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 0x9f3d880e331b7c56497bc4b75ff54c0e6165035fbd1916b45397f0f49393c4cc. 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/88ad012e-64d2-4522-879a-69591c8f8007.json and https://artists.proofprofile.net/proofs/artist/88ad012e-64d2-4522-879a-69591c8f8007.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 0x9039660850d80d45bd6d6297b1925b5cd4fd28fd78955d7b85ee1139cb39a976. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BXKG22302713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3338099130327afbb98a1839962b06471fab2114a41570d6fe2d234a593922. 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/BCZY52400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5e52c547fcc19fd54edbbf246c2258e8ca78c7fb1a9869a9342aa2aa925916. 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/BCZY52400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4296149e0cee9d11f925ede167c02eebd643363d04219cf6329d30bd1d65919. 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/BCZY52400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6819019f73e830260fa3e2fc2010705833fa14fb0632a658f48207e3e0b989a0. 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/BCZY52300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b87291553a4e0dd34fe8839b806c069deaf3ac6416c98c1df67d6e1f8b9231. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXKG22400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3964e8678dfe0ddeb60da24f25b045fd0443973f0a1ece12639347c8edd01a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXKG22400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4756e697053682ecc61149d31c6893327bb1fbb0a8aa99e52b9b3a7885ce48ec. 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/BXKG22400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826a90c48155b35591235c1ce5f11f3e0f73286f636563547a56d80909c31e6a. 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/BCZY52300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cd4926055de538d6782d23e763eccb9af1c2b71fd84d0f329e6a1a9bd4078a. 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/BCZY52300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37df5daaa73f2acc76dc6471be19fdfbd5caf561ca64fcc87a0ea609e6dcb32b. 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/BC3PG2303800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0200ab72d1a5c52b201611d999a3797863f52692ebacde1862146dc08ce4b288. 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/BCZY52200133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7191985952752935786c7dc9497a69e47efcc88a85662d4a9f54f6b76b1af536. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCZY52200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e92f01c80a2c926527d456be319a616f511b2d384e56d694bb2059a29ba3a5d. 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/BCZY52200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3d0d798ba692f986c6258278543562b3cb57b3d25faa47c14fae1c1c28aacd. 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/BCZY52100014.