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 0x3d6ca1586e3763cda034e70962d3f6d445e752c300812edac7f638559089185c. 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/71ec360c-a49c-436c-9712-a3509093d3ca.json and https://artists.proofprofile.net/proofs/artist/71ec360c-a49c-436c-9712-a3509093d3ca.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 0x78561c6ed1dc67a0a4548f6246aa65dcba0d445d39eefa1e15933453c2303b6a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLAM42100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13c211c96db19e737f5d5b373f66046473113bfe8e423d9102e386ae0f92104. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLAM42000259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aed45c24c31cd39e49ea2d864bc1f8d9efbf839a6fd277b307a81816549806a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLAM41900144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b725e9aee04d77985bfe0c4ca0e20b2295b99d5006dca0a4abe209e858bf24e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLAM41800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3fb7c672007d1e7d15b920f2dfe06f826ba58c8fc543c37a3eac8be0e95daf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLAM42100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a35b66eab28e2680f86040f69f2af75de3b05a5049f5809f7388f1748deffe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLAM42000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb4c1646dbbf73a3c1df90f94a898461d0cef6d726a9f2d815e45e0d9d6c09c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLAM42000123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffa328372ff4a164a1d7ac71aead4c52f1a1aadc5c25ef00fa31c3970a62a6b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLAM42000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12311d2d149e1d73e9b7a0793f25e46de2d46fbc2fcc5d66f5bd04c2f436544e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLAM41900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa2cfd06f2c3845d7ecdbdd718421ea68388cee01d0dfb317bc13c201f3548d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLAM41900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e5214c3954551d8945d0ae29032b98df3ae6ea1bb88f321b6894335a80cc9d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLAM41800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf167a09d4bda27006e8bcc5716099b83bc44f22e427a3b50231a80c563efb99. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLAM41800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66ba89ec09f47a776f42771e5e996746f92d1f5fb69ea141884b3a5d8bf4f9e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLAM41700092.