdbd859c9bb4336bdc894a2477fc4832bc76e55ed297ba22d573a8. 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/USDY41821408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41a476e50b02529f1276fcbef4f9a5bb064e704f61785ae9ae95ca24152eb46. 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/USDY41821409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348eacd3c576f0cb082f3d9996eb05b01510b03c1ae1edd1cedbd96c697cced8. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USDY41821410.
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 0x8b6aba033a76d3df2c53184fc823eec14b216911ca8a06a3c5e187c6f74fc95e. 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/ARU6J1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd15c26ae23f61fec11011f1af3f1bf1784c9c92aa7f1059195dfdcd2cde0a59. 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/ARU6J1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc978e9603c6ae28ac38a68315b6a6295800c4d0fa91b839fae19689c407543e6. 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/ARU6J1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d74983572df7e3b7064e30537547e30dc5ead12ca9ef91eb0f7b2f385a69efb. 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/ARU6J1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae00b52157b0bec67435a72b4fb2f54832e1ec427070c7cef671858933598a8. 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/ARU6J1400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e4554be1e06731c2aabd19ddeac17da217fab2f486b52f8f0f1ad107628e5c. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ARU6J1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899aa5dc821a2e09d88dce52194e07bf25da2390e5222df62037f627d6240910. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ARU6J1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9e24979c3f2447c36d260b3a1bb430046ed604eaec6688319079278adbdcf3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ARU6J1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb464cc53c7ae44eee3e5b55423604b169c2ef8e048f5bd946832c66dcf801eb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ARU6J1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01070afe5ef0c6cd504017205ff955008dd32a6fd43a88f87a81600b4bacdca8. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/ARU6J1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab8fc8254d84c914d2bf2e638a8b995e9436650d887b795cc181c3981d873eb. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ARU6J1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486da296809985608371d54b2ecbc0b5dee0ef13cbc829dfa503568df6a8e5c6. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ARU6J1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa7d3ea9906e18d149f216bec6d6117aadb60d11d3fd733a4ed740fb4f6140f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ARU6J1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4c9cac64f69a80f55816a23b9193283b2642e60f39e842deb559fd4c7e53a7. 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/USL4Q1868957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c1746b5a9b09c30b5ae1d8c522d9087a2d44e816943b5115653d1e6e845773. 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/USL4Q1868958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fde36b0509eae147e02d49271a9d414008dbc775c7e3ba9fe89fe2bfc6d7c7. 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/USL4Q1868960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871c3f21761dd9236b80cab03938230da5c2897e9675b4c9aa62feede25b6a10. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USL4Q1868961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60f190aca4b80e80cdc36426741a8142d816d3a3e927cc3a942f0589efe0854. 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/USL4Q1868962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0209d6c712e279898bf42d9e9429727606920d2ceb9d91ddacde127a0dc918. 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/USL4Q1868963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4495338eb424c5318e5b2b032f339e3ef4e144b3513163d83a60f5de74e5c7e. 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/USL4Q1868964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe638ffc6f24b7a61b5978a302b6e2fc7cd4a72766d8d9f52c9a838981fce55f. 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/USL4Q1868965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe3a65b0b3e9e33276bdc5ac17a933dcc10fd1036475c92a2fa18efef7576cc. 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/USL4Q1868968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd54f20beb08fbd17cd9098c67519a769ebd7aa9093edf6aea34cd81c8bb9a3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USL4Q1868959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722c58f0dbdd898729c6bbd98bb6ef91602521b0eadc479c79c0f3c753c9d29a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USL4Q1868966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5d58e162a2ee6ebb13b6ba5aacec99f373cad16fe51ef2b6c8fb6fc944f67f. 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/US6R21302420.