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 0xdfc8c9f9e4b715335938d2438b49ca70e05d0e683e00d8dfccd245218d554fcc. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e46697a-ec09-42d8-b708-022380014d44.json and https://artists.proofprofile.net/proofs/artist/1e46697a-ec09-42d8-b708-022380014d44.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 0x7610e27485e24bca63219f9ad1b9a46549e46ef3aa323337c848a19c60e457ab. 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/ES75E2400448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6113d86d339483ce476f3bd41388d2bd6ba43ccca375217c25df8dc54d2c3f6. 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/ES75E2308408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fa902f96a4ac823697869f318aec72710aa6dcb80184a6e09aba16551a9d0b. 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/SE6I32455152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22424e1583dfb94e0ffaeffe4c44df94481f9f8ed681106d895757e10d026d1e. 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/SE6I32455157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5551dcaec266cf89e9f33155cad68a9208d8da56842e80f914c8ef88a3c4591c. 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/SE6I32455158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d490ada657ccc4a91d261b887aeb960a7d6b8af2a158cfad03403d7610122c. 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/ES75E2414785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde856ff213e9f96a59554750675c9b0db49b7843dbaaa7dedc19ac7180a56e3b. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ES75E2414786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c61085abc79a39cf1e38e834244fc23b508164d771e155574e3d5434c561ce. 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/ES75E2414789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6113d86d339483ce476f3bd41388d2bd6ba43ccca375217c25df8dc54d2c3f6. 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/ES75E2308408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e77ba50f26618d6a946d2edbee9d71e388757cb9aa17c25c09cd7e9b6a5d8c. 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/ES75E2503224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ec03adaf2da6d1475d9648910ec0bcfa27749c74c20a707b717f1ccfae31bc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES75E2503222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d2f047d090936b5f402422383fdc5b3c74bb49bbed3e4301fd443d102cdda7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES75E2503223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5514c0a877d8225bc89812a24176b8db4ab51150aabd1401cd1d611927b039d9. 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/ES75E2405883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa3b7b05856047cbf9ad1e0473dd4ff708833f4fa6ed1e50aff56aba449e986. 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/ES75E2402520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2453ba3eb25174f1fb7db8bc341338b8f2b765a073a4fc2619609263dc4e3853. 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/ES75E2401145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5946b4855a1297655020aaf76f398cd5cdc3fd1285cf2b37c78f55c5c453e2b2. 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/SE6A92383919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbe85d2e7236e596a1f0c50b263cdfca0ab5d6a2683a55dfe73181dc7875bfc. 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/SE6XY2321374.