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 0xf8e06ac1943b36e7b103700b72c42e9b9b97a36a529d54e9aedbea041b5ac860. 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/0d56e77f-6221-46aa-b067-b4c977557552.json and https://artists.proofprofile.net/proofs/artist/0d56e77f-6221-46aa-b067-b4c977557552.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 0x5cf92cabcac5856ba73d275be24103dee28659d9e0aad3de1fdbd3d2a37c0a6f. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/SE66H2300490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cadf020e1704b09d4535121fada93c6d8f14a3b6732e55da2b7734330e3d3ca. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:22:52Z), 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/SE66H2300596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0268b2611cb9f5b123d00ea773d532db971dd937822be549e7f288f9f7f711ee. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SE66H2300722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fb83f2622be1830b24fce60fccbe28bb096119ed1f69070f487808e6593b5d. 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/SE66H2300757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123c06325220d8e3d72dee4752ea2b6c30b796fae257a24550e4dc43dfe9e6ae. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:33:56Z), 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/SE66H2300758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd4bb457f818673bdc0e04e3b905ef1e9458b96d0b4c6cad881aac62b84cab6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE66H2300941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a0b779c24886085d1bab56f722a9c1ae1704c3ef6a2b3b49902dfdcb1609e5. 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/SE66H2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4972602e499655fa7d773a08ef2ab030e88dd054086e99ee880c7ad022eb88. 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/SE66H2300949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb8a8ff40010be2bcac18b6018a947c06443b4e079a8a0e7be027a5d30e555b. 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/SE66H2300341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7e4ef2093b7a9e2fcc8cc213413ff39c8947b1e0fd5cfb737a399dc58e5455. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/SE66H2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ba6c7b27d77cf5ee17c2b89eb22b3138b7b6cdcaa18420dcfc25335ca05dfe. 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/SE66H2300340.