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 0xfb4646806e676c369b2d784bfb3d19b68be0dd46dd861e06e208158134bfa10a. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9750c783-52cd-4cb1-aabd-597696cbbe93.json and https://artists.proofprofile.net/proofs/artist/9750c783-52cd-4cb1-aabd-597696cbbe93.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 0xd04d44b84331c46599057c84436e52db3ebee7e6768ba676faf3deb4396343e5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZV2N2219421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4e2b743a221a133a57b0fa1791f8b3959802583265f4a571fc100fe6e4a39b. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZV2N2219422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c44beea582075e884426a9c6b8c4017a27ce9a8d0505de1f1090a6f08d9cc0. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZV2N2219420.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa25e9fc8a289e42b71984542375c5f8febaa1b0c84c85e278d317e71b3a311. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZV2N2219018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dbc96df26401261ab37c434c1b49e433cd0c7f0d698231f157eb7ddbcea35b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZV2N2219092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf14f108ac5d1ec3b27ae34fd78dd6bcbf70585974506b566f5b6a89706e574. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZV2N2219094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0462a3e03aabd038fe1481007d5bf37a485e52ee1735276a1d82bfa8bfb0972. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZV2N2219419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7463f1632ac09862cb84a5e74f0e0fb0ea4aa5fe291e98be27bb7fb50fa55bbc. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZV2N2219095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd497e66c91419e8d117db7cb913279bcb9d3ba1a87f03e38529f6a50ae0a19a0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZV2N2218633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cacfc1d17f148bdd8f65e8929767ef36153817d0df173e4061e0ea764a638b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZV2N2218631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6b562f6ab8519722ca675d0afd7003ec139373e894eca96825a1b83a51e5ff. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZV2N2218629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f51f5bd274e05f7d098d18342f7ad62abe7b9bdda38773a03eae4ea74876dd. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZV2N2218630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faf67022d1f3cdb701bb6fa753d11c25ed171369eb1059ac963e001e4faf244. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZV2N2218632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75abc07a6550e006d57586ca3b3a7caa2166967d51fd5b97f19b77524e299ebf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZV2N2218634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094ba1ec5f11f520f32034e4bff339f028467a1c2b2d2d98fdd811204a82c83a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZV2N2218637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0229263b26e9910e58ea988af9746b9575f12206eaa864f4eab8730175d3f9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZV2N2218635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cbbf5cc53eac5391697927437f779f73e3bcec37aa614949cb47693dd06f54. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZV2N2218636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd37279955c7b415e7d6c378bfead4659badac2207d0f306f6e49257bb91b63. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZV2N2218277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f23198a8453622c3ac5e3284682a2e0fb2ac1f606cd3de0a2f9c97aa36707a1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZV2N2218276.
妙曼的中国民族器乐经典—二泉映月·胡琴(1)