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 0xb39d51cc5fcf147e20d5720831ae0b9ac90f82a1ed6a4e2dce6f474f36ca6694. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3685c1f3-379b-4d17-8d9d-258b17831d68.json and https://artists.proofprofile.net/proofs/artist/3685c1f3-379b-4d17-8d9d-258b17831d68.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 0xf829e485bf698742dd0ba3844d81c7133f99ed763eac2de4f89f00f7ccaa5374. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:29:52Z), 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/TCAFI2178923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca293d3aa529a6feb88234d62a9fbb7660d928242f792a297f5219530d0fa340. 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/TCAFS2124689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969e717f73a89abc8b36d60477473f96c5fa6136b00e6297c0c3cfdc0c2bf8d3. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZT6Q2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8753896ed20b4f3e4f91d39b25aa33f59b2d1312ba52c8f5fec94bad63fef0ea. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZT6Q2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8480b7391b80ff28ff0c795afecda69055b8cfcaba97a5edeca056fec79b451. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZT6Q2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f643815b4853649d22faaa73fc9b907f72dee24026ee33fc5069f743e0cc725. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZT6Q2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d06e61870564689bb926c579e9b2fcff4ec857a6cc4aa8e571e894e6cc27e9. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:30:39Z), 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/QZT6Q2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da0e025e890092d88ecd435dbb2d5ed801515b1fe01f142dc076599f9acea8c. 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/CAN112401549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290a7deb96fc45c0df68ec2be25f7f643bb1874c5a5b923f52a0078699684b0b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CAN112401690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da0e025e890092d88ecd435dbb2d5ed801515b1fe01f142dc076599f9acea8c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CAN112401549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290a7deb96fc45c0df68ec2be25f7f643bb1874c5a5b923f52a0078699684b0b. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/CAN112401690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da0e025e890092d88ecd435dbb2d5ed801515b1fe01f142dc076599f9acea8c. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/CAN112401549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe318add2fa383effaed44b2416f18913c9d7c929257883221eb1a0bb88f65d9a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAN112501984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400ccab2b3a3c15dc21aeb58b0dcf257a7cf1b90736459fc1c1de092bebf5cda. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAFI2178857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400ccab2b3a3c15dc21aeb58b0dcf257a7cf1b90736459fc1c1de092bebf5cda. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAFI2178857.