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 0xb0474cf0c0fbcf020f5e1b20a2189d57598badf06079d03f7a046e9e85856c23. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/155cf257-9cb6-490f-86d3-bbd817621839.json and https://artists.proofprofile.net/proofs/artist/155cf257-9cb6-490f-86d3-bbd817621839.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 0xf4efbc66ea5b911dbf40b566646aad7b2b3171cf2be08096fd198ead8ced2246. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BXIV82455884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270a36aa54ca35a782996159c30a8482dd0de7da984ee1116eeeeecddb53f595. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BC6M22408503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb6d995429da73e2517893599c00a86d3b28e314ce0f26c7238fb5c1a716c0d. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZTPX2525064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dd509e20d9e20989608a9e7ac82790716755bf98a99477014962170b00da3d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZTPX2525065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f69d3c0bc4dc54db7da790bc10ae27d6ddd10f195fab231b85572c0452cf259. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTPX2525066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc997011d5f90255f383c7a044f614237451d71e7ca48c38ef396b12a1bdbc9. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZTPX2525067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f24b746174104b75ab88fa42ad57cf817417c7fd9af3d421ecb8263f55131e. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZTPX2525068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06e79533d6bf78c9cfcfd70be296effea6dde4b4d06cddfd7a5d9e074795f20. 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/BC8Y92400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d69ce73aabf410e56da51193837a61454971962eac89a6a1108db1662abd51. 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/QZMZ92529205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa3f10e9fb90c33cdc5c5ddd7d0ff06154935db3b6a9580fde2318cc0c22654. 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/QZMZ92544397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe54adffddf9966a80289497a3f86f3ac1790d7a30394d0c4588492131ef8e43. 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/QZMZ92544398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae502ddf54daecfb186e2abe5e9f63d16f1d515ca57b437a5ed77a0db7fe7080. 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/QZMZ92544399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9c720d25fa4d9d58d68b08d9bd8950dd5f4ae5d6b0b403f5544d56c3c24d80. 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/QZMZ92544400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d69ce73aabf410e56da51193837a61454971962eac89a6a1108db1662abd51. 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/QZMZ92529205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a51d49270be359bda5e2344c647719c4102b4742fee68e394532f6a482f840. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMZ92544401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb206599dba2ca5c27d605ccc2b69cbb120a97cf86610086dc2c332ac383918. 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/QZMZ92544402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0490566d24c3566b08627f4d891a979f28282095c42a56f25bcb2b9419d4b533. 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/QZMZ92544403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279a3c15b6abd03d52a2d983bb2b481d3ec7f64ff38aa68e893080641384fb29. 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/QZMZ92544404.