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 0x47bd02bd3bca082e2f4578fc5e56f8e0cdd68553189d2c467e1408dad8e78634. 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/98230f89-4ff8-45ef-8c08-25cb50c5014c.json and https://artists.proofprofile.net/proofs/artist/98230f89-4ff8-45ef-8c08-25cb50c5014c.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 0xe7860a2048245761b631904cd4bf94f332feea6ac27679ff2816ee82a970bce0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCACH1531582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae0b117fdf6128a4be694369d1cf1c092995282436477021dfe6cf5e2ea3b9d. 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/TCACH1531587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea20c23a404f0e651e6b7aeb9ffabe82bc05a1941be630d22f79eb724267ba4a. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/TCACH1531593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b1418f6bc326d97081c04466dd02bf7ac4b9d499a3a426f2f89c14030eac46. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCACH1531615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8d03247695df8d11fcc37de15405c6b9c3b2feaaede4fd08ae5300c187f43e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCACH1531623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072f033acf656d89a5d459314c55591bfb1abf100614de2caba9eda26023ccd0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCACH1531625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9289fc188add8c3f9f0709494312d0c3357895c579e4428488baace2c461727b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:27Z), 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/TCACH1531627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4d79e59b05a24f0113420f4b4b402d590c15c643a73181c536cabb2a5eab7f. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCACX1765013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebcdc79b5628ae68ccf15f39d785e9876d8241d9567a3815a280dc9f295d6be. 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/TCACX1765014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc3480c3109ff994c1c256ccfa95d91ce01fdb16315feda509c68dd76c4daa0. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/TCADS1859777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b4dcb0ad9be1ca6e35acd4286af73ac16566a1f5ef6c067fad7b274bd348aa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCADS1859779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0471eb3e7878533096f94a3c1e46b8cafe3decb4239f0a2ccfc647285e581a12. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCADS1859780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf855d30b5035ec4f01f5533764faa0cfc6ba577d7efae7538149e3effc29e1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:25Z), 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/TCADS1859789.
Dollar Signs on Audiotree Live (Audiotree Live Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb047aa9a2d1ae78b8b6fcfd4ff7fde61ae7243ce2b0a27f2d9352485d499db. 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/USSTT2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9120ecbe1444a3af494b9587a9cada68603dd6a140509de625a0e2f25fa1130c. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/USSTT2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4493be2adaf21e083c5a254ff9e4678ce2e3ca7cef26d0465586c4243d21c78. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USSTT2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e2855ac624ccd25c24c78c7bd62225d71efd6173bdafabe044b37ec486f293. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USSTT2100031.