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 0x1635db0faa11da706d116af1e7868dd7cd9c2bfd67987eb4a955c8d4bc33a33c. 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/0cfb9cff-e45c-4e4d-a1d6-32bd006f3518.json and https://artists.proofprofile.net/proofs/artist/0cfb9cff-e45c-4e4d-a1d6-32bd006f3518.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 0x1d1ad169f9c4c10fbcd71199fcc539c5f1867ace57e6ccb3a6c3dcff09f7e10d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USJE61303306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10553cdfd78bdc2c1c8d49289690e07e140a2b609fa5acf01cdaf65f5aef5ee. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USJE61303307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63abc160d6e0afe96d8dfa22e5fe595cf8c77c46e9d6af8c94f9b964b0ddf7b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USJE61303308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659e9fa05f7b0280e9bdcc6ed9b60ae8386fc6bcb06b912cedf3866a128134a8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USJE61303310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1925d46694ae8d0401f245e8d96489dd2a2964f538d20b95fa48fc90bb3a84. 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/USJE61303311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e9f660855077de35b59a7be749c8ebabcf7a3e3a1757d7301b983e2a570c46. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USJE61303312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dcdf6efcc7d7fb5c5f51780bd86305f805442c27c809186a1f73d777319e5e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USJE61303314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4633114e9a2b1b483dd13242ecab509d169e7a2c4219611c9a21ef7c26a8aac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USJE61303315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92fb27f523979d9476078f3f2b9eb4ad890cef52c22bd7cf48e91122df5ead7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USJE61303316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebea9fa7aeb594bdf4cdfe82aa5835f18aee1fadbad418f5bf9042279381703. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USJE61303318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c85ddbcd39dcb811d3bda26a167e4d345677d6b2defb14779b9af64880746e4. 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/USJE61303319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f75924496661a6c71a89b4d4ec0897cc2dab2d99b0d6c21d5112e58acad0844. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMBZ0490003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63abc160d6e0afe96d8dfa22e5fe595cf8c77c46e9d6af8c94f9b964b0ddf7b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USJE61303308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f6174d565606a9defcb8c5305fdf5706187380d7f96c68d178de8faf279e09. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMBZ0490005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10553cdfd78bdc2c1c8d49289690e07e140a2b609fa5acf01cdaf65f5aef5ee. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USJE61303307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42fa393ebc6adce9db0105ff8c5128ae76f4c6df63a6fa66bc890470afbe68b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMBZ0490008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1925d46694ae8d0401f245e8d96489dd2a2964f538d20b95fa48fc90bb3a84. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USJE61303311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4633114e9a2b1b483dd13242ecab509d169e7a2c4219611c9a21ef7c26a8aac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USJE61303315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dcdf6efcc7d7fb5c5f51780bd86305f805442c27c809186a1f73d777319e5e. 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/USJE61303314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92fb27f523979d9476078f3f2b9eb4ad890cef52c22bd7cf48e91122df5ead7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USJE61303316.