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 0xa3e9e42ea95f408dcf8336fd35d88fc9d0ba6f902319b4dfc0ae0d86f1e48b21. 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/58cfad9a-ac20-4b6f-bb39-9af4b040325c.json and https://artists.proofprofile.net/proofs/artist/58cfad9a-ac20-4b6f-bb39-9af4b040325c.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 0x5c6bb8bcec3dcdcef9d45d9c224fdfdda36f63689e5213d6f5dbc393c978535c. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZFZ72060022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf520438065baf254b84c047a1ac6b48f7c47dd238e2ec526a9142ede3af5e24. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZFZ72060024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655bc98e6093b2900ee863d00b015f538253261b21333598388f1cb90b17312b. 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/FR96X2263049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55742ad325654d76925d5750edcdb2d1cf5465a22df95c3480b9cefab16c8f7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/FRX202225861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e1bfcfa37aea5a92c7838735a691186f7eb955fadcf95d40bf600c22a6e4f1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FRX202298391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793b7af6a692e15de71b7ac7dafc0c51c197c07bc0f0384e1c838a88d9ca110a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FRX202298392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e17e444ea5bc2832bfcf32c9df90609b66ad312d5ca4e2359f5a345b9930090. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FRX202298393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6626bf2ad006e79498a243a2682f26e5176844f0fade4ef93597d54a1bbaad58. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FRX452290356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cff629448bdbfca76d3fcfe46de0e5daac52863b29de9a35e0c829cf762e01. 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/DGA082388423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c35231b037cfd380fd4423a3c7bae2a7aef3fd2cf44bff3c1e423cea93d2b9f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA052491013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415799f382774db9e1e59b5e3635a37a1fd103d39511eba774a6c3d7fca30366. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DGA082469008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1853df4884b4cc4cdd3c792bd177ea72d714adaa0f320da794d33adb282684cb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DGA0Q2435283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88768ed4a3314d20d4681a3ab21576ca2a774a29512bcc797a1d0ff013b543c. 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/DGA0L2420607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415799f382774db9e1e59b5e3635a37a1fd103d39511eba774a6c3d7fca30366. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/DGA082469008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894072021de1f83057ac2170060bc7969d79e255c26d6df4eabb79c7d2315d5c. 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/DGA0Q2435285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d92a8c5a17469bda5f711df10fe4ad9d12dc6ba4ad4b168230d25b837f4120. 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/DGA0Q2435286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37be35587ff48bf0aa1ebd2591db001f702ca72b1a6e217f302f6442d512a91. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/DGA0Q2435287.