Ali ibn Abi Talib (; ) was the fourth Rashidun caliph who ruled from until his assassination in 661, as well as the first Shia Imam. He was the cousin and son-in-law of the Islamic prophet Muhammad.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85685dcaa41b268006e108185050a60b0936732ce19b7a7890ed4290ec528031. 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/028660aa-b793-4d32-9d1c-7ae831bc5eb0.json and https://artists.proofprofile.net/proofs/artist/028660aa-b793-4d32-9d1c-7ae831bc5eb0.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaeb95d07cb40173e02ca7f379d0d4d2765b7d0d66609c5881fdf4fb41bfcee1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:43:10Z), 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/USUR10111218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bc51fc9787d8a05e28b9e06768e124e8030732817e89486e220b744fdcd834. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUR10000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bc51fc9787d8a05e28b9e06768e124e8030732817e89486e220b744fdcd834. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUR10000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46e72c4c007e5a01fda25b527ff2829a24b6d33a0e6caa0c69420c3be8d04e1. 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/USUR10200368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76f098f423fec3e759cfa0f7c12fe016f0603178c7f3a82852884eb62041c26. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USUM71026183.
Down In Da Water - Album Version / Explicit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f53f5179fefaeee62b9b33ff24b3ae0926b06d9b4b09e149fb44f08eeb1c177. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUR10400770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4021e43e56d6b5c1b458f8135d69ba0883ee7d73221550644c50a8375dfeb3b. 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/USUR10301363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2921a3638f53508f0078c9abafe75d5629c6030d691e957eaa9f2f91ea4da30f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUR10301368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ffa56857546248d860eedc3a75eaede3df8aa0dd055fe721d043dcfde8f18b. 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/USUR10301372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46e72c4c007e5a01fda25b527ff2829a24b6d33a0e6caa0c69420c3be8d04e1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUR10200368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bc51fc9787d8a05e28b9e06768e124e8030732817e89486e220b744fdcd834. 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/USUR10000177.