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 0x0b80ac82b6a40987445978df0f4b440a3e4571924de5d32bbafaa9082ffc96f6. 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/e98f5709-c7ef-4861-b4f8-4aa09f30f52a.json and https://artists.proofprofile.net/proofs/artist/e98f5709-c7ef-4861-b4f8-4aa09f30f52a.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 0x2ce6be372da0aee8ceab0f3de16b6481c02aa05ae52e86b0868c0f67dce04cbf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:15:51Z), 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/QZFZ62129374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da4abd86d0146d49d9bd514d0cc64bdcae155665a87af99c16a4f2bfb374418. 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/QZDA72160034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7220b69405afc52ced779f1d7032193bcd7e66133d77dd397bdcf5cf972da85e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBLLT2146179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b75bc97c3a5c5e8e0864f2addc52db9b9364da7a3f6db71d3dba14ae4ef121c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GBLLT2207481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827e12657added03dbb8dcea78d8988f70ee0e09442a3fc5023f5bd7031e468f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:33Z), 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/GBLLT2246620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ad1a3513a93d6922f19ca9a095ed86414e5341cb58e6ff33d1f5f06befe0fd. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/GBLLT2255094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ef04a7928f7446af3a29948033314d56b8859a3f069da7d6e7bcbd94311732. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLLT2308651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a214fdd5b8c2cb945c6df33e02521a21ab140ff79314b2280d4885d6aa53d2. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/INSD11903631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c746c20ec871f2163b82f5e93bc34e338f78e98d459366ab40afd266334243e. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZWV32342946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95f3561173d53fc3a0774eb80bcfdb37c84884958aedc17eb6a9824a5cc88e1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:44Z), 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/QZWV32395114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b6723b3d94dbde8b3fdfa7b1798955d085fb06c0eae5de72f5bea01491f728. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZZEC2307335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d1518de3ab020cb8dc6e18b75b96e85e6cbd72d7a4e50cd2390194f999841c. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZZEC2460486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd0c6df00147bd647af51170e37d04e3f311d3042b612a7e555985cece0bdd6. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GBRKQ2596410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7691cd823cffde94350f1f68cc61a6f0a9930741a1cd2510696f6b01d44fb2b7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWV32516027.