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 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 0xbefd7e61b40e7a7b776ce8f06c3f29ce4bb5df5bd0816b153400d30cccafb68b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f9f349f-5b33-403e-8f7b-a369b279e60e.json and https://artists.proofprofile.net/proofs/artist/7f9f349f-5b33-403e-8f7b-a369b279e60e.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 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 0x02836adebecfc840ca3fe20d9e4cf663b3fd90548b1b392546138efa2ae9017f. 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/JP92L2300940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2805ecb597689190624ed4707a1f0f257daed6dd191a636c0ac77f6026e5a2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JP92L2204890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b290f3879c376e2444e55ec65bab3346a354660c3a99264c7366e50b352556. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JP92L2205940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46b8ba4c3a6ecfa9b7b5eacb12cf01e03d36e7831b5252aae4cdf4e6db0cea6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/JP92L2204600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d891758bc380a09952f1a9757299f805eefa595d9c15bd01ba2237490097b5. 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/JP92L2300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606eaed4f577e84ee5f99fc50d1793774bdb700001570b4ad5e8156a74bde9fe. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JP92L2300950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8be339408987ffec8c8294d27a6e6c56dff9fc13f85505a37499de7e369fe3. 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/JP92L2300960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9fcbdea51cf51baebe1a785f73349b07ed6de1b41b02433d464c7acac37bf6. 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/JP92L2300970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262544124ed1d802c2d3f9c06d27732ab4876f3579eeca459a0822263389f956. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JP92L2300980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032c93a0ead37e211f19fa2b6503d86c23ab72de35de8043219adc0bea463e02. 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/JP92L2206120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a64cd50e69a32c6d1496c5626d93a03e8e380134af34b3fea48b0dd2f7b626e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/JP92L2422260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6231557976f27d3dd8a520c0616153c6b45b0e0a2403c357cf9b45fae4f27a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/JP92L2422250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadf694e028802cb79541824c447b59a336d707f99b825ae4a16bb7b2b06b56a. 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/JP92L2307810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa01c6a9ca53f1c5e1926bd80ac77911b24ba286dc40a50c0d11b0ff0cba446. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JP92L2307820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bff1758deb6719a84f0dc9507768de17388c0f97762bfa5b18072aa0d832b6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/JP92L2307830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee1b1e0cce5544019a39be15d88224ec4c5929948d58cacf7b81af67311823f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JP92L2307600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd1c1a8d11ddb5555d370c25e9214f96501f4a5e0b2d4764e77006ee95071ae. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/JP92L2305760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490b1f7edb96a1e9049ea17959aaeb17be1b676bc96daabc622b5205d8839c50. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JP92L2304210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac9a7468141301c1a1f01b9675b3a72ac3165320f7452df1c43c92bbb78454f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/JP92L2302370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b290f3879c376e2444e55ec65bab3346a354660c3a99264c7366e50b352556. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/JP92L2205940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2805ecb597689190624ed4707a1f0f257daed6dd191a636c0ac77f6026e5a2. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/JP92L2204890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46b8ba4c3a6ecfa9b7b5eacb12cf01e03d36e7831b5252aae4cdf4e6db0cea6. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/JP92L2204600.