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 0x86c36fb7f2e56ec190a84e9e7053f10c7b309d47dd24c74114cf1c4fca708d7d. 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/70a15653-5caa-4d7c-861a-209a6f8d3eac.json and https://artists.proofprofile.net/proofs/artist/70a15653-5caa-4d7c-861a-209a6f8d3eac.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 0xdb850dc05b2397aa9f23a360afb3e8aba275720682cf8f181a4d6ec86c550b3a. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/PTEM19300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af9740cce3fefb4e069eab4afbe143e92aa82a8d11449833b89a7e183162332. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/PTEM19300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9ef308d81e1517ec3fe017c34df07101b0654e2520a37b3f5fb90c6b581ee7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PTEM19600063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681482029789e46cdf6349da9ad0ad3f6ee994f2ea6f72f539fb8601dde887af. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/PTEM19600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5a1bd3b7d9eb0853cf11e57f9ba0c11a549bdb892164b2153794ed68ba9fd2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/PTUM10000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13a208343e5a7fef640902c9635cc0bb724414485014a8278d73b5af6ca6127. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PTUM10000177.
Cinema Estrada (feat. Jorge Palma & Paulo Gonzo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cda7cffb84f2538fcaddacfd096c78121c4dbd9e0a93346bbcc9573f6c1424. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/PT0GK1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde265825722538c76716383465447c8ad0c9da07773107d4c2739e644ee6cde1. 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/PTEM11200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc9d0d1b05cb3a856c3cda7093ad28b34e17d0c40c9b7652541579d13350ec5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/PTFA10901104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a7e553fcc2ae894c5b72914e1335225338c231ffaa402ee5c7420453eacaca. 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/PTUM10200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6659cab6156ad292786b6a8e78a7c14e1446df6f1ee30f8f92617baf8958989. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PTUM10200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4df67e2db67a5002753cb30748c7ff8f9de4c564c8e4a3204d51003589a579b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/PT0GK1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43e33c5aeda2c4366d94e0c3724d87cc9c782118f16e0f9aff664d3742ee2aa. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/PTBM11700167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5647f3cf397d5510e5a8e0511be6ef4569efdddfbcb7f485ec29ac7c89a74887. 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/PTIP10800155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5c8e004353530b38e5ac869dad6c730fe78cd670e3e796a89ae5d1392e5915. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PTEM19200165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5c8e004353530b38e5ac869dad6c730fe78cd670e3e796a89ae5d1392e5915. 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/PTEM19200165.