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 0x37233c8e896bd650acedbbeeda59a76cb03f52cb6f318cb1c5ab6a6888db5ca6. 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/53e90b8f-c8c4-4413-b162-4579429a8ab7.json and https://artists.proofprofile.net/proofs/artist/53e90b8f-c8c4-4413-b162-4579429a8ab7.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 0x71279b014585b95193f78e2b3199505a45066d20a51136bc58b017be538fc36e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USVB41200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2118362b55a5f51c38233651bec1cff82978bb98a9b12437afa50170d7925a31. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USVB41200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1bc7c2046c0323e0fa5d90acd393304403acac0978d336fce2529f1fcd7885. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USVB41200138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf358c21322be763340d951e8f768838907c35b4a3fc8ba0215863758d52604a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USVB41200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46dad0d6cf22f4b3e090a6f280c76280bf683d700e6e86c82f4777ccd25082e. 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/USVB41200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1583b39b40af6cbe90631b522d5eaa219ba87328976be54c1325f5e1838ec47c. 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/USVB41200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb382fb8e5711b37f641007610e965a8957fc417b2267ccdcd743cca1687c97a2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USVB41200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2044ea6caf3ca609a22848160856d885b3cbea3f5b20126b558b837840751a. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USVB41200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf891d39516e7ba75f83576814a00363b2b61311a7a279ccfcac2ca09840b20. 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/USVB41200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1767e2ceb1f592d980a8f39279c69758de8598c0bccce8c9850b28902b4212. 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/USVB41200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192220bfa76bfbea161409667d0521103e21b4cdb50a2e0bc3f47ce0b0aecae1. 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/USVB41200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baba06355609ebb98d660a4a27c90647b738718727743534826f83ae4e69d55. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USVB41200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56818276a0c11773937a2969205d33dd889cc570cf8763ec8cc3e2229d39055c. 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/USVB41200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe1615012d4f2443ae61dd301d357bf93e1920e1d7697c3ead76f1f4ff17b9a. 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/USVB41200116.
With Each Sunset (Comes the Promise of a New Day)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e73aef4cba22c362aea0bdb395add39eeee9273aa8f275708d72f77964a191. 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/USVB41200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c6c4418c50b9e028ff175148cbf73fc278af838dad3ba0b818c045efc87255. 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/USVB41200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b221ad69329b9a1dfdf511875bb41f5a1f4699958dcea336b662baf1c47e2c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USVB41200119.