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 0x7d61e9d55985aa71324c090d8e18a5a901f3eb190fffbcf4d05f02ad4365b218. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9310b375-a004-482a-8543-fc1a3fcf9af4.json and https://artists.proofprofile.net/proofs/artist/9310b375-a004-482a-8543-fc1a3fcf9af4.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 0xf965a16c28d4e74d245bf29cb9c3b779364b5b4bee576c872a7bdb5ea4cde9da. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/CH6542536880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0fb537226a9b0b5415f7efd4b0b658cf7fc079b2e992effa75c96d56b94cbe. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CH6542536871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1694e63198bde43aa6fa3ade9f5bed1aac804796fc4109c2c20990884152729. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CH6542536876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc8fc82f694c76748ec81767ca17dec79341a3bd28ba7016352f12b50f6fb3c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:45:32Z), 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/CH6542536872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fa2f9fb43513550669b96b9cea17604e1c41d611c13f1e6bb5ace668a8de0c. 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/CH6542536877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7aec5b291f408d7db1ba9c133ebf4b8f8a496fa64a60fc117d07db6b209140. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/CH6542536873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe03c93451ffb09ca5e0d3db523c060df72e7a4dcc8cbe7835fd0a17eebde2b. 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/CH6542536879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c57e29d4a3d24176f94ebf25e4e73a270464cbd76746cd04f19829ac69d827. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CH6542536875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c067f900df73eacd63f9fdce6870850bd65c1b3ea1e173d26d6a9d7653094d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CH6542536874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2820ccc7825e9507a84ff0583debe787371563b74389be513b480bc1c7fa5c70. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CH6542536878.