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 0x4a967d2d56695212b4e1924220fa55eae45c6a412253dbc9c92fa0b4b61ef1a2. 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/a306c700-279e-4b8d-9a89-0b168f0f4daa.json and https://artists.proofprofile.net/proofs/artist/a306c700-279e-4b8d-9a89-0b168f0f4daa.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 0xa539784bd4e380609297654a2bc77173fb1910398c0a0c6b529c9096559916c0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRDVN2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc16f609b89fa6f69a0c953f0490e7e0ea94429fe1d677d74ce24413eea0c56d. 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/FRDVN2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3a526c37db7862136d8c2d67b748788a465e55fc3148a9f757b77e3488b55b. 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/FRDVN2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52e1978496cc49b2ba2a018f37462664c24452d3140c09f39a8ae6ea32acd29. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FRDVN2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b78a1ef44c3a3299de79f0b97fda70984ec116f78a605bd02473fea6da02aa2. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FRDVN2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7d9370aed0155b6e6a7fa5c0992c24b96fc4bef7058539fa5625cf59a783a1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRER52400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a54dd33227146eb64962109e97c048ddf3fca8c052dedc48b4ffa7edfbe0cac. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:40:08Z), 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/FRER52400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219ece91c80e3fef8bb51b56c4d4700053a50f4bcb60181421b26686e2c72162. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FRER52400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228b70da57e330c85a4eab1785ab9dc45f6f5cfb94c25d7b1cba91286122afde. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/FRER52400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e916adc651cd805f75a548f05dba087655084f61782819fe4c356a007b7ef4f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:41:29Z), 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/DGA0T2454998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a54dd33227146eb64962109e97c048ddf3fca8c052dedc48b4ffa7edfbe0cac. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FRER52400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7d9370aed0155b6e6a7fa5c0992c24b96fc4bef7058539fa5625cf59a783a1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRER52400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb77e29b0afa733e5603e2d408e2d52db20233db7fd113911896f00eeb4176fa. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FRER52400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219ece91c80e3fef8bb51b56c4d4700053a50f4bcb60181421b26686e2c72162. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRER52400013.