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 0xac2d93da67b481b641e92f2ba8370c9f1710b56bd1ce65c657c37bf8c4539cae. 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/3733d5a7-a864-4528-94b1-0d5fca5be8ff.json and https://artists.proofprofile.net/proofs/artist/3733d5a7-a864-4528-94b1-0d5fca5be8ff.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 0x13c10ffa2c5a2ed148f2cd8ac9408e91aec2d736d1a8651f17e92897d51be1d5. 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/SEVGT0403517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e046f93a72ec675ec9706e4e75017cd64c638d68ffc8074e6122d874840cfb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEVGT0403508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c2bd0a04ad3d8687f8f13bff3be0104f6a05463777f7e36e4cc3c66040f23c. 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/SEVGT0403503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6b971eac58493aa167dfa8d758158c2e5a841f34bf4cac64bfdc29d6aee23b. 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/SEVGT0403506.
Barnens lek & danslåtar, Barnvisor - Barnlåtar - Barnsånger - Barnmusik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e046f93a72ec675ec9706e4e75017cd64c638d68ffc8074e6122d874840cfb. 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/SEVGT0403508.
Barnparty - dans och leklåtar för alla barn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810443d1c4294e4408ab27643812687caf7df5e6f40f3b737f5c423846aad761. 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/SEVGT1702201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e046f93a72ec675ec9706e4e75017cd64c638d68ffc8074e6122d874840cfb. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/SEVGT0403508.
Barnplaneten - Populära barnvisor, älskad barnmusik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c2bd0a04ad3d8687f8f13bff3be0104f6a05463777f7e36e4cc3c66040f23c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEVGT0403503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6b971eac58493aa167dfa8d758158c2e5a841f34bf4cac64bfdc29d6aee23b. 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/SEVGT0403506.