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 0x9323a97f834dd9f1bdbc9a9e435cc49a73c1add4f08b7e56bc0309a49cdd1c7d. 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/2f4e6fd4-0dce-4742-99eb-575b39e9202a.json and https://artists.proofprofile.net/proofs/artist/2f4e6fd4-0dce-4742-99eb-575b39e9202a.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 0x4173e47d6680c501817a29dad9fb901153701320ade54d387be3df95347d24f8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZB4J1830748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd94b30f4ff75e35354ee0e451b5ffde10855b14dfe53ffa7c0be9647d536f6. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZB4J1830749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b8f5495fdde0b92390a835c28c7e704c3eb65c872e643b03e06889a916d777. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZB4J1830754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669a7ba0e2a1146bce8ef8fa80a923ec247680d5b581f91bbec97dcd2f75d0e6. 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/QZB4J1830759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db2b37ab1ead29e3f7448b4a820f93c41576f46dced95233ff58a576212f8f0. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:41:35Z), 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/QZB4J1830760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ad12ab703947d19ffcec80a991672a2e509b7ca39de815a52c7fde50398b7a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:39Z), 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/QZHNA2164679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0c9b7e71f8c9a36e7c791db72b950a8ea2bad636cf4283c752c3439b66a7d5. 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/QZHN32172121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32be007a568ad5113da944203526af2727c5be999ad6265c31baa9005300ccf5. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:52:59Z), 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/QZHNA2164680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddefa24bfd2f08cca936d921ea08cd66d702a625e97e03bad91e96c700f1c4e. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZHN42100404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d8450d355f6905bafce3710196ecdbe5f3db76e8e1ec81a075a18185a2ba41. 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/QZHNA2164681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683d4b5ff98a6496d64a8e2f0acf09e9e8ea24ad15977022ba06d42cea9b17b6. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZHNA2164683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563f1da82c162575c4bb033d92ad52917b233c01cd257ddb74ad67b50df8122c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN42100271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3823ef23b6cb7af6ff61b94d359c4a18bea156de6835ed9928c854c048414d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZHNA2164688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599ccbbab17eeb1e6fea79d74fe817eba6f7faec83075c02fd599811aea926f0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHNA2164689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb352e76a8da866b6d68545669e1e60b8e344ba32eb5e24dbec5da93a61b3282e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZHNA2164690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac6f9b53f1d775e53e146025254eb2d23c6a76ce0f9ff51a59921c1ab57d713. 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/QZHNA2164691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875881d9ccebf033547fa2ec90f4b9d9cc574b8bd5d23c47d8fbd49145963ce3. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHNC2566586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ffdf19c4bc8c98cf77f2786b4d649733b727390216cad0484d4bb4fc9e13ae. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6M2560474.