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 0x7140b72972ca0ba5b35a57c5fd8155e19b686ae8afffbe7356ff7b38d11648f0. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d862ce74-53eb-48a8-8891-7b272d165006.json and https://artists.proofprofile.net/proofs/artist/d862ce74-53eb-48a8-8891-7b272d165006.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 0x55a0d12104b0ebbba85cbbb179dc2e27528eb192874d78c3f13898489f08e1e0. 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/USHM21808058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bf9e6fff8faab0dfe5341e9eb9a58b726ea21fbb0443b8cb748be59fd5c99b. 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/USHM21808060.
The Merry Misadventures of Sister Mary Margaret
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c65c886d0efdffbe0023914b78ac8a3bccbc6f0cbbdc90958e1473c24cf4ef2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USL4Q1967951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad8f930cae2d56dc8ceb72062096fa728029837ab70ba17f935844365c1118c. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:41:35Z), 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/QMAAK2026181.
Old Hag, You Have Killed Me / Dinny Delaney's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682a0cc069892662148870cf4888cd71cae4e2ff79295d137a504cb7a0fa927d. 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/QMAAK2026182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b120625a994d6d3684d4ba422ecc1f6c8594b0ee42b126957b4b81eef3e423e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMAAK2026183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933e734ec46ae37951d942da57b3c0a4e74be881fc04d0d1fd7035a5083758e7. 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/USCGH2198218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7c8ee30bae6e9dcd3f4b9f567c1e54757a8dee73af07b8d0453710f92f0b36. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGH2455982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37439856d16cf2115bfc395108e284f6a2eab2138baf6c90510e9774e5541cf5. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:01:47Z), 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/USX9P2460705.