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 0x734f2f1fe5d489be6b227bb22839efc1fe1b466af9d14f1f19086dce162616c5. 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/cce9e416-f1ff-4065-b3e5-905f8d49a806.json and https://artists.proofprofile.net/proofs/artist/cce9e416-f1ff-4065-b3e5-905f8d49a806.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 0x81ed854c527593c714e1265a3d87ea6d2a71eab663b2ebb3d2056f9f0de8ba49. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/USCGH1536705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3286b34702aa5adf9c6a25c2c4c0d53f0ee1a4776b768e50c4c355ab4476630f. 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/USCGH1536707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d45b83fa162be332afed5fef5c19e5886f35303e3d862b2d5c6a8f7f2975b16. 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/USCGH1536709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902ffa891cc58caa5817d4e02620b8ca2b312e60b027be1aaa8934dfeac9ff67. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:16Z), 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/USCGH1536710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9560a4324241f053a850f0f3b4d28dda9a1325e2e7eddb71e012594f6bc59c. 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/USCGH1536711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fc6326d4b526839d3abc281eee5f774a2f1f0b027bc761f59a9356b17402a0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGH1536712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81e9ce8b171d8bff76f543e18811e9a2a7d380d42873012fc1a630bef8b4e21. 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/USCGH1536713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f4fe9da266258fb132d494757d924cc1aa1b5490c09bc53a3bda3b84d47df0. 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/USCGH1536714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b54a65b52a2293a8cfa74d010f064f76747a246b005de1544b0bdc971d3a72. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USCGH1536715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4369fc6fdbf465a6fdb827615efa1c7de80c3c5f426367bba668765ac472773b. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USCGH1536716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165dafab53af221e97ddc99d3d364349f295962a1a29cb8dfd3325cd79ee8fea. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USCGH1536718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecb9dbcdeb29efeaa33a1ab4d9b7fb3165fb140b7e4b4fc25e3a1ff9543f40a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:26:57Z), 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/USCGH1536722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fbd9e923729b13b01f7d6166ebd75a97fe2ef5727acb2b9ff8bbd48a32f359. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:30:28Z), 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/USCGH1536723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41952a45042f42bd11b47c05745e9e794e1f990a32072f6e782dbb0936966329. 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/USCGH1536725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7057a8ca10d06653a63e76e80fc28eb1fe0297747dd00c98621b59a951b94a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USCGH1536726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d7ade955cd9f00647322c876953662d3b43196236a47615eae156fcd030013. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USCGH1536727.
A Certain Quality of Light (Original TV Series Soundtrack)
A Certain Quality of Light (Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738baca995e74f702142313bf311401873977f1be392abe7d0e7bf986356a749. 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/USHM22534170.