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 0x9f0c28a35cfc48c720712d831f02e4d3a650e646f2162dac815a59f152ec32a5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de684a06-becc-44d1-8165-1b624f1f82f7.json and https://artists.proofprofile.net/proofs/artist/de684a06-becc-44d1-8165-1b624f1f82f7.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 0x9acf84d8dc2c92717dedf3dbcd959002f67cce281b6bc42b634c7924b7da719a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2527385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c0c0ce6aa4e4a538ef38fe56f0eb3bd54ed2b74f775ceed8c23a9f9a83d5f0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2527386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2031c73add755147c1808d1cd38dbadd18c2b6fba4a97b41d2f3d6732b7ed3ce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2527387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5321502182d384803e59ef0a8f7e66463560d93fc917fa458a8a1c528c917c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2527388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff00658b71f67dc97a97d8c93239a926edf5308864ed18ca5d3feaf19e6ed528. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2527389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d4a8b83be39728936e7291e08d27b1c88da7b5b4775d6aa1fa0de12f7b2b99. 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/GBLV62400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa890154046e58136e4c486c5230fae4bf486f61f7bd150c94b621da9c064b6. 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/CA5KR2453391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa45e53fdbbd747d2f02a5c731b9cb91d0ca5076c45ddbbf3cf566d9f447b3dd. 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/CA5KR2453392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624e50331a483faabdd6715c6d068f33437db38fd71062b4c281a9f08553ae20. 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/CA5KR2453393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189f21aed4c36392590a19474237e7c1139a2022f02dafff318cafd394bdb968. 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/CA5KR2453394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e69b410a56a3ae03354c6ec169dd9136cd1876c47ee81f7db466c4f9c0fce2d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US3DF2431564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d9a6bf9db59761b954cdeed69df1561f4ee515fef26afc1b830ace061b380f. 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/QZS632243249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d63e392c33ff7b06e121ff60e2d0d7bab506e573b3fc56377452c01d755094. 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/USANG2407361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79138abe35cafbf5d8f3f6c4e76b2a416128336f373cb1df1fd56e9b306c0cfb. 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/USANG2407364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046831433335329c68b0304b99bba2e1844c3da2bff7cbcd40d4bdc6b2d6a5a4. 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/QZTAU2425695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1453866fc6da10ca77e30ac0e2cbda71494da8f81f3c02a88ce0e1a754d70291. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMBZ92416430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dfbeb5aa0aaedfd4ce01ec29ab161020d7a846ff7be66c7813f0003d1fda42. 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/QMBZ92416431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0d5727f03481280a64dbecd494dfacb78ef9ef10ff790a7446e79663fea0b8. 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/QMBZ92416432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c651753ccf4f404fa905cd4900324c078664dfb3dc249a4b64be38d62d9c19. 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/QMBZ92416433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc87248a733e170b3c700cdb60db6f5107eb9c8d5f094045abd45a1941111c3. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USANG2407365.
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 0x8703892915d9707d0f2d3c21d8bfff1b59755aa229b280ede2e4ae92c9f92d68. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USANG2407360.