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 0x9e245c951fddbfe85cfd623d862320316db4189c9c9d69bedc329e7b8a531abd. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80f4193c-cb6d-48d5-9938-c0a8e80b9d12.json and https://artists.proofprofile.net/proofs/artist/80f4193c-cb6d-48d5-9938-c0a8e80b9d12.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 0xd4c527fa2373c1e426ae4785e16ccc04bbcd830ca144b9616b8f76b9cb5a6726. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEUM72006834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42e61cc8075adfbe4d0baa63c6489133c57de8ba397ff7e70815081867b3f14. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEUM72201287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044ea0c5dd8b7198ea63042f00c5742f10ac165f0e88775280664360b479bfd9. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/DEUM72201290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529a73e17edf383451b50806c8bc8a342ba938df2cccb8339dc08dbbb395153f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:04:19Z), 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/DEUM72500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f3d973b68698cee10197222d800fc1b9886d749704dd773e962bf49e8e3fe5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEUM72500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253906c75105a158fc7d8cd1dfe37218bb8cc8682f98b23965e50d7e56c9abe6. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEUM72500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bbaeb5e4ab20ace42593791ba7589d0ba8e193d1ed5a67ff6de0dc2c58de5b. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/DEUM72500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ece04b040cf9241b8abffa10d0480d78ddf29f491d319380bb29c3e8d5e2c40. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:53Z), 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/DEUM72500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf233a7b532f378f48941fed2d763f28e8d1adb5de6a26cacfd3b951ca969581c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:10:42Z), 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/DEUM72500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553d8d94f7827e16f00471c560a4e50c2368dc4a0a4f8455e17f2b43f50d6648. 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/DEUM72500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06431f8510a88f574d76c56f9f04cd8c62bbab9819ab5fccdd4219336da8d93. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEUM72500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f90db76f3d73b0e23b7963e16fa838010fb460d1ef9a42090b16fde64700ca6. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:30Z), 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/DEUM72500115.