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 0x8cf266f865b1c0044c8f18a6e522690ec48310d2e96067e75a6de1e37cb533e4. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17d977aa-43d4-45e9-b57c-5b363a42a892.json and https://artists.proofprofile.net/proofs/artist/17d977aa-43d4-45e9-b57c-5b363a42a892.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 0x8275699f3b42c9966bec2d186ad53bf6d16df1bfda2bfb055bc32fcc1f667fd5. 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/SGB502559907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e5ac378fdb7e07f2acf2cab934b0ac330b2f41f9999c37d6ad5e1f8f94f4a7. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/SGB502584005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4763224a499a244d01e190cb58170f30e0598f13b774f8b32b3aa65c6f2ec8d0. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/SGB502527638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b23a19852c8e94e5130d588d694813e4cdbd600d530a4803f45e8e3cbb7568c. 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/SGB502512941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8bee05ba57517691c7071c301511d3241a8efcc689c0e8e231f6df267195ad. 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/SGB502569914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8566d1ae7032ce7b3f32eb6516d0b67aabe0410cb8b1fa0cab580d615602ce81. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:21:57Z), 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/SGB502514675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3254411255ca070bfd828c565a271f7537645bb63e9cfd471fed118ffb111e67. 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/SGB502538417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513b4bb98991755d8002e430757036ef7268fa6b9641d4f415b94d28b7dd8015. 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/SGB502575128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9aa03c5c1714d0b48a0d94f85e22f4f7d08a45afb1ea6ddcaff4b4ed4c602a. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:33Z), 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/SGB502565440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f68b2b87238cb9cc6f007c1d605400198b5e17606dfec5834b9d6c08638373. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/SGB502540551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa9457dbd1c7d0015fc893d19acfd07b9858c272b71aa48d9266b396d6e7e7b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:19:23Z), 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/SGB502527465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d083445cdde8126c533f5ad4e35b7ac9947ba84d67a2c4775fe15f41efd865a. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/SGB502563315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1079265c36c271a016a2b0a7cb7c8cf5ceb9c703ba106bb968b21ebec7fd248e. 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/SGB502525660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ef2a99de89561f02ea3ebf9473fa3d0e7712e94477fa473fbaef9088845588. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/SGB502521083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c93a0c6ce4eba3bf8a841014e66f1262a7e6e7ffa96307b27c9c50446d33bea. 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/GXBAV2563849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646b7327a24a5253f9921e39a8efb45b7ce2f2ec8ab8f3b461fd9779700a94de. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:45:32Z), 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/GXBAV2511351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bcb5aec20cd594a285758f6dd396de59c2688f4ee3b3124fde1aa9615d39d8. 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/GXBAV2553360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffefbbc65d9946d08b29d65d2fa7c61acfddd5ababa6b0fc6dff51cf96798c7. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GXBAV2557181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd5136f8b2cbc8b1573fe5d0bac1ea2090c350aac471dbe502fa99b1ea5cc30. 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/GXBAV2517570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388559a20ab4b0d5aa1084b6c3e0e08df18d5df0de269678ee60b8dd234a9dee. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GXBAV2543828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064f0c02326aab826d3ed9583ecd15206510a1d5cfa0a2c22a25cebabe3f7c53. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GXD7V2507017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbb871aca42f1f76128a7b4dc50dcb1d9a9621defda37e44e1f6412aeec9f59. 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/GXD7V2500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92fc69b5e6de9ac6b17a20497477e0822cc725aceb3e095bfe0eb84df9872a4. 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/GXD7V2577078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f7250a178577c3f27d372f14624b665dbb742fe7043ff132b14bfbd58e5862. 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/GXD7V2501596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c484a812ae6018e5ff2a6bff682ce8ba87fb4a9e8da3140e6fd63bdf737e991. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GXD7V2556264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db0528bba3bacf85843cab25759431ef9ea7f1e985b6b5232a5451b6818daf4. 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/GXD7V2599204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1b16e26a86af610e7d74ec9d07011ad38343feed8275ef112648445fcdee4f. 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/GXD7V2591649.