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 0xdfc01bb6df8bf822ad9a8622c10d7f04cccc131a35ea3caca0b0bfece9aa3791. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c005cfae-a081-4406-a309-b8b98fe2fce8.json and https://artists.proofprofile.net/proofs/artist/c005cfae-a081-4406-a309-b8b98fe2fce8.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 0xc29b721cd7a3cbec3462e90a3121535676be315fd396e45bdeb166fc9a2c32d4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CBF8B2410058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402943ca84951facab6c862a7b8c3832874a500faca0fc5d9d5dfb056cd55e2c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CBEYJ2494268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff432412f4cf5885c79fd93ce0751745e49fc955df6e7492130f33a6e310ab78. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CBEYJ2494274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71d89a7519e99d943bd92e9d20fffb33b31566bfedfdecc9f1ef56c3d0756ae. 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/CACWV2541284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be86725820b4e2dabc6874a68f764460b3499be082a4951511a5eb63274d860. 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/CACWV2578345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484be597ccf528ebf2cea63f49851d752dd460698f165a4d8901cf4509272b38. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/CACWV2578346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cccf80601ca6d25b3c46c7a8eb01aa256dbc5fbc86c5740d8f95947f0da3c04. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/CACWV2578347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24cacdb4062c76564b4b79af9e6f4b56261a19a9cf5d359e0c96d8106f63a99. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/CACWV2543371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59fd44e85b5dc2eb69224151db49d51c1c4c096e7626952a4427a0f016865d6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CACWV2543372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705fa8b40e4f3f8f72490b6e6e4cbd3ade282210a90c909e4313e5e35a73bb55. 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/CACWV2543376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf44eb4d834c229419e22cee9fd7dc0da5a68f134c8a0076c53bd322e3fa7284. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CACWV2543373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0384e9f3c1a88cf8fe9596fcefc406ad9764fd6d0f48c743a1101354dbee460a. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/CACWV2543374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49dd029e71882e8ded2522bf487e6c5e0787d33c23c70ca3d6c5f8540b121cd. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/CACWV2543375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb754674a06282a2b39c8de3b46ab73543cf3f4bd742da58a1dd12d25de659055. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/CAENV2586658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca89a3d0433870e37477b197441be9a4aa9050fdbad39eef636fefd3cfda56d. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/CAENV2586663.