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 0x3af18de43bf3d5e8ef0147cbad9b358d6deb5f44a244cb4cf7e5056209770bc6. 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/a6db8763-646d-4b19-a7b3-335aa7b90445.json and https://artists.proofprofile.net/proofs/artist/a6db8763-646d-4b19-a7b3-335aa7b90445.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 0x47c86ddb09355a09743bfbd29b4ea88e8ebb62a1856e0b396e5620e33904def5. 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/USLZJ1631378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6109735ef9ecb3227c34337f2f8ffeecdf339e0d433afcd67f6e7bdd0f9324f0. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GBKQU1420571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a36955ef6b2c3e2828bfe8c844a1632f0782d4de02511441f81677f81d0a4bc. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:25Z), 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/QMPKX1445684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eac45239f24988b28b81e9d6a23529e501fe65de9e14f3a937365b8b8241b0. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/UST8K1501579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a02f60e2f4a9d72f8657a54e4d54cd216d511355cd3e8cf5a4a9907d153d5b0. 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/UST8K1501581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde23ab92a312eb1e9b31a174a904d433cb78b5f5c924a14d7338e25d23bb0bce. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:41:52Z), 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/UST8K1529026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8d48c8734568b30e5bc7177cdc4df403dd2cbe5ed497a931f2c786bc982e73. 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/UST8K1580064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263adf9c41749395b9ab935a30d823bd9943019325d01580cb6719bf74cdea35. 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/QM4DW1670133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014d236557d7f1f6f0653b98f9250eb39b24d6a6a7ac785d70fbcb7be1cb895c. 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/QM2PV1650510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff20972f2421c1f4c7d2e544b8247456e68c759410e510d0a0e4f15413009d1. 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/QZ4JJ1626058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55db004352c68886890097bc3bca50b94e4e9d091526c1bb81442949d2876c52. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:50:46Z), 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/QZAPG1839222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948408c48d6590f2ea40bfbe5d01c3630fa14948362c103c57b260c358c62d0a. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZAPG1839232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4bb8d31aa5d63fe256a3f4e885dea0558925a39053afc92a3384864fee3d12. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:42:07Z), 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/QZAPG1839233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b542d5a148c9162fd519c602392f4ffb9bb5cf17066fdbb90863ce80deea3d4. 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/US5UL1355020.
Come Dance With Me (Stan Dart Starlight Remix)