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 0x72240c8516f4227393b84570e460406c4835a388ec2a3851c1d685f68fe0e38e. 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/1d0fd1fe-857f-41fb-917f-8156ebd82c3a.json and https://artists.proofprofile.net/proofs/artist/1d0fd1fe-857f-41fb-917f-8156ebd82c3a.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 0xabe9636618116dd3f713ae920f5cff544df47575df7419fd1575f4b06ac43393. 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/QZHN62340604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ae351a9945114a6af7ded09a72eecbe5fd76572e24b46c7ea909b4cb82ebfb. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZHN62376371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f2c76136e1a083312ef2a96a8cbfbdd68484ed20c02c1e5b89a0c58e4aa7d3. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN62362393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0ef0fe6d1988f8f8a367fb11256ca20c4368d2241c38d3a2aa6e25e78ea23b. 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/QZMEQ2340982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72101da31cf81ef1aa3e4e7c63c12692cd00a7b35c895d9131d64f01787ac002. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZMEQ2340984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b0d646b6a48df7479e6b0cc870e15a0d3ed72174d3a5361b1b88e20c45c703. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZMEQ2339483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55bc5118c35961a84a7c01f6b34b1c8cc3a2aba90429e5d951b032679055688. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZMEQ2358737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06082978922f4f494a3a023fe6fe855b9699705e4438ae64d89d8af2098d6a23. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB42309588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1362500b23d6cbc284759de0b70c3ff87476c56a867c69eb16cad8a6571756df. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZTB92396322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949308b5cfed880f0676bc761e7bd7bf20d2614b7b44b287ea3ccf0b8605d4a2. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZWFN2366446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c3311652dd81a5e20c5b37a7e20536441a8bf921a20c10cf8a4aab1302ac09. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZNWU2480512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ab7a1a93f5a2a3a75a93e66caa60764cc784892ede310de745c67a13ef0faf. 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/QZNWU2481031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809e2db2b5cde7568ac3e5fe02aef4fba03ce3ac1461d0bf48048732c75ed42e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZTB72463297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3775f180b9ec8aa67b8baa6fcc6f5cf963dc755b5b1b8ac1c766c5890fd44fd8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFE2465218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739d2334efc2dc047b52536cb50b1bfb94e58c54a069957714807ddc1252a41d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFE2481243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3fb1dd6e92db50f2c64b3fd3e36ad6a30c0bd48f415ca3f8c0e2d32204eddd. 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/QZWFL2451356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909a58f03df923d2bfeb4167a79dbb3b679c3fc86b90083e71f13e89d50e1539. 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/QZZ7W2478785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f60e32cfbfcaa11d9eac431a397ac96f2801ba7d5f3e8f5735181328af8f3c9. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZFZ72529332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51fc2d24831eb402ad16af84d4a4067aafb283ab7f6af63a32150e843aa484a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZFZ72530452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0056f23d5b14cb46d4c852bf8708cbd6ecf7e6fa183bf23c7d8a62091d72a8. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZFZ42593547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf40ec58cb40af7253291aa910590859d9246cce4cc644945aa324cdd0d64ef5. 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/QZFYY2586564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7006b8652ba7209174b87492eca1c0543519e342ad53073fa2c61c892eb1883. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZFYY2587554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31ccc658059079109146baa49a11dcb462997902215d3f7b8a4095e03bfcdd8. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZFYY2587555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3461ec58d6b472ea21534e9a36fb64e9a20d1f6378e3a12a0baa75f082d1a3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ62564364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30562cba8a576db0753b98ed82ee36d967599bd29d464ef587e049c209024a20. 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/QZFZ72530498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6e7593864df020944f5ca66b0e4cef538374743258f54ae4336f28f7be958e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6M2599393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12afcc67db9e14a37dc82d9df772bfe5ac035641972f41aafded8d096e9aea6b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6F2557119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ffbe9a0ccd99abc6d5d24967dda79e3e2615200a91a8ee0267a12626fcdc09. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/FR9W12524668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa546bf94aeb13599cfb492781e4d5a9bac9c427f5c77d9fadee4b21cdb92ab5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFS2552931.