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 0x9eafc7a96f507e5f8e1a242f36772305e0b8a87a88407632470221cda3f7fc5e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a44e6241-8640-4bb0-9837-0cb6afaff035.json and https://artists.proofprofile.net/proofs/artist/a44e6241-8640-4bb0-9837-0cb6afaff035.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 0x34ba6cbc453282545e2eb35a5b9e0f14cea004195602c0303d1f0e84fe35e523. 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/TCAEY2078708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f1e6c4f5a10f73b2c7c13964f66577ddc5353844a0911bc30f5e9cfd9faba7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAEY2078715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508a5a5548ae3d9ae7f7c7be55cf69947de4b3819e9081acdb64f1ae35594974. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCAFP2107935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f6a616d1c8fad0f09d0b72d8be8c93c8cfd73e28d5a7e39ac57973ac7c2299. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:51:58Z), 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/TCAGH2231112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f6a616d1c8fad0f09d0b72d8be8c93c8cfd73e28d5a7e39ac57973ac7c2299. 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/TCAGH2231112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda116159b7afecafbf8cc4652c11a4fbcd8d3c111d601b7f377afeb342093266. 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/TCAGH2231291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a90615de4eaa369b6624d96343bb70f167ecbbadde510d08bcb5e31faec6af. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/TCAII2492420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12ed604f1e21c9d65d390f507dd8dcf050e921ae3c86fd1cf109a51720796d6. 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/TCAIH2492437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401085d6b702d699c703005971c96ebca4c8e18065022ffb580667ec96d2fa9e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAIJ2492581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814bf3b5a4300c829417a78a5c3c76c7cc98f2fab5f2b9954f3cf2a7e3770699. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:13:56Z), 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/TCAIH2492599.