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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a1e1250d357a1d1918abd280cdc907f74ca4555a2aed35cedeece66348c3c6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff244a01-9447-4e2e-b93a-b184fd5d9929.json and https://artists.proofprofile.net/proofs/artist/ff244a01-9447-4e2e-b93a-b184fd5d9929.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef2f1735ec548faf4c3d3f6a34b438513b9a2a6475d3e927e84ba3123d83b32. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DERI31400138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fee4beb5be8784c43b06c1be7fc65ff5ba0711658e0c20c137c95215680ceb6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2400396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52ebf1402392f74e1ad4f96bafec838367a5852c0166643ca70f35098cc5bed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLT2H2400451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd412d9fac869f7d870458378f491cae0c0ba971b4c2f26595a005610a5d3736b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DERI31400135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850308397babb4b01aa3e0797b91d290ee98f94461341769a0ddbdd4b8238f6a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DERI31400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565b7e6be06c298689b46548ee648f71ac6c3861c582722fc7095a65ee7715da. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DERI31400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdce54fd0ef05de7c299e92e2a4324faa27620ebda430c8c279c65ca24215d00. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DERI31400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3cd21cef2ed0c745fd0f36bf89cb819c666e40cd7bef6141d394f8d4946739. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DERI31400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2798266bbbd4b03f9837c859e97cfd5a2034aec3813bad653f72b3e7550f07e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DERI31400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cef0eb926016ef521b4dc50f3d7b812a51d7408faa57f98df4602c759030aa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DERI31400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91126623e1764c6506e9831e14981b84e372533da4f00b658f6cbb2282d17142. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DERI31400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba155c36a68d38023739f3d9e8efcb84907702e1f5cb4bd52ddf2ec76c1c227c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DERI31400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c6321970603eec69c58aca659a93f6bb1fe0e9b5226755edf4f2249d54e180. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DERI31400140.
sad girl summer (not again) [alternative version]
sad girl summer (not again) - alternative version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde33ae466f2544e18b58dca8ebe76832521c528ec7d3659d91d021a91bf35626. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLA552400563.