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 0x3802987b24c1815624f93891fdf0d12aaae95b603be816f98d0c0ba8e2df96f6. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2288eeb1-a855-4a4d-b15e-39b17789a1d3.json and https://artists.proofprofile.net/proofs/artist/2288eeb1-a855-4a4d-b15e-39b17789a1d3.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 0x94673d76551ceb48a0f27ebe5c3f54b57c507f3206c108b45d31096142e594b6. 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/QZNWR2358298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8685c3cd95f0b3f8fa1b9be657ea8c643bc1fba6453b918c0e6f1e6ed9154da8. 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/QZNWR2361612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90add9c4f1a528b639e96f8a24bb22da269515132e26252c285eda0fa4ac927d. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZNWR2361737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5c2045de14b137ecdede3f61b60f11ec1c6083dd00fa9bf48b6762bdf5285d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZFZ22474299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3b94813edc9121782ce12a950f4576929b0789bd01215e544becc6fcb6490b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:55:49Z), 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/QZFZ22475910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdff5170664b6319830e0f0c8b8dd9cca1dc8902b63ef714d782cd65fda92526. 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/QZFZ32401527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6ff74c5fab4edc9989aa9ad81b44a967492bd194ab9faae767015053a36ac6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZHN52467939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e12eccf94b54128fbdf49c0849f99935c670cb866dc80791f23fea0a3fb052. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZDA52478189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262ab591fa6c6e280f02d54efc7b0dce6c82d324eabad97bedcb142bc6675b06. 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/QZDA72446561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41c814286d400a9858455a1f4af7e753e02ebd5888d0e812f0f332181fa9a8c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDA72443979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bd9c25e809e3a056d18d418155ad12a66797ca8a0e1d888e82a198377ec3c8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:24:32Z), 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/QZES52474415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf072e944e27a94bc8545861c7ee5a998db96a088908b99fd3acf3f08aac428b. 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/QZES52474418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bcd0ca625f6f96848cda9f0de1953ae727db6619d04ec822e8599cc0fb9ecc. 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/QT3EY2495829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8704e68e4b77ecab6b5bd3331bf6d0afaaee2611e38544af216d2e151799bab2. 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/QT3EY2478748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306b2ea2ef7e727227b4eb2e37be7504e2379ea0ad4da0b5323714f42504607e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT3F22469608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ff8b7dbfed496207caa280f5ecf8552773b1c65aec6a96b631b6ce5971fc92. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QT3F22471140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0a1d47526bd27f4fbc5626c43f4ed41012d8a025559419a1b45ea0c5baac27. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:02:33Z), 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/QT3F22471145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa603a892ebbe1fccaede096b66c19db94df5686803f58101f695d16b02e491bf. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:33:43Z), 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/QZK6G2514689.