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 0x1a4162a687b37ab6c35f613e49b7c5ebc5fa1ae995865c24dccb9cdd9de50ac6. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e534d0d6-695b-4840-aa27-21e32d0ff2c7.json and https://artists.proofprofile.net/proofs/artist/e534d0d6-695b-4840-aa27-21e32d0ff2c7.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 0xd551a4ad671fcddff719befe4c1462e63a68d1aa4e171558c86e3b7e82ffaf6d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:45:19Z), 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/QZZ7L2500515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b6835b474ae1fbed30c8f15950202530da7a77eb7925a85639e64a74355934. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZZ7L2558256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c29e027a74c1d1e16d9478e439918b6ae87ed27b8c21c8054789ccdfcf322e. 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/QZZ7L2558198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8037ea491aedc76a7eed4e8857d7b8b3fce68991bea68e14cb02125669f9dd2. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7L2558224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e163cccf56fd86157d48753f5a44eeb77b62526de72e9d484a5a97563a9424. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7L2558199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ca4234076581b2f3fe2c8dd1a82488dade6518108e5453af5591f602dde196. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ7L2558239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec554a4c7be5d8be84b5e1eb21f947665c13d43a7ae785b4946acc93109ff2b9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7L2558240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb019a3ef0eff8ad1ef844de4a79abb98eaed53de371cf9ebdfc366db61606981. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ7L2558246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51001d80ec18aeab1e3aa69af6dc5ff196b2f62a00ea704a5ee0b4d4b86a1f49. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7L2558323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21155846cba6f677804087a6d8e0221b7f689bc1166661bc744a39af3f6d60b7. 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/QZZ7L2555902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e1a04a3d413f6f40763f635c1eb8e954d0cd018d8fe4a71ff3f1c547c830a5. 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/QZZ7V2598265.