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 0xd402b2dccfcc3baa12e0238cf8b8cfc2456da1a039bf114281d815cba486bde8. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a12c259-3a84-4a89-866c-e5efa0888366.json and https://artists.proofprofile.net/proofs/artist/4a12c259-3a84-4a89-866c-e5efa0888366.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 0xb484e8199b67f3b99c38ab2d190d3417a6e78bd0eafb449278e30459a8ea1a82. 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/USCGJ2112480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9115e792e889eb088824806aa5e35d56a4198f2c1921077b7aa62c52bedbd9ee. 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/USCGJ2112481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368fe81e0915581418a9db6f98e77aa592ee53ca1e9e55b13df4f8995c040bbe. 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/USHM20854968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2b53725a03ebe8eccbb3f564a754612d4cc8ec28a1ca2da676cfd83d8febd6. 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/USHM20854970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e24cb593269d892bd3a98ae8f8006f026f705969910d0254d0f5a8f0b7e109. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM20854972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9404f68b9a243cbfa8d6fb7d9497859fffe02ab13805a7d8bf2f0cb61d0030a. 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/USHM20854975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c0fa33f0592eba85574a24627c8a8ca634a0c78a0e3236c60f2070c0e6fc56. 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/USHM20854976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0f6555d306820bd245bfa3c7ddf4392b0242f77d07271f312479b8a1a7da8a. 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/USHM20854977.
Come, Thou Fount Of Every Blessing (Guitar Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43899c109cdd63ba8f6e1263db12f930f8806e57217ee25adc7a8a8875173af. 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/USHM20854979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8be19f48c32421f3132cc7d1565661862192c622f61d48cf1c0c5c4db9838b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM20854981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4620e6fbfa6a420cd2a9ce51565859cdca63195e0bb8c8a005a8a5d5872451. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USHM20854969.
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
Come, Thou Fount Of Every Blessing (A Cappella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa0d488ea6fb24166052427fd1ff72c05e3f257d5afd6acc4d827485cafff94. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHM20854971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb706111d61bb7f404b3567778aa7ae0b4d6295a50bd34e2a49cd5c6ccf687c1d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHM20854974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb696a634e5840c664021b198cfdecc0f360325b0421ab89fdc18b6b865cc848e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM20854980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7e45bd3bd8f82974b2efd8affc63351b2150faa0e81cf62ca2c0a4567e9fc6. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USHM20854982.