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 0xbacd626316ec0d94f92b8473159970263dbb1824936be34d93cc52e63f15f600. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c822c590-d996-41d0-ae01-4468bf41899f.json and https://artists.proofprofile.net/proofs/artist/c822c590-d996-41d0-ae01-4468bf41899f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Guqin Music "The Pure Sound of Mountain and Water"
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 0xb8e9f7e16f7885cb449647473a17de16aaa451ab029dc0343ab76ca2a54a315d. 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/USHM90982411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f43c7a36c346484c9a5421f816d63093a4914848579128fdca40cb110740106. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USHM90982413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6844ae2747355ff8e773cf238d7410140662b8e13ed7539029faf057f2dea65. 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/USHM90982414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724029c8162de00d9cd26a49369e872130cc1f44d5ace7df831ef64b52e12836. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:10:43Z), 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/USHM90982415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04e84a87d26aeea777fd4137cb72fd5a1a11adafb0cd48de35466a8b118528d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:21Z), 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/USHM90982416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc2007b8d1b6331d372c15bc704ec2bcf2380a12c7b0e3990b1ac68a6308cdc. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USHM90982417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff12c653777a2f9164715fc430abd20982cbf964e36bf5d5573b92fda506f3c. 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/USHM90982418.
Dialogue Between Fisherman And Woodcutter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603aaf7eec050cfca4169107690df02e9a81259357f8f0b2c5cd46d003a6cda1. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:20:23Z), 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/USHM90982419.
Buddhist Incantations At Pu'an Monastery
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb4506a9c04f012b3e5dc81bdcc7300137098f2c16ffe1fc9a1967c28bf955f. 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/USHM90982420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b803cdab65659b57770e0435992d20ea49ca418a502442e9c145d8e8216dc7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:22:36Z), 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/USHM90982421.
Wild Geese Descending On the Beach (mei'an)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763fd573bdfc0eef43aa03e1d6801194fbcce8bb4b04f130100618d88cec94b5. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:47:14Z), 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/USHM90982422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c1516fb4733d9d72026087ff1dd2213dfbb85854f1168af1a3dd121124473b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM90982423.
Guqin Music: the Vibrant Rhythm of Ancient Heroes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2492e96acba3fe695311bc703ef344b372c380eb41d765b52b0a6921252a18. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM91248426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981d5fac36ee5c547adb16a735c04bbdbffc4dfb1db992a9ecd4bfd01bee03a1. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:44Z), 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/USHM91248427.
Moon Over the Mountain Pass (Transposed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be6ca8e25c31b8de727b18a18f48064ce1d39f9b46f0b95942fba4f527b3dd9. 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/USHM91248428.
Guqin Music: The Utopia Empathy of Past and Present
Flowing Water: Music for Guqin & Harpsichord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa766c3b1a958656c035f01ad6089ae07ba7f1418b06818e1b442da2a59be47. 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/USL4Q2227743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530249348f37d79a43bde8c4a1fc73bf4dc5a4d2f7ae0555ef8e34b4c756bdcc. 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/USL4Q2227745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa271c001f054742c8399842cb8f2f0454ae5e6b7dca30afe04646a985036e67. 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/USL4Q2227749.
Mist & Clouds over the Rivers Xiao & Xiang, Pt. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1908c1d1bb54ab2d61fedefcf74551e50783f882c04a65337b0d1ccda10196. 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/USL4Q2227752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7d000b76970718b97ed70c3d7ea18d390533ad3aa5a9808c9bbc14e280ab9f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USL4Q2227744.
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 0x15ad32e75ab3987957c36b92a77b69e35d1f51d36d3c1d1e9f08d684529dbcc9. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USL4Q2227746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548656540fa14b6bab0bfa6145fc539b4445733798f135bb0ba8f33578005948. 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/USL4Q2227748.
Mist & Clouds over the Rivers Xiao & Xiang, Pt. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08721a82f1c5fb02a567ac8677727c33b097003e69b62961244f8211672a2402. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USL4Q2227751.