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 0x44761eed0ee0fee1a831d2baacd2a333adcac7197a386f0a669fdbd81fa21b70. 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/d2d7309f-54d5-43c8-aabd-92bf849f8824.json and https://artists.proofprofile.net/proofs/artist/d2d7309f-54d5-43c8-aabd-92bf849f8824.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 0x4cd1109876765735364dac65808cae3163fab71299b7139e901636f6a259c7cd. 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/DEU600400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395725134098f20927679397b4b25e8ca8f4c115825d6e99430e2272c5f921b4. 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/DEU600400217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe892d045f20a9ac8f7fa4b649638b188bd6ad924445a15f9f49306b9cfdce8ec. 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/DEU600400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8ca0cc10b678d80401c27f80c2bb8028886e357a086f5ab81762992bf97818. 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/DEU600400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f9f1db82a0120d0a8ccd696c0bdf93e410f484d85b592d06bc0d604cfe70e6. 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/DEU600400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b73872f1421a8ff56ad0d271715df974eabbee12f980e30c65d7f6afd571de2. 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/DEU600400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a751702ca858f1055d1617208002511500e071698a48fb23556df3aee6e7e6b. 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/DEU600400221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4176997e6a7958529db013f43a0f497a93d34e421e243832645fc117466fc84c. 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/DEU600400222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7babdea8adb833ff1654529cc2fe5dc00ba4727e92839dbed6aff8bd604e878. 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/DEU600400223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0777fed631ca49221ef72fd271e6fd85ebe41c893d80a0ccc0e32f99a3edc6b0. 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/DEU600400224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd051673ed5f0ca43a420be9e65010ec45942c63c1c6bf2a483dc0e3022774268. 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/DEU600400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416992431991561ac6d969b51f0a32264ac040975dce4f844dafeae82079902f. 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/DEU600400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858daaa5ea8a32fb9d2e2494c9c9c425a49e86280c78495c9c9f4c1365514679. 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/DEU600400229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8165595e5063dce97b441827d2e5f0c58e6d842387f7ab6217497be303d67b06. 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/DEU600400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd8e464755a04cc697dae993472c3460c62190a1f975ef7a36dd08254e210be. 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/DEU600400227.