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 0x81e78a5e613bf34b001fb2467845edae21baaa1f9755475b1c5e236232fef648. 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/0a14bce7-2d37-4c30-90e8-8009c0009cd7.json and https://artists.proofprofile.net/proofs/artist/0a14bce7-2d37-4c30-90e8-8009c0009cd7.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 0xf542e993903542384de57e3aaeb0d86c572a83651f6d1de6f3a3bac4af9aea7d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:46Z), 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/QZNWS2288931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2634c1034986b6d3b99eb9b75a302184993d5e05a638b7ea1a8149681e3c5b27. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWS2288932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2417e0e34349cf677c1f1981d9dc492d994f2c92add2b05858d0ccab5d9877d. 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/QZNWS2288933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b07530cc4799d9dd041e7f8a9c6e52ad3a12afbb1b10174cb45b4d0485bd0a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMER2298064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd9a66eca0ed53d3ffd3b5f2a50461e1cecae15be5314ff77c3082f92d0e864. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAS2270865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd617c571e31cb3c089abb0b64fab138d1f952c23f86a0e1faffa5931e6a67744. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ32335995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa3919aa984e2aac3de63066f1f56be50ba7bef6fe6818bfc2568d5a578e6f8. 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/QZHN32337515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa734cf25a28d04c26ff7a9384aa08a3c09a5524c442850c8fafa7982ca38b480. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZMER2325969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f9acb82f559b971e508d5725a7f268275adf64dca3bcb26258c53597dbe3b3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFE2384003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d03eaeb290bfb54ae150fc24c234d05e8f25ff7e0b89b46ac8aee59288d06c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:11:13Z), 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/QZHNC2467916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5b68f55eeb47b22f158d578fe2ff75776f9e25cc8d082aa093c266e572ea75. 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/QZWFF2420715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c7173a2b946d7379fb6c2c911670ba3b01f17dd0b560a0b2baea471bcb4a97. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:19:36Z), 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/QZRP52400464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68aece1217f2d5253f8536b02ff8739c850d7165a1a9f431639ca04ef365a59b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMEP2401403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab77a4247a2e116c9c88a1120fa18b73f0b41070eef63dcae23e6d3bc8df88db. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/SE6XW2512923.