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 0xb8cb380df1d4288cb9f34026c3a7b24d8a3bd729fe037a1a3a3d438288cda16c. 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/f27438d8-a809-4753-bda4-ba08de91281c.json and https://artists.proofprofile.net/proofs/artist/f27438d8-a809-4753-bda4-ba08de91281c.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 0x0e402d8a2a823d48897ef0110736af19a2c1d0dc00d343dc9a6b4a6bd7d3bedc. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/GBLFP2104196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4419bcd95dbfb2ed334233b0a0fc7787988a907950e66afa068ee0475eeba216. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBLFP2108608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f18701b2a05d39cb366ddf9470b6892db62c9f08b3cc5dd853eee3812cb89f5. 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/GBLFP2108609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa536a30005416a2b322985ae83e70cdb6631c487d4a3322998067ac6c36b4e0f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLFP2109462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30985b5613776176a19f52485cba7e759b19c6ab2c525e3f72f6030e41879b0b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:03:25Z), 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/GBLFP2108610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40a2da7eaf558fab1ed75d6f0ef7e63abcaa4cb9d14eb7c42a6e658cff57180. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:53:47Z), 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/GBLFP2108613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4683da4dc820fcf20338309d1b2110d4c74bc42f0ad794d0597a8e35c05c6a. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/GBLFP2108614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d074f42ce8cf0472be361179de7fd18c958cfc969b8e513d30dcec9265c428c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBLFP2113260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade2191874e182a8ea0a6d1f7814fdef77acf75ab91d06a9e15f6a4231ee32ae. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZ9452005693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f90d81717c62ce4aa56a719b806890b656c06ce6517a44b7c04d6a938fedbe. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZ9452005694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5008340e43919a15039649ccc02419c0bc4ef8a177aba8c93fdadd8e722cff42. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ9452005695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cfa21eac2a96ae8b0272c5bbad0fc4864df9c23e81f4c8579d95da3ff96b5b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ9452005696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150e1318a03edcfdcaae8775bd99790abf4679e86ce5ef997d83fa83f9c96cd7. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:48:52Z), 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/QZ9452005697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33aaf5851ff4c96e411acec3640b93470bed3dbdaf9f9ed5da817801f0f27b05. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ9452005698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb68aadf09920a2056c73c519859a395f71c61a4cadc708e896f186fde3df2f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZ9452005699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6065ecfc3d2c501275153aa8322761f849383468ea366d99a1ad26a00146f84d. 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/ZA08C1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7667cae4eee015656ba2ab5f9bbc486f0582128b15147fd00946baf15d3e73ee. 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/QZNWX2273633.
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