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 0x8ff5d7fcc645286ad7796d342b245870306dbd54c43a25ed4f8a6d0bbd7cefd6. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb4b7658-421e-4743-a766-78e0d07d235f.json and https://artists.proofprofile.net/proofs/artist/eb4b7658-421e-4743-a766-78e0d07d235f.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 0x7e1712f73bb10b095a9464f8a723f354e209bdd98817503c3977769b8ce3e781. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFP2582118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fec8fdd60ef7aadcd3315f0bf3410744ac2fbf9ebd9ec466f2d67460c49f664. 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/QZWFP2582108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e05fc80957dd92c216f4b89a5545c5331bd155032797cc15b4267585616c96b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:31:32Z), 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/QZWFP2578768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d292a293f17f8d72d3f8b685685355e7e54117621d8aa9229b7e29bd5567e7. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZWFP2582109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed37b028bb79179e2581be61aa91d5287ae6da458302ef620e0e912a0fef4be. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFP2582273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d51b002c5559764067f99cb19e56b86f61e24bf758ae96101f7f039e42727a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFP2582198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c54c7808b7411a854dbe3da026bf39de7275c2284cc82fb472ce3133d9b654. 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/QZWFP2582114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12acd2bec3cbc23c1531566e4a11ae5941ccb3da573129a6dd8dfca948ff01e6. 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/QZWFP2582167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5302dee8fecda4e85a777151a066a6e2e6b90472fa0581aac464a64826cff013. 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/QZWFP2582111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c7311f9d8b5c7de172310ab0d8a126ad36c478d503553d80c8d3cd4554f5ed. 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/QZWFP2585551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0e113a86a7d9a46d77329703b5fc386e7cf9088ef5e63ccda676c9f31cbe7c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFP2582245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f3e18549b0c83da04312bf04e9de76066e7b4235bc8c3c7ececa39197863a6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFP2585545.