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 0x718094752c1dafd140e610d36be6bdadcb72c0ad41995c32606ae665c70dec7c. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5454034-d45c-4c7a-a245-07d1b9b6d70a.json and https://artists.proofprofile.net/proofs/artist/d5454034-d45c-4c7a-a245-07d1b9b6d70a.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 0x3e6afaab9512e6217146a1345c4b9e1f5a1c572e4f8b34fe4555286316ad4084. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/TCAJP2555211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea4eaf488b1424a1b7ca1dc7db8ce5fa70ab3ffc42275ff30df14888937f8f8. 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/TCAJP2559869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928683a87bcb9c2f21366eaca3ced4bb9e7fe4a214af8f0ebd930ce3a26b9554. 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/TCAJR2555065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec0e5228658c0aefaab8ecbd2d49451c4f4d2f72cd1e0df9d3ab0030d4d3bca. 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/TCAJP2554816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272f221d61fd132c41f72e92b3aa09d54c585e9463117ad929547648ee749e0c. 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/TCAJQ2555086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0481d17c7a243ad2142e5d72bf2fcefdeec355cedb768e0848c9a8842799d96d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJP2554920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fa991088118e2dea780580406cc242e91dec5b68baca4f9f86dd78a7d198ba. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJR2554869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35429421cdd669b8b0f8811ef298a14a29210501f878e6dd7c7a6b347eb6982. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/TCAJQ2559728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fdd0e673383ec80935b20566ac2a05be650330de543231b78f0ef8c973a8ae. 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/TCAJP2559901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eba56c2977edae66c5a1171031d4d1ef0dac31c4a50fea4c3e83288df9712e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJQ2560044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb925b9879c15e1dd686e220dfdd8d20eedd12c6df179921a720734e015edb5d3. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAJQ2554842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce169405087444f1e86788a9bba4b73b4a17235aabfce7cda682a0ace1425e8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJP2555000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a0e45d9c3be4b3bd8d774ebd702e8bd095401ace9c35966c2e8f52805a90df. 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/TCAJP2554936.