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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb272202191c94f209f9b0c56e57d4220a9b5777587eb56525ea086b7ecac6c8e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2fb9a21-6569-43e6-9e64-a4f448f7e395.json and https://artists.proofprofile.net/proofs/artist/b2fb9a21-6569-43e6-9e64-a4f448f7e395.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde48c8557d93073b16772864f36765d97bc903fd0b298160dfe733ea592ead51. 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/NLA240402510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c7a66ebe6e597d92506624c6c219fbffeb4c3d8746eabf35888b3bee3dccdc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLA240402511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d96124b8ca133d6fdc18142408685b2d16e55cf0974a794390c4f81a396273. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/NLA240402512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac54cdf1469ce767f8a4fd20c8143ba366145e1d0e6d359106c17490f95fd3a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:46:45Z), 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/NLA240402515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe705393d8b5f4a9021be16206dffad786fb7e17ed6f7ecfcbc7870c02301eab1. 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/NLA240402516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0bfadab19b0abd4ae48bf1e3533727137b64577be670bc08de480217f789bb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:00:17Z), 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/NLA240402517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fee71a6ca9b90a8c2a2b2f5c758c6ffb669ea5b8611d4eec230b886fd863365. 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/NLA240402518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89ccdc636dcf80b8f36fd980ebff24481f6f454b7dbae970428d6b1b8ee93e4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:23Z), 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/NLA240402521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc265f0b39f1eb41961cc227c55c9983580b60099b7a211c0b6cf2ff0146edf46. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLA240402523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fa7ed448f8fc5db9978f8257bfc92336472ff597e0041fc12419b9e53c74ca. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/NLA240402525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b006c7efce5c70e77ce2232a0ab4223790b4f10f4f04856b54d54c37fa3ae9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLA240402534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664474412465e879c4432248c381812183c490919475c48687cb5322a741fb2d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLA240402535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1ead78b192cbf4b98aaf132042a258fba2a15075c8d11dc76482254154fe71. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/NLA240402536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5eb72dd45de701df8d68f5a715ff80179794016015508d09161307bc6f013e4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLA240402539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1689b0b902305f75a5228c0b4c6d70216664dae6701a7e66e8cb8aac92dae082. 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/NLA240402543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc49d90ae73b1957c47cc528167787b1bfc6f15328d2fa01f81b250a215737a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLA240402547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe930c6cc65f029b3e94005edfcc206d3f339fafd5ec7d596862b13c0ef59b947. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/NLA240402548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b9e3198119a88e8cae9bf0f155b05dad71aefca11f9562edf4acab2c26aba4. 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/NLA240402552.