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 0xe7b3997d3ba948ba04c49f0efe292e51a835c19cb477db991bea1cd0d0f3f804. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3e9c158-e63b-4185-b098-37d5a6ce9954.json and https://artists.proofprofile.net/proofs/artist/f3e9c158-e63b-4185-b098-37d5a6ce9954.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 0xf525ae07c7110a4f6ec6b6e30730ce52d7bd65203fdea7f548f4713e602aec33. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:57:03Z), 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/CH7812418679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefe6ce8dedca80529bbec9acd08be26e2e207fef7f6cbde646daf4e0211fadb. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CH7812417559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe520d73c6606859daf31c76091db29ca2e670c7f92f382f9bfe7a2866c03fb0. 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/CH7812418281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f3ed6c05f372c5f18e6b62bbf8d0bdea6ad24be1fda24a2413848fe4a2daff. 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/CH7812418683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd620ea01dece6981b620f80109f751b3fe743697285c29e91e18fc3616b1e5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH7812418681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce71603d16f720822b63556c2e68e5eaa5b43503cd697add47fd70f909efd96d. 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/CH7812412836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7352054bfa3645b11b5beb18225f6f270a89ac4d01aa42a39e4ab963fc0073d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7812413298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4086f866118bde4dd1f07b946abc44dc50a3dd4da979c6c0b66407cc2ad0c72. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T19:04:35Z), 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/CH7812420069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe520d73c6606859daf31c76091db29ca2e670c7f92f382f9bfe7a2866c03fb0. 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/CH7812418281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefe6ce8dedca80529bbec9acd08be26e2e207fef7f6cbde646daf4e0211fadb. 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/CH7812417559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5659bde07cabf876967f147725f085641080c062dd8637c1bf38a29505d7edd9. 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/CH7812414640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce71603d16f720822b63556c2e68e5eaa5b43503cd697add47fd70f909efd96d. 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/CH7812412836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7352054bfa3645b11b5beb18225f6f270a89ac4d01aa42a39e4ab963fc0073d. 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/CH7812413298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547699f126a3bf58427a0f40903b31ee0141141f262eb5e58284fb28b91b3869. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH7812406181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe9ec8e4ff679f5adc45b176d51773f54ee96928d6bd840073aabf192958400. 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/CH7812402616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd592a47938d86240a37f5c3e13bba9fe4a846e614acd3c1a0d2453492aa7245. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:08:13Z), 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/QZWFP2362698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9312c048444c25502e35cf7a0238f03a32159301b3e34be29b0279652a354f5. 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/CH7812351107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f002a3bfec8833d9e880f145326a24f85bf26972ccac60ed417b6d3ebbdfe68. 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/CH7812347290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c15bf5cfa13da87258a01c6fd96736878a7d27cb7a1a6093bc68c4fc59dbe5. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/CH7812342145.