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 0x0613e9528c33b0616728aaebd95bf7796ce0b7902cb54cfabf62c5fdbb6367f1. 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/d4f1c7ef-06b1-47cd-9212-135fe21a7a91.json and https://artists.proofprofile.net/proofs/artist/d4f1c7ef-06b1-47cd-9212-135fe21a7a91.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 0xb2990e710cd70a5854aac6882364740f7a7c40a29e8176887909743de3cf92a9. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/TCAEM1951299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb261a4a1ec285986ae6712aad1be1246761e13de3d66892ab81178c158d9dd8b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAEM1951301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8437349f3878d5308b995cc0d9a9334e2d442ea9ee4742a860d58d2971cd21da. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZC62114372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be160337fb1b86af1ec568d6eaf8833bd3e3cb776c7aaf590c3e4ac4478b3ee. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/DEZC62271313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9207fc7b21c659b3b78ce70826360a1b7f3a061e053b08f2b701b40b111b63e. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/DEZC62271315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c7e35b601f78b86a47e4aae0efd01d6032416389c008f837c4f3edd5bde6b7. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DEZC62271317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6259113e4333900520c12c5edf58380f6b36386f001fbb50d02a4409e6c7b1. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/DEZC62277015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa375df2edbf7404f720e25aff431d1cee0d11db6a515ec8767d206fe436b0b0. 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/DEZC62371893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fa761586ff2a9b9f34572c366f342fb311dac570af009fc5a405a1df502fc2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZC62400530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bba358c7da0e9f1b8f96ee1700a2d642b87f13b96e549789061ea01f1a82c76. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEZC62408193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a2c2716f2d863faeba2ed217e6e4997a3c9541e89e0f7e0ebfded03efcb60a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DEZC62444317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fec055af3ec29ec7206fee03bcce105fa7e20ebb3d7ed92eb500ba644c8043f. 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/DEZC62458760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e51b83dbcf2477322df0e36b60478e0a7b3f29473eb5c1256c620617227117. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEZC62465284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de313ad95507a21c6b9d7b2cfc7056c07238a939d751915bc19f75b906bf2fe. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/DEZC62465288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be1bc235a0e52a866776ddb0aaec9f4d94fbb717f5c2b8fe6241c28b735f7c9. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/DEZC62465291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2a06edab97f332e80c9f72afaad2bca5d2b54149e6a7c1e842d1554cdef2cc. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DEZC62511971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc664177aa05e0123cb839a8891e9facb4c5a297b68a1374ee24f50cd28822b68. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DEZC62511972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f8d0cdba9666818ca2d384cb286d81882d052290737b5f6cabec2f8b33871a. 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/DEZC62511974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b7dbbd5cab28dd1374cf7621a29bfb5c154339cd76cbb680bb7231b392ebb7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEZC62511975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe43fc7c174133644549661680445979c935312c613977162c56c1a0251bff2. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DEZC62511976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0cec5e96b4aa6fa4367dbeea50cc81a516955f4fdc30892ca9490fb76f93c0. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEZC62511977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c92940d8b4d5225ebd41a8250df6f825175a15cb360ef419a850942944ea969. 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/DEZC62511978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b2dc204737ce4dfc3758b1b1663057c8a7ecb5e4b1fbfba2846d022d169f4c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEZC62511979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90967670e7d4245f62de135a15a698317ea4fe4ce41fe21ca39a3c36569add08. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEZC62511981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fef394c1e2dde4a89cb1371df6af0be170a5bdf9a161c44fcbe5bd257401024. 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/DEZC62511982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785825a4d77eb286e10722008a90b173361ffa6e16aae0758be680f07c84dd3a. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DEZC62511983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439876c764e5b8cfc35952260defbb41bf4082b9da7390bc41281fbf5ebda9c0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZC62511984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46c7cf6d60deb0b1dca7584d09b74df8bb2ca6a1f789d412c8f35a0c388ee85. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZC62511985.