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 0x07ef5443256a867c1942c4a0ce4cc198733fd6bcdf497195a80751f7f4216b5a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88cac5ea-6d0e-4a8f-819c-516722e6bfd5.json and https://artists.proofprofile.net/proofs/artist/88cac5ea-6d0e-4a8f-819c-516722e6bfd5.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 0xeb5d47ea0c801ad288ed034dc44a96f74e0f495cfaa004bec1d9f869dfbd90eb. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:01:54Z), 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/GX38U2106579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12896cdf379e0bc083ceea5de3165abc73762cb455866fdf28639c5277c34ced. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GX38U2106582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7203c4a0c62c7690af5c4fc5e0041661e8a08ac135507732f0de32d4de482295. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/GBSMU9726732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78894795d561cea5fb480cd0fbb984b060f3b83c9554850848811e3db333bbea. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GX4R52188961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb827a3bf9fab5e91b25e30fe15497d9ee531af329994e2bcfd9a3494acf2d8de. 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/GX4R52188962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bc7ced802174af83913ca5cdc634cd9aa1e2269847a973ccce4807d932f5f7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBSMU0024115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a6db62edd2af28e4241caf591397fb5a076b047a055b3f59fc955e490a6eb8. 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/GX38U2252034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114c9320526aab3efd9cef768769796eeb3c62312419c070386448f5bc7cd6bb. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/GX89G2218500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9ffbb0f64ca4f0ee8e1feeec3fa4d141b683f28a54e575f35c498954817ab5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GX8LD2416533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabd822a5df8ff22a75920e78aa07d499d4e50371fd7b023a21b43e0ead16f0a. 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/GX5MX2461663.