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 0x8c7542f1f0b573390ec7a59784271c914e674935b563ad02045bd81df74f09d0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fff7afb-4d7c-465c-8a77-4df2aa72fa6c.json and https://artists.proofprofile.net/proofs/artist/0fff7afb-4d7c-465c-8a77-4df2aa72fa6c.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 0x401f8de9b37a350b4eb583f433e83c66bdc9abe1f1e84dd2f955ab524a84099a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM4TX2130960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562a0a83e9aa0fcdbaf09c0be027141e02d3933894d62c65cdb6275b7d0ce5ad. 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/QM6N22190446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282762c7061bc22ab3610e073d7a29a4650a109ab0968fb48a524f0edff10f4c. 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/QMFMF2141879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ade1d4898912182138d85f2b9ecc348ef0805ff872699fe1595bf471cd4aa7. 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/QM4TX2216159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44cdee28ecd99b711120b1237deea4587b3e3d54d5d9eec5fac9eb8cdfe604e. 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/MXB232200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44cdee28ecd99b711120b1237deea4587b3e3d54d5d9eec5fac9eb8cdfe604e. 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/MXB232200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ade1d4898912182138d85f2b9ecc348ef0805ff872699fe1595bf471cd4aa7. 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/QM4TX2216159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562a0a83e9aa0fcdbaf09c0be027141e02d3933894d62c65cdb6275b7d0ce5ad. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM6N22190446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282762c7061bc22ab3610e073d7a29a4650a109ab0968fb48a524f0edff10f4c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMFMF2141879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef20fc43d46df8c16b0baffda11a30b21c14cc3ea6e97c7a85e257410f42ab81. 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/MXB232300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757ee28b7decb160b0bf9743d8b9a99836fbbadad94779ae47b26be42a38da97. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/MXB232300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537b61540f34b1f4f5b65ea2e888f8b6a8a5f62afb7772ab7d1a42d4df8cf43d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/MXB232300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6d4b45a7d68936dd36c74540a75beca4b4dd656b4a494586b4e219a3b3f8e4. 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/MXB232400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf008d0804e2a98b599fc3b19551bf0f770ae7584a7f75d7f461deea809c09fd6. 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/MXB232400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6d4b45a7d68936dd36c74540a75beca4b4dd656b4a494586b4e219a3b3f8e4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/MXB232400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e63a36040d7546fffadfab2d2231403be60e760b8f5f20cfee3d5804fc55ee6. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/MXB232400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bddacd7aeaad564c525a03cc23206e15f2c36cf3c62d9b16dcc9b3ec3182e5. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:59:13Z), 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/MXB232400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52097fbce96badd05821ba75ddf9fad85aa3e37095046130f3255bb47a9c1bcd. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/MXB232400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325af222b1be1929961622c20db7d487b054edef7572c36fc8db268089a1611e. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/MXB232400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34df9d7a0bdb208a6fb31fc77c76d185f5d8d6687cb99004b9cff63bd2286963. 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/QZTRX2476921.