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 0x4d3d34445a87d38641e7b4b99283f562b023076ec159e97238a460feb5b3a62a. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cc77ac0-e0e0-4246-9d84-99ad4e2bc1f1.json and https://artists.proofprofile.net/proofs/artist/5cc77ac0-e0e0-4246-9d84-99ad4e2bc1f1.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 0xe60d06f4ad40c3e7ae573e85b9704a114e6f2f9b93c7a5b4e9361c06aee5000e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:28:18Z), 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/QZHCR2200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd689ab29169230173b0b876b5c23f70f76690919e32d6337d2a38a8b9b753350. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZWV32417234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6349356b48ef11febb9f52e8c417940e627b366efbd54b02bf77916d76f9f7c5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM24S2500897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420fec37d45887ced67f00f428ec5c7aa0d51b366a621ee2481cfa8902ab9c3d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM24S2501782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6349356b48ef11febb9f52e8c417940e627b366efbd54b02bf77916d76f9f7c5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QM24S2500897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e4cb658538892ecdb7ea35a39a6028aee16ae1ad6ea6e0138c0b0b1999189b. 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/QM24S2501780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f200286eb0c01a4ec9a3e3224f0f367478b9532d914a99159fbacef5c34c1c0. 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/US25X2203791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758322f1ca9b3e7aefd01f66b34680573eb6d7f45355d595cc55eb5cdf5278d0. 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/QZWV32471208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758322f1ca9b3e7aefd01f66b34680573eb6d7f45355d595cc55eb5cdf5278d0. 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/QZWV32471208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8902ec0d6ca2ab72d1d592ba591f2560a85cb2223677e0d8a05096a28bf4799c. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:00:13Z), 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/CA5KR2315178.