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 0xd97f98ac90e60436ebe8107bb6f11f2170498893e4679c96fe1594bd029bb06a. 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/d38a7fc0-60da-4779-a967-8bde94af28b6.json and https://artists.proofprofile.net/proofs/artist/d38a7fc0-60da-4779-a967-8bde94af28b6.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 0xeac46a0d7ce8531a2e693e3e7cf53d8898ba25da2d799fe877d9c7c94038c4d1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CASD10500815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dea5d5bbbc4c5f45d11cb173f632864483297ae01be3b0f329980aaf28827f8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:39Z), 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/CASD10500816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa589bf068ca3f3509a08c82992ff767ee193a34825ab858df34be3a529c8381e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CASD10500817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f72a2d9ca14a7c884126f4a41ef25d80c7a94bebb4bcc84281bbb862c7fd7df. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:53:07Z), 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/CASD10500818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6162c649b2143b898cb2c3db6c2164e6a07f1b3565afbbfc66de355df1c4cb24. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/CASD10500819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544f42db6820086c89f4a3c345e97f632cd0a8b83a2da0648507545c4662c97f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/CASD10500820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7a3b4e7eac91ed9488eafd0f4881df2298835f6501b58f9030b9962000fa25. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CASD10500821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4f1eee3aee53db84b7a964919b5dcc78f3f54e1476271a2d3c2e89dc6b0505. 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/CASD10500822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14a061f3c8df5e62439749d1cc70e780ed6cb93625b617def03d89c7d6e6d8f. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/CASD10500823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd966819022883bebaedf76442b313d96ff024c64a68fc58cb2cd1f72d034bc3a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CASD10500824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0e1bf496ee294cc1428d4f945b47046e8e2f2f11b8de7c5c3e72827476462e. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:00:05Z), 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/CASD10500825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ee56497ad1918e14965ecc77c8db88665d92cd843a2ac0e957b4a67e8a180f. 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/CASD10500828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb474201e782cc18cb6b32aae9f4e8896a9cd01e3d2c6e38e03e22bb99cffa1aa. 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/CASD10607776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68418a87833f90c149b65d9786b9d2ad2d4ae4ac727082a6b1d8851051ce21f1. 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/CASD10607778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b373a510661c084b5a4d6ca93522727a77a42f9b15743687bb61d3e41b2faa6. 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/CASD10607779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bb46161265d4344605ea6dcdd89b95861d22d51edff33d20a6e817e6987e4a. 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/CASD10607780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3397a77660c09f4238c28446f49e9fb7e16fbd8f5dcef147988c0f96c93955. 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/CASD10607781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a91b281ec0921d298fe9234d0f9282e2ea96fdf2bb4fd5a446d45b1a02588d2. 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/CASD10607782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b36f9554bca67112684496e92246ac5dccd20293807ca7cf38b67eb1af9acd. 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/CASD10607783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ec086bdd931c1ee0ec1442565c9c6aba5a89d0de9f12475cef3017910f9035. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:14:42Z), 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/CASD10607784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643ddd2bc380f22378e3e9c461be93c65606eb2b65521c353d91c030f7c68692. 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/CASD10607785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18281c6e0636c07b3316015659152977284d2348e58f0e4ccf11bd5e61fe8df5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:55:38Z), 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/CASD10607786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299e2689e81a5b3ae8a9721efb0519a41f952cb9836cd300ef868900bb63d7f4. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:16:51Z), 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/CASD10607787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8bd3f2458ac4f47c70af8c241a14cebf1dd4815b3170f9b4ab071434d2bc80. 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/CASD10800917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25878e4e47f9eb26477275e6455ec307c9eb03ee8f378cf4293355a4531f6df8. 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/CASD10800918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8842ee363466fb147736516fb3573c3fd6a2633f8604ddfec02b595f8d5dbe3a. 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/CASD10800919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658b8dd91a40eb557d2bf6fe6d90519ff9cc9f47e1b13345dce212dfed2d9820. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CASD10800920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f23c57a99b458c0f47b8af285830fbf442dc750e6f80bce331a1a7a31b56582. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CASD10800921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc32e91601ad7cb10badfc155b391d22962ad6d4700987b14a59761aec25041. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/CASD10800922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ae51dab31c55ac88fa07d9bf43f8ebb00a36b0fb6f308f23de82a72e690931. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:00:38Z), 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/CASD10800923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3792da1bb85ea079431ea9b206a7e9a24afd5bf99c6a0115ff1d3920c12f828. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:46:02Z), 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/CASD10800924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3175f33ec6c70c285bad2a3850cc869b484156fe3bc5212283c13a748cc6203. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:03:44Z), 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/CASD10800925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaffbfc679068b6133e9f44da82839ea6f029d50b4bbd67a4f88d5c1f6a69dee. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/CASD10800926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d6d82908710775e22f866990eb05c08f5dce106ff087883d127719da5753f7. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:00:47Z), 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/CASD10800927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4680b8d27fe1723c1dbfb2d4da4c14b1a5f4c4132100d2c70ffcf406191b550e. 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/CASD10800928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90fa184caac14067dd9bb9318ddc0df18550e1292fb59895ddb43de6d72e199. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/CASD10800929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d708cd9f79902c8c32a5abc4c609ae1f3a81aaf6e4815b7fd10cefb2a8ee933. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/CASD10800930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3ecccb74043848b141de8f0973ae28740e6c35c41556183e29894b265a00d7. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:18Z), 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/CASD10800931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e859cf5dd19c8d48676e953e43838320fd3223dc78b0d7d1e58b856e4cb1a68. 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/CASD10800932.