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 0x76b5669295e3942dbc0d421dd2514a973e098a1165f1ba318128700342175339. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da7124cb-3b9f-4117-af14-27e790311a74.json and https://artists.proofprofile.net/proofs/artist/da7124cb-3b9f-4117-af14-27e790311a74.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 0x48e74738b16deb946ca3569adf3cf244ae3faf5b4cca3b6d0fdae0cdf1a3e7f5. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEB330702608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7e0ac7f69ab3b33bce89f62641473774416e605dc343fa837063b4acb68b78. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DEB330282901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05ff7106186524ca98044236f9285d4822bab499f575596bca8b95e7615fcbb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEB330282902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b22d84752078cffd27a6e2a90791775bded7e20914db32c8bab265fefa7dd9f. 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/DEB330282903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02baee9d54ba1eda4e41eb96c525f7f89facb9d697af1ed01e57156882331aa2. 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/DEB330282904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f1f7c0caade6407c0b34cec234307572580db9976a75072c82b6eecbccbfa2. 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/DEB330282908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50b26070c81a5e182a8c93e52a459324c473b8e4992b9fd2458ddbfbdd3aecb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEB330282911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152412c87dc0e5fabc142756c2dea067eb6b9848c41b1ba8e7a09107da042ac1. 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/DEB330282912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f5a22eceea0d8ccc76cdb0bafaffa4deabe2a3805fb04833f5c3a26aaeee2f. 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/DEB330282914.
Atlas - Part 1: Personal Climate: Airport
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ed8961f65bf0c9b79800453d8820efe93048191d9017a93f96dc30b9155599. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEB339249107.
Atlas - Part 2: Night Travel: Guides' Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00d00d6e24a410f989b517655c6916ab1eaf84b4a9441f2aa8a5426935b8ea1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEB339249109.
Atlas - Part 2: Night Travel: Agricultural Community
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a25df3afa979eebaf08872f8a9dc4a55523401567871de09b89403d1ea9e3d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEB339249110.