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 0x6f7e37497c148419677f08824e4ab1db20c3d112559209eeffbb7954a6b5d04d. 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/1b36d9f4-0cf8-4417-b6bc-bd0cccbb0d45.json and https://artists.proofprofile.net/proofs/artist/1b36d9f4-0cf8-4417-b6bc-bd0cccbb0d45.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 0x0a2be379e9d5e4db0552babc0c959ba74753d05c095f702ae138a07f249b9110. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UK6822308656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b822490238b98d37d32f9f29f3929e20485827ac68148c9c3333bf89a73efa8. 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/UK6822313164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0a4387c57b8213f002d356fca758500c66ba0f5c347541ce6b410f401b6758. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:34:31Z), 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/UK6822315078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83075bfbae3ecbee212d2e926f15a880de3f2e4bed46495668055ace2202a8d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:29:33Z), 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/UK6822326893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6db72324d664f11095047c420040b5aaae9bb82ef077cf30118fa41184f5f18. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZVEM2386857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d6c51e1aef8bd6429c82bc94455d949ea8889e444b36c5d3a6c8ac0fd055f7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USANG2496281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25dc936eaf0e64eb99771666f02e833e36e463df03a24a44d8099ae5742a5e3. 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/UK6822420015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de803ecf303253717c977c7a616650127cd5514494bbc77c64cf1b64c297e37. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UK6822420018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98f261159b0ca818e09ce59cf74b3fef1eda0be137b4993f897829d2623bfad. 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/UK6822507144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac3440ac749ba46b887564819e4a9420ec30affe2b533eeb22285be9c59dd45. 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/UK6822509590.