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 0xe2ea79f68e8a65a07143d31d97fb34758db125f52cb2eee61a34aa8d6b696492. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8e9f212-e0d1-4851-b43b-00f938c02c97.json and https://artists.proofprofile.net/proofs/artist/b8e9f212-e0d1-4851-b43b-00f938c02c97.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 0x4c933591e4d7f619262e6852b15acc20d3108f10aab309f593d390a2d379d902. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DELJ81911019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ede8500eaf8ccdee55d01f503611612cf43e60ecb94c0232e1a367b5dc51005. 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/DEZC62256843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a2405ab1f1f374a4a0bb2c93b97b574e4bc65776b17c0d216e1f27ea44b49b. 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/NL4NL2170360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cba740a27ba64d5cab11fce75d9e8eb23dbcc27cab2322d4f9a03338a1146e9. 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/QZMEQ2118780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fdd01e99dbcf1566a08086d33120468e2f3c7c18a2d6456d2bbd874d5a88d0. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEZC62106892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99e70dad85f8988a2c393dc63ef9874840270d1cb164bb053a8e6fc6818bb2f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NL4NL2130379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9499191107f2be5dc35c6f36362e74632a7dc2afffb87dafc65b2a6a6fc19996. 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/QZFZ72113600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9602076b02035a85d1e8597602c34d9b0572a38f4ce25bd0e2012010007519aa. 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/DEZC62034464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdb7e9ddb5dd8a4721008c02aed1d7f650b0030b97792a8e29d120ac8c20f5d. 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/DELJ82053390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbccf54fde8c0aca21518f474b208f95ccfce858b7cc95a916b1ba3688efb324. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DELJ82055520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d1fd12354c2763fd8ae8cb86e754733e555beb7de491a0c5b459b8c054c7b2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DELJ82031365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf779d510c8eb2dccb80d2c7fd20ec755530c222edca4a036bc75933308de6852. 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/DELJ82074043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c41062364f959bd6f325239cc7c99b69639ab75c3e1b3bd7d793e049fc20636. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/DELJ82074044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6778fa2c23f04bcee568e8f7d70d622ce0576355fbb980927538f2eee93514. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DELJ81942062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65dc71a4d997cdf128f69b5054c2dd0e2c766ee9e984934bcb3d499763e37b6. 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/DELJ81936662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea015388655b4078b6a14d21e244321edc9d065a90e5199d4f10871b73a01643. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DELJ81921064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a277e7d6c82a40126856c41126711dc8d8a71db0410630254f42509e0be1b8c. 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/DEZC62046100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3540bc6cade6d70ab1cc4e939e5df7c29ada47c767d3188a133e8fa8eaa9ef. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEZC62378577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593befe3f13cae46034f8030ed3c94563301fbf9fd32f41a9c995bf24f6e72c4. 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/DEZC62134413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e67ca08d922b795ed0133ecc3f8e27c178b8a32472570c1f02fc484b70c5ea. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEZC62129403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772dea834027f270b336b1ec6aae2cbab5c435ce16ec713f6ce72e982a193ada. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZFZ72017849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1aa225d7abccc98adf669de64548d0171eb3ff07efc0f7a358e62235cc3252. 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/QZDA42018093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2103c78374754367c4e431589d60ead1653419161e1a29af90320820b167515f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DELJ82063794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873ac5ee845e9649110174f4846616dd03fe5085ae865740d7b40b1dc293f132. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZES81934643.