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 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 0x76f204c0d16029e20ad3f6306afa24834599163c728bd414e9ac5ce209ab143d. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c9a27c1-cd04-4984-b252-186587b85c93.json and https://artists.proofprofile.net/proofs/artist/7c9a27c1-cd04-4984-b252-186587b85c93.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alpha Collection, Vol. 3: Choral Music from Gloucester Cathedral (Remastered)
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 0x367ec0e6bebfbe1e673a84f546e17ec7615490829d3a62702a744d8a5a77055a. 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/GBC7N1042412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a524417553c2b71fa2fe6eefb0313b80a753320282b3ab2b78400b1da28fa6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBC7N1042411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d10efcbe5d7d701b17c8caac54499b9702431c82c99018178fc1b1dc50d9d93. 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/GBC7N1042413.
Battle Hymn of the Republic "Mine eyes have seen the glory"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5020e9d9fd4fdf959c86485bca440c77df4a231a1451ad527e69d25535f3c4c7. 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/GBC7N1042415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c489b204eea58ffe200c44bf798173317cea6507657de4f388d19b900a9d22. 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/GBC7N1042401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbdb9a3716834df7b287a25bd0e17214b7ad54896aa2ed480052f10e9bcf8d8. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/GBC7N1042405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ecbdfb612f209c4ebc9976915e5428e4bff13a627896897b4eb05136944326. 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/GBC7N1042409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c32e988c60504be5e686aca1c077bec23e45fa284e3467779c35f272fa69ca. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBC7N1042416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6ea5cde2ce45d888a4819378ec03f8abeb31dc987da4d5b65ebcdfd01c5b5e. 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/GBC7N1042402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc81becba7d3c7a3b362dce3a4683022804d64a9675a0be1127a78d14105c14c. 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/GBC7N1042403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a733b8149238a08183b86240e0370cfd45b44f327a15b4a9b8c2c501788151. 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/GBC7N1042404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc099c4698920ddc3e220ecc94f59ae133082defeb34b40014d995d3626d26724. 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/GBC7N1042406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bbead885e748da734376651517fe287582d63aa07749ec4816a62baf79e09b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBC7N1042407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085b2c9d6070bbaec74b4b40fe3c69e04484a8d673bc3980511aee4103411d02. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBC7N1042408.