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 0xbd79c78fdab5e15a4d1bf93829df02e799fff4f36f31a3add638a4186ece53a6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c058ab05-e54a-4495-9540-0779495bd6c4.json and https://artists.proofprofile.net/proofs/artist/c058ab05-e54a-4495-9540-0779495bd6c4.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 0x07aad917bdafa88b3d420d7e894a0706f87f0c6f7a72b974bd1e1b3b0b3070c8. 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/QM24S2303019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e26dcf7f4b34b1d880fe0661238fecfa4caea70707ee73b47c63a995f10b69. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-20T11:56:54Z), 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/QM24S2304981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e628bfd9866a5b2e76445e59fd902eb0114da5b904865e4c05248e3536c0a7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM24S2302577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e26dcf7f4b34b1d880fe0661238fecfa4caea70707ee73b47c63a995f10b69. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S2304981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aad917bdafa88b3d420d7e894a0706f87f0c6f7a72b974bd1e1b3b0b3070c8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S2303019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7e7c4cfb790264d5a587d634b25ee3e9390d2aa10a88d4dbf8036a55750fc8. 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/QM24S2400588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1e61060d168d111184e224468378ec49053bed40e5df85eb7675a91ec4d94e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM24S2308704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9327773d7fc2cbd70b77634ddd454c446bd0504805451e58f2267d05480a33c. 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/QM24S2308706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed427bd558ff21ab1bccf50c69e97c5c52b366382b62eb66be245ddff3a0880. 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/QM24S2308609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b01f65e3b630e58d485d946a0929308d3fb3b73fc86331afbed978cbb46edc8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S2307187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9e0a1e5633e6ac1829ce99d8e269d2466f60f41c4504ee0ec69c052a4995f1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S2308771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897b9dcaa33d4645977bae4d082c92f3b8a9387f8b4c21db2671f663bfaa55fa. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:38:56Z), 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/QM24S2308411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7e7c4cfb790264d5a587d634b25ee3e9390d2aa10a88d4dbf8036a55750fc8. 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/QM24S2400588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492ac65749c5d837264cad1229dffd8a10fbef73d8de09cebcb2ed5c9b0d8063. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM24S2402584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c447e20afcdd160cfec33794fd3450ccfd575d939a2f5d6a34f30233b46931. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:40:30Z), 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/QM24S2404033.