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 0x6c4622fc658773841f7c8d44d39a7f16b8df5dcd035c2e2a5978a05d65be1d2a. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da80920a-7a00-4717-8dea-e7dffbfb4c7a.json and https://artists.proofprofile.net/proofs/artist/da80920a-7a00-4717-8dea-e7dffbfb4c7a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alemannia Aachen Fangesänge V1 2nd Edition
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 0x13892f4fcb93d1608d8f3e4bb03ce091a32dd3d8108d760d36865c74023ff685. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBSMU2116924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebee335679268714acbeff5f6d53989d35085a7c3a961a8546bc05fb2b72b06. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:20:14Z), 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/GBSMU2116926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fdf426baba00cad819aad316dee6660c3812fdc65df3aec94881c80ac21cb6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBSMU2116929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9740ed66878a945b28dca7b42497d9e7a789cc6005950955613e0b5a5647ed. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:45:41Z), 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/GBSMU2116940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d4aa1ceffbdeb9ad352f4f723e904ec2005b686d479e7ba86fcba88cddceef. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/GBSMU2116941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd777c64abc0ce8e47e6bd8b88f4d8c5995092ef91129a282c627a8595fa6925f. 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/GBSMU2116943.