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 0x1c23fbb6cbec1fa8099ad4289c8a55e535c45fc18e3a4574b967d4b08b489b9d. 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/baa16feb-a122-4574-8930-db78fa5b0fbf.json and https://artists.proofprofile.net/proofs/artist/baa16feb-a122-4574-8930-db78fa5b0fbf.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 0x367964039bcd2debb08ed98a7602340febd279198ea5d9d3bd9f83dadf30b9ad. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/USDNB1022402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6e71d14a6d57e173b1e00e46cef3669557f183bb1edae0ec7e61ab3c59b796. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:58Z), 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/USDNB1022403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490b484e2a9b401cf1d1945d83cf46e0fc50309ed3fe5ddbfbbdcbfcf676482f. 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/USDNB1022404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaec1b491b37ca5efc2de9781fb4ead1245a5636633034cd0826f06d1acc920a. 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/USDNB1022405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f282d0a3bc37058aa983b0ec6af0b8025e6ea13318dc62beffe97e0e93eb63. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/USDNB1022406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa1e5d60e2992118df86bcda8a7d73372a610ad1bb4f4d04be6c2bf01f9ad83. 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/USDNB1022408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080fda45dd32664d4e02d9b7c0244104cfcbc08b5bc25a073045f4bb92bcd831. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USDNB1022409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a084590e491e2555f6bc1c6b99efda93190d05642d3f5b4256f4801317b3b3d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USDNB1022411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad539c3daa306dcfa7a36c28371f11defdb4151df222666dd00a59d0dbfa9c4. 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/USDNB1022412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd424228730e21cd509e14503dafd4eca06c475b8bbb191f9f3ff6d07e2e77143. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USDNB1022414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f5a1930f889e751ceecf8be7b299c80017c1491c7c170818eb3d28d184f6a3. 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/USDNB1022415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee16877521b0a9417fbecc5a7b2e279ce6d825e6c35cbb36f7beecdfbe970bb. 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/USDNB1022416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd2dd60d9acbf2b1ea48c1296e7747519b514ec79fa166b334ebde471ffcc49. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/USDNB1022418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa01795ea5d1340746a178382da0825a9122854e040e78a290b049a7e5a04895. 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/USDNB1022419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebc182e0f5e364c19df5a3cfe77e0362908be826d82e777d655f250a8e9e67f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:31:13Z), 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/USDNB1022420.