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 0x04c6d596a7d3e18ba62f403951709445c4c19ebaa807b89b0b765a1564d13eb9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd1dd5c4-40c4-45ae-b4cc-470b1e63af09.json and https://artists.proofprofile.net/proofs/artist/bd1dd5c4-40c4-45ae-b4cc-470b1e63af09.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 0xe1ea7f8ea7a78c5a088c1bff68376f16b6e3d8de61f1dcb633c91305acc69af1. 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/QZWFJ2327681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2c021f2a2b83f8334a5b460c1a831a674dde3d438a04a5e74431c79ca4e346. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-17T08:57:28Z), 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/QZWFJ2327682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0579adfcf5a619122687b7bb1944aeca2cb3979622bf37f7ed68fd22074928. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:04:58Z), 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/QZWFJ2327683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5c9b9f019ba1785da1cdaad24f92ef28f8113a24a457129cf3e0604ff8038e. 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/QZWFJ2327684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88617e8ad74043561d128d0a67f4faffcacf84b715f7c131874271eefb5213f. 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/QZWFJ2327685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf919d3e0a3e4f8402271100310ee96743f91d388b759758a8a9415ea203259. 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/QZWFJ2327686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15aef8775faa536daa7132e09e78b0f2ec6497303e876767a5954f4b6e7e6cc. 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/QZWFJ2327687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecde840b3e3bb8dc1edd6ba7913336702c9a55494c7c802827a5ccaf36d217b7. 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/QZWFJ2327688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8226cfcb7fd724b49fa8badac69263d867e6f965545b6f49ec8d000859b3b838. 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/QZWFJ2327689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81ffbf3e60e14cea4cc7d13b47c99484a816d34e0a427f0b01eff2996689344. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZWFJ2327690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d08a4b17afa7090717a2ba9f5c98b40ba93b1d9c5f5ff4fa587cc05765bdf9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFYY2482050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9b9b0ca3458047f66d627df7313d6b9d687feccd2750a5120e7ca128705d6a. 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/QZFYY2482648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3044df11835f6c5faf4dec73e662a9baba4b1318eda9349dad2f2458f7f819. 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/QZFYY2490799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b76d004e54da52843686712934ce0d428a33042984f4e5397b900ca0d8a3b49. 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/USDY42419435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482bab559a5592d629af054cafd7e932c7baa9eaaeb8c134993866c932f49f53. 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/USDY42419436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685039f89a8271699dbc27a28abdc5eaa7cb7e1d9196777004d74967b24c93b4. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:59:55Z), 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/USDY42419437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b10f8eaaa1eca94aaa2259cb507ded27c4e4ede9b0109201cafef18ead0a710. 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/USDY42419438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4535b02b510bc3ee4be29b400a6ff0fb5430f547832e5afdd3eb2e39bd7333. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USDY42419439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04010ef7703fee81bfaca9de017499d3475939457909cb12907daf600c7a2f3. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:07:07Z), 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/USDY42419440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4e8e608e1223b6c6a85ddffbc118477e83827f22f0fe743aff4d610b4c73d8. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USDY42419441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3f30de9a577e8f62004c7f9dc9144b06a1b7c006aeff7ba253f27b305b3f5a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:01:15Z), 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/USDY42419442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8154410e2bfdeb4a4cf2393e628ad927d920ef2ed13b5cd15e16d346d6ead02c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:13:37Z), 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/USDY42419443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305e72cc0be704e611614686182880718337dc308fd557efb6a1037d3c902059. 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/USDY42419444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed693be722ce36bbeb61723623b709733b18e39881979912a84176f1b6d7f129. 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/QZPLS2434225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02abc75c13009f79deec278467daa07f8d716230c9857f7411f7f4bde2091191. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZPLS2434226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4940ba502b5ee5f0c9893502aba74ab6f0321fca08aa8cd22e31863b8e1bdd6. 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/QZPLS2434228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c16272f6b30c477f43e319c4159e75b2d7bf3b797f51ed0b617a07c53a115a4. 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/QZPLS2434229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1d029f3cd32b718e25fa5f7cb59d241a5f716de511db57c3d90716f6d47710. 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/QZTAW2446831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed25364b902c5641516b27d433fc02697d2713418e4811126f52bf35c69cf4a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTAW2446832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8506d1c356981793f1a34acecc2255ab5da81a6969097fcc65ac6e2e102ed2. 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/QZTAW2446833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c9e2791fe4ae2ac6d323e9337bec42f97b5449dbe7ec471aaef79c9c5bd020. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:43:48Z), 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/QZTAW2446834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6294ba5f3512edecbc507ec7657bd07cd19c0d5a79c3c45954325021056be8ed. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZTAW2446835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958815f0ac45b73422ba777f692d13e57a9464ee98a6bdc62339c06a1f1b36a5. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTAW2446836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86241f095d45b49887501a1d09d140d32c2db8dfbeb21d8c058d88000bb3aa64. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTAW2446837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0effed4229f8ceb697aa1605ce727124150336c30e98d209bbb51e621b5be929. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:48:02Z), 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/QZTAW2446838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0175b34c2fc3bf03208b3932b1f303a81577333bd03e107c9baa9b684bca8d28. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DE1H12403651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6301fa8106fe0d631997957ba5f5459b9656fe0e8dfb69b8b4e19184867d9d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DE1H12403652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313eb3960bf7c52ec296e88dcbde81a2409b879ef706541cdf29c2f85f874487. 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/DE1H12403653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3a22329dde16292a9acebee3045584d3d2c22549621ea9df45c435a7f657b9. 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/DE1H12403655.