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 0x87ab49fbdf0f3965dda182bab5c0c326d89a5e1641638f4c04b00cff0d16ddee. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/438be9ec-e29e-4d48-b79b-84611a8a028f.json and https://artists.proofprofile.net/proofs/artist/438be9ec-e29e-4d48-b79b-84611a8a028f.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 0x97209a0a6c0adf6497ed41023bc93e50da8e8513f4f8be23541e005b39d3455a. 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/BX0BA2000186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b103012e0d9f2e6c77efc653bb6565eae3ede52160ea619b06ebdbc916b036f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMHN2219917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61a61d865b2ce4962e3cdb634e6f7f164dbab9223ef0a8c54f755d6770deb80. 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/GX38U2211698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19353507b85f0c19aad479339dc0cbc881f1d9bb889406c1f5a3fff2dbb60b41. 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/GBSMU9669641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9501ef84f24504744507b033b5719a13a29822013903233894f355b7bd6ea7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GXBDS2327393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dd7a4d2cc383c3c7368ffd991668d93c1bc55e941c2c0b77415585bb93a2a9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GXBDS2339421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74566abb5bdc7ba01562deca16770ec892d67d727185bd3153308075edb6dd8b. 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/GBKQU2335820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dccd22b24b6d770a0c11c0f9641a90e40616352ec01ef6830e309f229bc1de1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:47:42Z), 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/BRUM72300459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf18f2ba3b82b23991e012e1b5fc1d18e3a75dc56091f148bf1231bb3b89b074. 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/QM4TX2221096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa3dc63ae5c3d92e5f1d5b8519037b70ce4eacc0ecfb42cdeb9ca3e95ba7995. 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/GBKQU2103184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb6c3446678b22840240ae194d4aad800ac923674d5a057a6ad8e09a4f41de8. 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/UKR6V2050035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95b72635c4b5452dbede6fc789ec6e5300d6db1f85c76fc360564e72f14a041. 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/UKR6V2022641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746803958f11ba2d8bc48ceec1c04e25996ca6127f0d0561dcc7675c798f3409. 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/QM6MZ2081970.