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 0x7e4a9c68866214bea4fb456da2a1fe41cf630457fd833bca2f1bd5728d2ba5e6. 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/42aa2bb3-d90f-42d6-96b6-b7a7c5d38c13.json and https://artists.proofprofile.net/proofs/artist/42aa2bb3-d90f-42d6-96b6-b7a7c5d38c13.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 0x751e776263b7bf279c03c7f5142a503c8206dd028a991d180a66b70a2cd3efec. 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/TCAHO2360504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8886b65476eb4306a0cf62d503b59c0901b679394f0ec063237255f361f8f7fc. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/TCAHO2360523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1d45096c3020004585646467cd8b30e40fd7fcf7a301a006d12b09ca287e47. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAHO2360544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9857ff1902d234f2a352a15d6106a7bc30aa4105bd3340e7bb1712467c1cddd2. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:45:44Z), 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/TCAHO2360550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc1035de9e872d2244e9a57fabca51538e4e05e7158a827cbfebedc7e76a338. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAHO2360554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d6955c90c8d9a0a09e0afa1a9474edd9c1a53479d4d263cfa9d1320e6f0347. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHO2360583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74b9d72c0cde8442f2bff7cd370848b77c6335179ed2e24c9501f9c62bb6c9b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:50Z), 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/USA2B1302253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f06f62a874ce06222171413822a15dae48b9f2c9ed9e3b5bbcf46549e9a787b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2B1302254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539d2cd5d0fedb102a9344ecdd376e811c9afd8a9856c8c904e116cc47a2f9cc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2B1302256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccad77fbae20543bf3009dc6dfcec5dbe3019b58e521c7a34ed7e505b52b8e7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USA2B1513094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c9143a26a4685b238d580d0c0863a5e1b1334505c60ed0b38022305d40a99e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USA2B1513095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbbb4a667a0d8fe5c748f15327dd3a4617127fa9b4dd47eae1756fd25335f9c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:30:03Z), 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/USA2B1904496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b3fc3e4960661081e9fc2ba87262f9432af144035d74b1d64d9c829fe9a11b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USA2B1904497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb83ea6bca6f32fa4e171582317abfcd8d75d2eb79d5a06fa022803d7973a559. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USA2B1904498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7b988fce322fc6cce415b8d4744e19d74f5e2d1549fb9749fa10e3f507e49e. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USA2B1904500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7d8c8f429a44b3889dfd1cfa3d3de9a54061bd0b80efac693b7806298b9683. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USA2B1904501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0562d55a8ebb4392a00a9f6008dc2f36902c001a7af3b2888eea44db18fe7fe. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:58:01Z), 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/USA2B1904503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217517562aab4e4784c48dfee926f3974c3c0a769d8cc5cacff08fbe26170be2. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USA2B1904508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f735550ca08a4f78545b4816e4a0d3677bad551f41798660a3be75fe2a72d9e. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:53Z), 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/TCAFO2117790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59879b6b7ac1ab8eb5c73b4479533aefbda8ad07e9a5501c02a8fbfc3a719b3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAIB2432874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c3a4d9d45dab32765488b2f6ebef66553846d06e0ff12567f474ec4ca7ba19. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAIC2452141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7276b494cf781d72d3581cbc33f619b4dd0b42841c3828ef69c7a90798ba75. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAIC2452158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead88136a04c35130b58eedb03c3fa3c264c78fe63f12996f579c12e147f1134. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAIC2452168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4beaa4ea866aceffbea556fea46a96a7e5ceec567f4137582ebd15ea9ca29ab4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAIC2452209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c8b6da13d682bd8b7a61cfddde47c4d41a340a812a4f4c2322474663fe8018. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/TCAIC2452229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372a23324a117f76a36875d0ffbb26d1eb6f71741ac65d1ad0881448eb72fda8. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCAIC2452239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9b497d9f38e8918ab8eeeb66c328913a6e0dd268918b640d8a1ee7ac6f4d9d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAIC2452251.