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 0xe44876a58f077e4e0d6e75579d80b6880e8087a3b3e35248ae9c17d0f4edc7d4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bd02351-6d92-48df-b269-607cf27a0261.json and https://artists.proofprofile.net/proofs/artist/2bd02351-6d92-48df-b269-607cf27a0261.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 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 0x8f35ad0b8d34694e8ad66edf49ff086cff69ac9bb238d9f9378af8b2deac4638. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2Z1900675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1d55cec8914b6b79ed35dc4a831624fcdf9e722be0a96fe3d151f1018de979. 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/USA2Z1900679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20808aa322c65f2dab8d69a23335b1d90b6f40554859782cdec6c13a9301308. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USA2Z1900680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe294c86dde6d63c661060cdc5c9e001b48cff2979a6f8ee14984a290db0d7bd6. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USA2Z1900681.
Outro (Exile on the Jagged Cliffs of Saint Helena)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fcd3c698e1eb5cdc3d93dc4d9305fc662c8cbfb5edf5fd6746436fac12ea21. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USA2Z1900682.
The Black Crest of Death, The Gold Wreath of War
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4972a1a11bd7e066c02b8f44daebf95adb2df19fbca5d7e4b0e2e95da47a99ce. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/USA2Z1901074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f92375523840a14e183c5358a26405a972e80afb1ef855c194807704733feb6. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/USA2Z1901075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be27901b11caea5b68771ae90764f1375b2cf15e61bcbb63552704f7c0fe659. 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/USA2Z2001311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a178cd25f2f9e5ab2aefad36b966f27a92bd768b7b1e38f49fa8558f01b2f53. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USA2Z2001312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4404e1c8e5aa1865ca20dc83c6a494700f884f77d97efbf8ba5f41b8f84ade21. 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/USA2Z2301741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77158ad08d769e3b6cb47b7539db869bf9deb0895ad0b383918f5ce7f11db26f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USA2Z2301743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb5f28cd01833b847a7c6206f35f6f44f7f7f3d97943e4016d3e6834431a9b7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USA2Z2301744.
Interlude (Graverobbers Profit off the Fallen of Both Sides)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1132efba489a134bef8b7b27c9e9b37b06c4b8c8aa5795be420b9526e80f819. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USA2Z2301745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8785b7dc41ddc900c3901fb5aaaadc289d3c3e84ca1d9942af91efddc105974e. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USA2Z2301746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ddf1c04a5850f7a9d18328d5194700fb4fca0492cb491159a4718c64a5a444. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USA2Z2301747.
Outro (Dragged Via Musket Straps and Set Upon Bivouac Fires)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6283f7ec92fcf1671eca05960f136b8fbb5586c10a03d5c952935705331b5bf9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2Z2301748.