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 0xf732262a1503c1b7d546bec7200e06cfe2e2508115ec26599cfb7a6ac7b74243. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e86ae74d-7802-4095-b90f-88baebd4c25a.json and https://artists.proofprofile.net/proofs/artist/e86ae74d-7802-4095-b90f-88baebd4c25a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Westminster Choir: Favorite Hymns and Anthems
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 0xeef373e0337541b4e26494192e1acf6778fda7a18ca1781eeea8804d3f939178. 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/USB8U1064365.
Paulus (St. Paul), Op. 36, MWV A14: How Lovely are the Messengers (Sung in English)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051e5ffe7961442fb5ebe1dcbc028d4d7cfe781257285875d49a36f0148f2e3e. 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/USB8U1064367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f22f48b87a2cc366e3bc3267c40cd69889bf59d5731afc297ce600cac31003. 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/USB8U1064369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29fe4355755d49cc525d71fa352fc639416e2465dcddf7321913a46040b7ab8. 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/USB8U1064370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95b874e80d95b2fcb2195391225bba6668f52cc67b70114e58433a688b43705. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USB8U1064372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48269c863085fcc0883c3d3add50b8d6f4281b26f6a3d2b3a7cff4b9e23bde62. 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/USB8U1064373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe01609c23496c31a191554ca1dca79c0631c4916d071576804cd495a10bfecc. 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/USB8U1064374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650f6b2d134cc8023286abe369049f1b5035411dd5af6353a2a567fdec3d43f4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USB8U1064375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156559a3abd9cc786ebadfb88fe157770168eac8fff5a43280610bb8d9a0a77e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USB8U1064376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa679cba9b8eb7d320d012e635f6fdbe0aa8bd30b924c450d79482bc34d950a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USB8U1064378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0cfe23b3ef268002263989ddfecc5e9971f94f573acf5739153263e0b0ba49. 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/USB8U1064379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31b1aca71612e08dbf07a1d3df0c2958aa6afa2ce9eedfca72c3060dae61575. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USB8U1064381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e2e34c8521618ba5badaf26a9a44e902311eddb689973845ef82ccba1365b1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USB8U1064383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34596efef88a76ee1af6a580a838cb1953b6ff72de7e2986721538f59e75aa4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USB8U1064366.
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 0xf89fc188ed9780987e0d3e17d762102f2417561d839404551f7affc8b582b835. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USB8U1064368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de7576610f1925ace5a04a83a852e9fc1d742cf1ff993c8b2750c62ef43b2f6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USB8U1064380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be6c22b70c1f5f5b02be13dcc9b67c02cdd5885e3ec1b3966ccdd6db5994c29. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USB8U1064382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5c2fb84b319783da2e3cc367057b42555370fdaf1761322472c865d9f2728c. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USB8U1064384.