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 0x4988c3a6efa203e708749720413150dae124d041854e048f9cc69fa0d34035d7. 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/bbcdf589-d471-4fcb-b8aa-00508cc2d7a0.json and https://artists.proofprofile.net/proofs/artist/bbcdf589-d471-4fcb-b8aa-00508cc2d7a0.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 0xfeb0961811df57b2fd0035adfe9259e55f86699978b4a7171713879885210ec9. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/GBKQU1979197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35843f8be1c5efb77d0fe0d6461326b801a058a3013bc1285cf94764995f2792. 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/GB8KE2301842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134c5d41dbd753bb9c348e8a4e8d1eab3f096bd9044c0efeb5da355f285738d6. 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/GB8KE2306387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2370f39532ea6ca396355d0c1035a1dbc4a9155e02a2f83f1f19370f85e4d602. 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/GB8KE2307139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5a144a30968f0b2ca5e114e8809f1f4d7428512bc6b45cbf0163a5a134da21. 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/GB8KE2310564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404fa765ceb627fbf2aef6ad37215b22974960bf94150df379e91adbf1582fde. 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/GB8KE2408972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75d39eb32a69f2a2569cf8810a461c76db6c5e3a9bc04240573ab732958dd25. 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/GB8KE2411393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba7eea254a043cae16a8046054724f84271f81ab1fada49f2133be8d110effc. 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/GB8KE2419106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc300896374b63cb3df2b144f33eed2d4740d8b4df3a47fa74a80a1a08b5735. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GB8KE2423539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe82afc4474e778f9b98faaef3f1d627b731eaa4788d1ab05349aaf0948cc3a. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/GB8KE2506530.
I'll Still Be Here - Andrey Kravtsov Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05889aed8210bd7681a53a824aa6b7991372a3282f472324e313906635332df1. 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/GBKQU1790344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f52837e6621b87c0f41dee68af28ef02d54473538cbd80d57f04b7e023ad46b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/UKACT2160205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c67e06fca9595629cf5dd237e55be88de37e2ae6790e6b7b05fc0fa8e8d111d. 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/CARE91600950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3c67c5078aea203063c1dd7fe551454e134bbe93e2342de9d3dbc087a0424f. 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/GBKQU1756907.
Secret Love - Andrey Kravtsov, Monoteq Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644b48246d2687bc3157d53a82d49c6ecbd25a0f3897f038a8ea5958dce92dc8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBLV61506425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c67e06fca9595629cf5dd237e55be88de37e2ae6790e6b7b05fc0fa8e8d111d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CARE91600950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c67e06fca9595629cf5dd237e55be88de37e2ae6790e6b7b05fc0fa8e8d111d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CARE91600950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573d958a4f4a6bcb5e724e59700b85cb7e330e15ff9be5bbe271ee36d7061fc9. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBKQU1934636.