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 0x282bff516808abd515f7270466e854a33658459f81b8dea624125140a130052c. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e5b2dba-a31a-432e-ae5c-0e8e7e9dae97.json and https://artists.proofprofile.net/proofs/artist/9e5b2dba-a31a-432e-ae5c-0e8e7e9dae97.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 0xf9ce71034218d473fe0f8bf070c03dafa217ae29eeba3b6d77a3ab759cb4c2d4. 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/CH7812062928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabde6f98ff3e8dc5d2057d1ddb36277b657661840e8bfe1dcf278ab5464b9098. 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/CH7812064098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36236f8ae8124bc6fb5da6cb2014a521e56d9451293344e7a709169ac7c9904c. 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/CH7812070558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0378c57a8910c6922ab91bd167a285d13533c85d40a25e26fcc84d54d9b989de. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CH7812064097.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8303b4ace2121326c5ab5a9f5ee0437aba39fa1ae071723b260fe66674db64ad. 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/CHD542200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd654666117cd8d5d4755a7699761255389e92bc4e458fa78912909221e419212. 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/CHD542200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a02472faca052cc64ca0637a5b4951c92d8d4096b01cd9228f5c0b15c5ee69. 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/CHD542200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25123eebdb8e258746c4d73b8cf9e06ff08730708bb0436ad04e66aee0450c2e. 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/CHA012100753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066954bb61e3b9b3b5c7a36a82ca1e8bee5cb45327c72b709b13c7b4b1e3bdcb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CHD542200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe61ea08b458c7ca90e85010dc1018a2e29285155052fb6400c6b2b7a741a02a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CHD542200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98dbb0ebc720a8d007c62d41c7d23b7d81e69d8cff9fd78f6640fa6084ad783. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CHD542200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbd1318f759ad0d7eecc1a234abec7310f80cd8e9753c67bbfea21a3ab9adc3. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/CHD542200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e24443b1e3225254f85022c6526df7fbe180c6bacbfd55b9b80eeb783b7e217. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CHD542200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75452efbe766c531b4cf9e79b6c3791c257ab3088339d7df41c6d2a1165ab60b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CHD542200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3881099087291e1d2a50904a0e479f207b0635cb29012b30d63143a0a7957e16. 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/CH5142000178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e409dc3e9cf4121ec29907f5c5f185d274a9ad66613b32adc7852a7822e9e4. 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/CH5142000183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3aa8ad0eeb171c0e64bf73a42a21ddd818bb12b7f08c0251bd783c6d18fd74. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/CH5142000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57d213e67028ae0dc8ff1e8f4892a69b056acff6d20a1a8aedb55839daed00e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CH5142000186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe270a9f401f419aaa98af43a81783fda31184174a8d74298649bef565381da05. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CH5142000179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5372e3c946ce2e3bc8a2b8ba25742fc4866fe7a1fb4da9f81a0496311a6559. 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/CHA011300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb977bf81c2744a5a167ca72b4525b1771c37c21061a1cc7174a587a598d1d3. 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/CHA011400503.