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 0x481260cac826d2afb32ebe815091e730c640bfd9a193cb3d2152a17a1e0f24b7. 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/e83c8668-d25c-4ab1-8094-85ec3d3331f3.json and https://artists.proofprofile.net/proofs/artist/e83c8668-d25c-4ab1-8094-85ec3d3331f3.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 0x4efb668923e9f94d8baf9ede12b5901e05462a83a6b38b460453cc22acbd5504. 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/SE5Q52100473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba1e3112ac37c505e7cd0491a933528b4d8f879f9a967de5702631a3f02503a. 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/QZHNA2125081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c263b20e15323d672b43c69add2cbef547c456496aafdd503457abab90dda48. 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/SE5Q52100989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2dd1ee0653fedf70ab9834bb90a465eac5480ddb0c92eada31b2fb880e8cbb. 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/SE5Q52102515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71790e3df9398be9b642bbdaf60db4a38953aa88acb6e2e83a43e41ea95d1960. 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/SE5Q52103670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3770349713cd53a8ce819c74cd2ba512c99799fd79f6c5eebbcf40555b8c6b2f. 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/SE5Q52103976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05af0200fb548751df3d54109519ada8cee62e714a5d2cea333aec32457cc23. 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/SE5Q52104330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684193cc71a6e38d695ff919300ad6ec142d6e829a7d40812ca1daec0ecca416. 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/SE5Q52201275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cef0a7a1114f76fdaa2e8c509ba290d679a87b0e7be59315c0646ebe8a5d10. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:41Z), 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/SE5Q52203296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18541fdc032cf5df97c0ea56e86b9b468cb90de0e3899ed80e5f4d7ebe27e99. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:31:14Z), 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/SE5Q52203416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187bf5bec3c97041ae291962a3f4b981e2cc148cb96451c788648e0b9ba74659. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE5Q52203814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15355c16abf67cd56af01415006222c2541437cfe5871def6e4991e1c2a97b76. 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/SE5Q52300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbb01a911f3011aaecd53d71dee421e8163fa0c178ebe500332e3a1b0120cf0. 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/SE5Q52201993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1976a04b5bf55145782a88308ae269f33a620020e12901aaf391daa6d64cd754. 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/SE5Q52301853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b437fa9797ffef7f24988249e2dd09ac2fd8cc34d947e87d7be0fc519338fc. 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/SE5Q52303411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5283c3b049bfa566b85112497c0574bd8dd924cd3e0d9f25cb01b1b14f74876e. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:34:12Z), 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/SE5Q52401216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99371f2ac370b65ff6cb5faba05aadf871381f34dc9342cb62310bb4a26ed43. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SE5Q52402164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56db56f441034627fbe7570b6df5eb2470b536709ebf2fbdaf0ddc7a7a005c0. 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/SE5Q52401882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dea125aaff3ca9f4d79e7ec4b54c1a77a58bfffe6647df7dcb47915dfa12d6d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:50:05Z), 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/SE5Q52403153.