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 0xbae528c8dbf497154daa6eb9f7a0ecbb91fb8f28f717f8e663130173c4219804. 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/ab76e0e4-6fd7-4d5c-93de-c572626e33f6.json and https://artists.proofprofile.net/proofs/artist/ab76e0e4-6fd7-4d5c-93de-c572626e33f6.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 0xfff2e194dab1eeb08db5ac459037b15e30950811aa9381417aeb7281c1ede9c4. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/USHM90575109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b77c3dd15f3efac2cc0c0a2b03a8f33507aad42f2402b5a030ccf43352496b. 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/USHM90575110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeae82ae353b55610ae44cf191ab7316672cf6b9cdfa8708e2ed87f0ea822cc2. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USHM90575112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58099c263b7fa628c1844ec98c1a87a88348339716a56e1f3970b961e575bdd. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USHM90575113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e80aacaa8e21fb07a39b4982aa003f97adebda458bfda03042e869a6df1066. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USHM90575117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfcf22fad55e78211d25817796d585679a429abcb6d5bf18f2c87f3e5cc826c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM90575118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9200da58915697e623675af46cce4e9218d0db51775c0adc58b031482ca2fa3e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM90575119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307ced35a6f7aa4f964b81fede663f8ad96a1b3b4b56217642248f4624ce07a7. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USHM90575120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345649297022ea5bfe7ac3baf21a86bbc34b5be3e0fad994a90763c5b1f88d95. 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/USHM90575121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3286125c6bfe4fd84f6e7303b24b2618ad20d824083306f88e3c0f13d5bf4612. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USHM90575122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f40df6e9daa4b5613a979075a192fe342592f44c2a204fb2b5e5e0862a62fac. 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/USHM90575123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48d453127cf3eac3967e7c0858a05f4f1f3dfbe40be468ae7a98a93f10eacc8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM90575124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556c01c230456426e6ad675e59070e75fec0de6059285609d5c0ffd06da94e63. 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/USX9P0799183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2587a8bed8d852af6c768b7fdb9a0b27a0bb9db540ac9d310935140c062725. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USX9P0799184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82cfbb1c9bc16067ea97cbf9b81fd4a43c42b5db3faabff1983943e225b3e03. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USX9P0799186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370efdfa05b2750a31bf61579c4bb121e00333b1664163e38bc61bfdb4bf29b9. 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/USX9P0799187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35d86c6893ea4d41ba2f899764f964b313c97ea75f28d282ee65ae27c8454b0. 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/USX9P0799188.