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 0xa34a461901501e4023445afd394f1b956484d3bfdc074d6e28082b8350f2e22b. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d4abb5a-bee9-4ac7-a48e-d6bd7577f1d3.json and https://artists.proofprofile.net/proofs/artist/9d4abb5a-bee9-4ac7-a48e-d6bd7577f1d3.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 0xf62adef5bff117e6c8859e7761aa3fe1a0a390a343fb3e81894dcf331ec4fa27. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ42589320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c22c426c426662135d9df2410c02f0bc88a75996d61235a7cf631e0629437f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA52554433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21bf4f876aee4628bcd27206731793766f8547c5b2c052960a78082294296c1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:24:38Z), 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/QZES52555009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8880c7a30ef7eb24fc08d807cc4bf8f570238482d22c1077cc23acbe10a407. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:54:30Z), 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/QZES72505398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc46b9a06439aa3e747aa8c53b21c74cd902dfc5a54a4c07bb1c20423021b4b. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:25:53Z), 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/QZHN62516915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b5d93668a5f60bc47f6a0fafcea1749dec672af82e5330fe5b94a60e80221f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN62516916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4232ab97bf4f5cac66052673bd08d40a06a73a26df00109ce1f7d54b0cf2be54. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:18:59Z), 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/QZHN62516917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff740d61be37d46b466c516cfb2584b6133c5676f7f8757c255b52c2b2e45103. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:27:42Z), 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/QZHN82521970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4329b41b2ffb872810b0420ac84c204a1415169596e065d7e35cbd2b448efa67. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZK6L2531213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddd408e56150c21ca7e3050194ba266076b0dce1b27642672c505487666edcc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6H2510383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade5fef55fe2e27ae565866d9bffe7130034cce8e6a2fddeee4b88a119e4cbaa. 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/QZNWT2517959.