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 0x56097fa0ba56661959a36f9b3999d56db2656c558cffd444ce5f7b00594984c4. 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/92565d9e-d4de-482f-9ee6-a7f657a18c67.json and https://artists.proofprofile.net/proofs/artist/92565d9e-d4de-482f-9ee6-a7f657a18c67.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 0x43dbb9d22db81e99da1c80875c0bbcf0394633d73e7dd868c353398defafce8f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USHM21751571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf395d52144461832c4a2533d87b11e78013d0bc2fc4b8200d41bb1150ffe9b08. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:54:49Z), 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/USHM21751573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ebb7c9a48105498226c35bf71017f03193587fbdb9669426904078f4813a8a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM21751575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88752b75aae5618bacee44ebd8bff790cf62d39f1def97f416e29bf01762675. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM21751576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2e2e1d11105b109273e639eae83412ba219cda8bd6b00f5307ab0c42825260. 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/USHM21751579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0cb3a848a5e4503dfd764a73e584d3ecf7df45ceb427b8b3c3903835681470. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USHM21751581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfe177a2ae4726d10cc2f5f719e48c6ea74c5f163a587e05357aebaeb1a8366. 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/USCGJ1809973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfa066e58adbdb2e2e84c4a87f03b7def8b7e349ad3fb9d942ea6f20c79daac. 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/USCGJ1809976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff55802f4894a39e34f285287ca2da2ce4a485f19f8ba2b82cfd37c9d4091d85. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USCGJ1809978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a29d87fef9b5aa79ab9179f8b5f4cae03c9c23b2f2c78c30bafe9af60a445ab. 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/USCGJ1809982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab9874f76aae73213638e03dac1804ceea7675a375944f89e7296d9c1b0e4e7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGJ1809983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4354a56b0133012af29b183083c1b05956812830eb489733234bdba32a5118b3. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:42:44Z), 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/USCGJ1809984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac308c5333b98c315e8956009fe4069835dd62a92e4755da45e6cf3005b9b9f. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USHM81804804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60b9f825345ecd9c2da94d89cc1259a872637c63b374000b8a5766e4988e1f4. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZFYX1950395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfc56e61648965d5b532770041259e4c9df673d9c0a90e880c20321e60c3680. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:06:58Z), 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/QZFYX1950400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acaa73b4232b823641104061c93f85dd9f31bb08b9e48411a4d9b3288cf6b1d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:04:46Z), 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/QZNWR2164125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522a3ec09fec4c3ec92dc01ee78524837612a468c42b77bf66fd5465804c0176. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZNWR2164137.
Cello Suite No. 1, BWV 1007, Prelude (Harp Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399d978264c49e7be8aaf4700e61685f4ff09a80e67dc5ab87eb3273004abde9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ42425542.
Nocturne in Eb Major (Op. 9 No. 2) Harp Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb743022e468230192473a220f7f9fddd522b3256245fedf7bdeb271067f0aa5b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT3F82578445.