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 0x9cc6998c7cbab50b164a48a7c6c34cbf3e6e03cf5151b1ac6fa645fe34b03a4c. 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/1b6b08b3-ee8c-4bad-99f6-986851b740e4.json and https://artists.proofprofile.net/proofs/artist/1b6b08b3-ee8c-4bad-99f6-986851b740e4.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 0xd452c35514ad5a385ef1682a5a3ecf3f0814d0c747b53fd5e78fa636dd24e108. 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/USLD91751792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03349ef4dda6c966bed532f8f758b07a7cfe2cdba144cc64314fb97583610d4. 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/QZLL92455047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a704abc6c04beec35285d6356090595a0135829ec90d1f45a129ebb12eb07a1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:05:57Z), 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/QZL382482606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b18fbab8b483dc716751de0c65e75fffe820b75095bbacb8d6e7c8eed4ab8b0. 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/USLD91751198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269cdb1fd91b50352792d839e7d3a06922915a9d68a926671af8f0127f510653. 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/USLD91749312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6200ca33190d07db2d0f6b8808464a258e3d32eb41814e14107cb3f7507a6d35. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USLD91748381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d277729ce3e5d60558d11352ed9fd5b4929089b6c69f8f64e8b316aba1f931. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USLD91746963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793902fddd97c7a1818c90103dc62984c2d4bd5ec8c8f6b7857ef28beecf65a0. 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/USLD91745560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50c1c179b9f974220c2b836a8e959222ff7944205edc99747cc7010ab3544ed. 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/TCAGE2204989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692fee7e5e0de6be2ca7468ac4e3ad3c53eb73065b2c1a7179c75932465c4f0c. 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/QZKDK2271512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00b49a0f44e96fd198349e3068c8818edea11b017ce5d51db144caf88e8a222. 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/QZS632226370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27778cd157d158f1a4c912a77246fb301005cf70d65d8a481cadc3ef45b065d6. 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/QZJG52269743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf40aaa1ff723b0483c06d0649bd53f5c92faba60ca519240ce223c4917cb56b. 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/QZS662118217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71843b0017d4b41ab6d170ae9629018b9bb4fb83fbe92beca017d33559730b0. 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/QZS632139914.