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 0x62c18bbc46fd2e66d1fbf831a591e66d858b79014c147b32d874c852ce00d272. 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/061180e1-ee6b-48ab-877f-8fb16c12094b.json and https://artists.proofprofile.net/proofs/artist/061180e1-ee6b-48ab-877f-8fb16c12094b.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 0xa34a5b838e2b05abf108344073b65e40d82f51d72379f28f655ea89b57a04f1e. 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/QZDYA1800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e269fde6a8f23caad672a666e56d421200b0f7ec7f98ebc7bfe9863ff721b97. 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/FRX202294761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d29b33d4e054dcb97fe418b49c8d0bba52efacc406884925c3962b04439a44c. 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/USSD12300295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a76425e80e4c347627ebe1900d56ae0d89a32c0666e1a28eb4f4c1a4541a04. 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/USDXS1600035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8bb98fcf79319a1696e2fd45cbf5db07fd60de7ce114042f98337970340db4. 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/USSD12000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eecd24ca511cdb97fca570451a849c88de65aed9d978210dc2fc36027177331. 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/USUM72015961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b11eb10ae4a2f21b80db0ca361affa358dc7468eafba6b933c4ddac34c00b2d. 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/USUM72008355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e89ba1ec4df072cd22c64533aa3a32427bb38d4149f911a2bbee85279ca2baf. 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/QM6N21907218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bfcdf386c35cb04fa0696f261a061e7fca807e2f31b8aec4041fe585a1de07. 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/QM6N21906551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9fa01e46e8c60a30d89401296da0508a5fb0d2cf96697255c94e76eb847943. 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/QM6N21906552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972c693ba2ad22cd0db044f6f3797b47bc282b4b5504cbd2e88866c12ffb4fc7. 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/QM6N21906553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f326ade6a882f9f128026a6830b79dc41f355d1cc5db80b769c32a5b3e3ce8c. 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/USUM71115094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8945d594494f68080eb7536d5880bae2c27b08a0d92f52d96a72ddffac12b099. 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/QM4TW1614836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c67bd1ee68dea09dd871aa96ca11699c400f118588b1d79d4fcc2c07e311b1. 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/USUM71709898.