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 0xb625af52d6de3be395bf5ec85a09eebc99ede83d02428b7eb73859e2c3d1baee. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b34cf7b7-765a-4341-95c4-be59b398bb9b.json and https://artists.proofprofile.net/proofs/artist/b34cf7b7-765a-4341-95c4-be59b398bb9b.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 0x080567eaccb12aac30ac45bb9ebb7c4ec0afa0bfbe4d878d8ebeb2d4a2a12474. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USHM21974325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadd9269a371f558629e41106d7814eb3ba65535d285051d7c46b64329ededa6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USHM21974327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75252a33f1c6c29de2e4634ee7e609cc92646f82da2346c8920bc5137666322. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USHM21974328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c3b45cb3eb3955761e620893b7f0ac8b6c16ae4a9bd96a0d5ea6b4b32b77df. 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/USHM21974329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58149c8ff8963d2c2df5288bfeae9e914fb1255e425a7e29d11889253cf9eaa9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM21974330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10624e0c152bb1ea68b9c1ddc73953c48aaa7db4f8ea4ba277d948f793e1268. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USHM21974331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863aeeff25286f993d9facba36160677bcf29cca701efd9cf9d49d36a11a280a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USHM21974333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29b986592ae4fcde65d3d78c9d2ac7f527e220d6e9410fabe4ac34c0d3e2be5. 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/USHM21974334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704c71ce041943d49308cdf4e75d7da508bac3dfd0e86d82e10daf2f8d0fd010. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USHM21974336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37c3f46a52969539844fa7261119bcfef315b69fd386f02d851b2c8232ded4d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/USHM21974337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3abb878ff627af26c59ed9667fc4325a264d5238e4ad00b8431f03eba6ae2c4. 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/USHM21974339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffaf5dee083e5a4c15dbf8d3f87c2c899d095968f468ad6f57f465260e313ac. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USHM21974341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d8a6767917f3cc5b1055eed2edb473fb4703b46f0ddbdd25e77175e9a4a9ce. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USHM21974342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecbc34ee47754c9169b7cc0a31b9c8a31cb9899f44431037edff3f69d8888ac. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM21974343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eed0286777e446e73cf034f09292f8844bef9f58e8064f3d967c5550ca9cce3. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USHM21974347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb830f0dc63cd539c787c0cfabd5956830448e8bebc5c3d3f3b3ba8328d32afd8. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USHM21974348.