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 0x24830b7c1c732bff670913229773f3da958c5983a617065e054efc4fd105b2ee. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc39512c-07c0-4941-a04f-190b2cbfe1d3.json and https://artists.proofprofile.net/proofs/artist/bc39512c-07c0-4941-a04f-190b2cbfe1d3.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 0x8767c2d4c07aede3dc410766de357e54d374b745e26f91d1f83fd062d93b5d9e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ARHXW2200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0376d7193685a7ac0cf9d6d8cfaacf6bf201df727ac9edd8072be833fb67b6c2. 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/ARHXW2200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c37126bf1d448c1e0f7e8f980b4aebeed0a98f4519933cd9b493cff27297bb3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ARHXW2200304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a631adb189c967af2835194930b71206eaf5e82ce095c7307f79a7aa3bbf8cc. 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/ARHXW2200305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b54d309b39fd7f56f3d99fca462f265d5d2ee99f2bbe3f68b5f672e97a7865. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARHXW2200306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0d18b5f82ef734d3b080014a988ff20805bae562c5457fe0ff64fc91812ae5. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ARHXW2200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1200728aa2749c2d914943033ad3eefbeb548840c6d68743c156a7117a33c1c2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ARHXW2200311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299db8617ce3e4665e6af8d9be114e40880665f31fd8842f89d934def07ba9d1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:56:08Z), 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/ARHXW2200312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec90e4012c46ecd00b8e3dd7a97c1c89e9a9297f0d65c628bba10858339f56a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ARHXW2200314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d781e437b93f9b98f3750ab6733d2ebd081058e2d81badffec5c1088451591. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T16:00:57Z), 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/ARHXW2200309.