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 0x291abce5fd91842a5ca6035af2524ecaf8ed948f7bb810f43d9734eac529b5a8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58f2faa8-d2e3-4c97-8a6a-f2a7c4282aa9.json and https://artists.proofprofile.net/proofs/artist/58f2faa8-d2e3-4c97-8a6a-f2a7c4282aa9.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 0xbe698a3deeceda2e3cc7ef4ce41ac57b3e4ea4ab0e5aee9eb2150d00dcdf429a. 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/DELJ81354891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3c46a5cdbcc83fb2bb306a8fc0a7ffc840aa4e3b4168bb3e182075f6ab4ca2. 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/DELJ81354892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3535f496fdf61dac7b1885c486436b92f4ba160efe2f467ae1e7a203cc4fca17. 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/DELJ81354893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf9e7eeb1aa791b58cd9af56d296f31b52fc988f68927b8a8416ba5111bef68. 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/DELJ81354894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc1ef6d53c7d5000d685b5475cf6d222942df290eb3d51902f3385b4e5ca032. 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/DELJ81354895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b970f311ba2016e0f04e4e6f8a121be5abeb6eb1a398f40fa462d2ed19f2fb. 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/DELJ81354896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae0d479b548e07427a7ba8dcbac8ec77a9e073704046a9b2259f58dc2ba8225. 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/DELJ81354897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f9a33e9295a9388c950219ef2525915443d1a62e86dbcf9cf8ca027cfe2ef5. 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/DELJ81354898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a1bffa37925deac761c6a9a90a6396a0a27e7e1f44e8b3b44eadfd40074df7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DELJ81354900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b5972fec9fa2de25f0fb5dff36f99c65e5e8af6eb4b8d47efdacd2e7a1547c. 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/DELJ81354901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6496cbc906930349d4d8ea52c586f4b05487a1029cf136f49d3e20f7e9da16b. 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/DELJ81354909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7e4196a042e4f6b3175cbdf9c856e7d6faccd59cc4d82c262dc4c3c0e2f249. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DELJ81354912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3d7088f64c9031f8f3791a3c5be3c65b591c631cc40520fe9d5ab2bb0d4d0b. 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/DELJ81354915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab057590bf39422d113f14650be4b654efb0258b7a838143ff3ffef0de71a2b. 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/DELJ81354916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d8f5e240d663e594e599f3ee773b7fff36d5dabc9111b2d1296e658a6bca08. 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/DELJ81354917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c9775d91adaaa6fffc8e71cd034c3b8c79c20cf5444a418327be423ca78a51. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DELJ81354918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe57a48f693b99d204e287baed455d0941d7e682e1ca4943d8642f500f5f8c8. 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/GBMA21863791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3db723d6dc3035a4b92b4210f7a52bfc8f6b3124f4e0c68e3daf7f11a0a7f7e. 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/ES18B1805682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0416239f71fb5ab6115ae7f4af42787a99ca764371cfcd7082a2c9723c1f43a5. 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/QZW9K2470763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0316fb0c55d48026c0d44abebe9d75367cda063f4a29c97b5894c3bdbf2fa23. 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/QZW9K2470764.