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 0xd566c04409ecaa23e258d6b8ed15380808fa671cb97ca3de46281f31e68e95f3. 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/c63608a4-dad6-4285-a89e-8ed9481de3c0.json and https://artists.proofprofile.net/proofs/artist/c63608a4-dad6-4285-a89e-8ed9481de3c0.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 0x692ed725c5131fca911f354551a2812ac4cc38cc6f9ce3d61aee9d757dd03478. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/CAQ8S1614335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea840d389c7e1cdcbbcebd90fb682b0a3749c74b5b918b588777dbe1bbbc9b90. 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/CAQ8S1614045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b755b1608e9e304d64634440418b8310e65f3e9bba4d9dd88de061649397e2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CAQ8S1616478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208462553488dd35aeee1d9f15b0254a2c5409dc5b2cd52aae55b7fd463c95ce. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CAQ8S1616792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dbae4808982891f05ff62f12bdfa38d770cc3df12a05727724635a08e8998d. 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/CAQ8S1617791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742a9bf83cae32eeac45b14649d238072108fb12ac86491c2a8f41491869e891. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/CAQ8S1620435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e15dc9087a6cb3919b07e10a74b64173f3c972d6714ddc4b7e7bf74476eda5. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/CAQ8S1620796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a09fae4d9a9d297fa883c273c81af7f4d714eaec9b94e453bf0c92b392e6fa4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CAQ8S1621632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0453e8f7938afb03e3c3255dfa1f2e43d9055a1495073d3769bf358e4a211dd5. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/CAQ8S1621771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d6bb7a122ce4c7b9a52709defdd9a7891303eaa94a8b9d28803028495065ae. 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/CAQ8S1622760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c05b1b8a2802b0875718a52824bdc6959b3743bf1057df039c580c2b51e71d0. 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/CAQ8S1624220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46df3cc36911910b5764c8b032ab44f1b13bf5a489fa84dea4827803ac41ad99. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAQ8S1624625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a3dbc77e5c2e4647b4bf3a47b2a12ab0b3ffbd534c151888de2089a921b6b8. 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/CAQ8S1626659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717b26d26867f327e97e6ecf0f5a87016debecd04524f6217b88c57e723a151d. 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/CAQ8S1627217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84d3a5b269b91ff698047aa853b420da5548ab2d2095537cff1e91234d7e01a. 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/CAQ8S1628286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1620d8a054419af400bbc88e974acd9fadf02ec0a431af63323f4e71b2ad1dc2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CAQ8S1629319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82060ce6c85397ba95cb9afd0abe3919b901a0078294e587cdc1678f87dce9a7. 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/CAQ8S1632067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e3515b413622bda1a9c7beecccaf1e1ac6b98c58aee7108cebd4058aadb3ed. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/CAQ8S1645844.