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 0x42bfc357e5a2da7d267aa81ce30edf8876f2ddd8a6251467ae71564ddc20018b. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa3a3704-1fdf-4f61-aa9a-731e7d123860.json and https://artists.proofprofile.net/proofs/artist/fa3a3704-1fdf-4f61-aa9a-731e7d123860.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lotte, das Huhn und der kleine Prinz Arun
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 0xa9937392af4e8fb6c7a56a0d4218ca42879456a04ce7ef2afd862c796bdfe3ff. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEYW82200999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eddc83d7b301c044bcb7d65db6675bdb547c42170c0c53c25ee7b471ba1319. 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/DEYW82207240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf196165d40b97dc8d3abb17e9f9bdd8cb4e2696b32d7a969f046dec1195b82b1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEYW82302934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6721ab2a7b081b776eb41bfad65abcb89f16af7dddc4d89431c484f7a6c0f0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEYW82304901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef404fe0104ec5e90cf14cccf074109ce4fde45f1b23dde82c3bcacf57e504d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:22:39Z), 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/DEYW82306604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcc3589a0eeb4721dec0e2106791938a25442f5af4af216b21aa079d3853803. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:26:45Z), 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/DEYW82402306.
Ein großer, ein runder, ein roter Luftballon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd320aaf1441773bda9faf1816a692cef5d47c758ffcabaeed6a8aaf21a58791d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:36:30Z), 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/DEYW82418240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd0686f458b54780b7b46ceabe54cb7fc29d59116a856511242473ab4e21628. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEYW82419562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962bced5c9bcf5a2501bffdfc14117c37b60a61b49df9b17141f39233afadb07. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DEYW82504334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299bb091545b10a3274cead288c704739e92e2b8054567aa6c446bf8cd13d888. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:08:16Z), 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/DEYW82505338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa974ed12b340577756b9c38bc0e982be97e67bb6e3f0cdaff451d5d10700ba6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEYW82506838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02962f47d57b624ab25f7716780af9fb928039a7ad261c716f1d5a7cadea2137. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEYW82510260.