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 0x3a337f74801adfa04ca9c7c772012e71ea7a597b41fb4e4ecb6350e7eb935f0a. 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/d42f2118-4ec1-4faf-8468-d4ce1c76730f.json and https://artists.proofprofile.net/proofs/artist/d42f2118-4ec1-4faf-8468-d4ce1c76730f.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 0xa340ab4a5e623d757976696e112c442d258c3dde48ebe37f80f90ec556d513c0. 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/QZK6N2205713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c99f16ec90ca3e1f847bb2946b3fd09b1ca9c82af6206cf1084c18eea01c3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:06:41Z), 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/QZK6N2205714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0244c98b9a90fce2100174cfffd9057156d75f60e05387342ac6b31d4cbb8f31. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ32313698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c400b59ba77b3108d2f197ee40659f19bfb3da94da230a7a7bfc784977f55f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:21:32Z), 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/AUMSZ2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7d71278b568bcef9c728a63dd98cd7ca510e66cd1f0d0bbaacfb012dfadad7. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:42:38Z), 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/AUMSZ2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709c21ed4c4e5d262837d961df9e71fefeb38c3948fa2d2ff0325fc0df8b85cd. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/AUMSZ2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0961cb349974bf3248707009912cb3707ec7dff852ad8e604146125d1530181c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/AUMSZ2400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ffd1dee597e36a0f7fb3966db45783f5fd009e79a874cf748933e12c27e631. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:37:27Z), 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/AUMSZ2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993e606f628766197e6ee2a1b156119942a97fe8b217264a4bd9b8adfae3cd88. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AUMSZ2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28793a1f35a086fa662922cb0141bd207bae7abdfb5af79be76fb113a787c42c. Chain 2 (Bitcoin): anchored in block 957737 (2026-07-12T18:02:09Z), 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/QZS7J2466183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423dc91cd9dd8afbbaebc1f8ad70d4c336494d2c32e09b14a124ac6c322107bf. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZS7J2496101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28793a1f35a086fa662922cb0141bd207bae7abdfb5af79be76fb113a787c42c. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZS7J2466183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc897dcf6b93509ac2f6c833255ffeb2c97018b228bf9726cc150b1db9ce13aa9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZS7J2559709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e24b61d65937bb99303725cdde56cb0e9714318c2ae0a8a68b41ccafb6d7ef. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZQAY2504746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01d3a58c35132245b76bf41016046a9298199dcd1e831ec9640b9649d360ad0. 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/QZQAY2586119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e45e8573390d63fbcc95045f76d3c90aa30dae871cf5690d1eb7514cb696d4d. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZS7J2509941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb2d2ce1f51ede92cd1d99d4d25a8bf59319d0275638eeccd1a6c8ed4537002. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZS7J2561930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc897dcf6b93509ac2f6c833255ffeb2c97018b228bf9726cc150b1db9ce13aa9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZS7J2559709.