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 0x31be6c153a66d6faf6288c249f6f9d31ce1e05ffe2cc57579e8e3e861c25fe58. 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/d8e7416c-e34a-424b-9546-377b468af171.json and https://artists.proofprofile.net/proofs/artist/d8e7416c-e34a-424b-9546-377b468af171.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 0x452e4cc47c953a9e76d30f97a16bcd5cce5af341774df71ee9309b7bd26ec3f8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USX6D1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ac52814f9400f27d16829dc1d9ca8c695283e0e2914530aac9746355f2ad34. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/USX6D1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c66abde8eb178711793696f9db6090d0c41e5f1e70e444344ac4ae394747c76. 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/USX6D1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5054137122efeef864845f3135a2d611266d8a1d4f5b1109b51e9f533f833a8d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USX6D1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cb4a96ef3a5e33f043577468c31d67d85d27373aa509352d18f0f276cab127. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USW2Z1600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb008e9073eba634361f2d50f69477f5270833c6dfa1b50b6c2651b33ad6e93d. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/USW2Z1600104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa828745c337dcd2f0392a23e00caabcea67baa043590c1e4d459f09410aadd07. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USW2Z1600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873b2feb5f8f1d60a4de8628a55c48f844bf9ff0748dd80a5b1dd2d78a37ea89. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/USW2Z1600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7dc8e0f37c5416c36d56a101a7efa60e9fa4c3294e9b859314cf261443cc08. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/USW2Z1600110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa503cb97ffd548d76ee6080925819044fc53cee320da057d4c301ad5629defee. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USW2Z1600111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8956adea34b0e2fa0d4dab9670ffc2c50be855b2aeeb15b7907d21bf42884a8f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USW2Z1600112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9ce902bf808730ddc8d23314a390fd5d5cc264d6e4b2a5c3b32d2f40a6bfe6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USG9K1700701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0eca845379a052d5d45f8d636d096eb716c7a7509cba1c3ac3b9e9ada80877. 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/QMBZ92424117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fecd7690789d86e2d18f15ba85b65e64cfbf16578df3df0b3abeae5417b90eb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMBZ92424118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dba3cb84c487b49105ec0f8c73d4bafa002d3bc2ef8bbbf969c564e8e96005. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMBZ92424119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17e13247dd6e084630528c79789099fea925df37e4d1af8d36d966c60f7df22. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QMBZ92424120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184fa6c02f003a4a33586c94b1c3be1e0492aa420c3abcb546b13db71b4e48ca. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QMBZ92424121.