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 0xe60de39350c0d59f35f120833f50ba21841a211aaa8329325134861d607e5832. 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/959b6e87-7480-449b-b210-472dde8dcc80.json and https://artists.proofprofile.net/proofs/artist/959b6e87-7480-449b-b210-472dde8dcc80.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 0x691c5f47dca5664cafe7ddd5369c34af3cf3f7b845ab517f290a35ef6d9fde20. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ662362410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9494f83805fa60d487885fc7c0922197a1782c780a671483a88a646bd1a30874. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAHK2384402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd2fb87819b397fbcb8c9b5370e2a8f0677b07ad1caf44409b2bc1be394ee5a. 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/TCAGY2326361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d6cb4461137cb2bc8a8d419515c1a50ec9e734f92e2213c748d0324ce9ffee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGT2323859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fba6687ea026b9e5447ffac59f71ab3ac79f664af540870611dbd26acda16e. 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/QMDA62288837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fe65a0b4bbdd056927515a1ae69906f96b4f832250e81e725c593047dee6ec. 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/QZK6Q2210294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa076bda5ca337ecb316458c1a1f65cdb5c786fdf75bd3d86aa949058c9e3b795. 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/TCAGF2266347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa574e9fd4dda2f32da76896453d5a0d3743e17c1bb9b45296a1e72bf9d8e77eb. 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/QMDA72132735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f5f9d6b4073dc45b1e6ddb95a9dc28e8c14415213f62b0ab26884cb6180b0f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFL2151132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f0acc5b44c36b18f42b384ddab85d0d22978d03ffea7a98d26b77c91b70c88. 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/QM4TW2178120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fb620fb7942a7e34446287ab7c64066cd006fb67aa585a1d7bd3fab0f1fa35. 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/USX9P2008731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1767cae7e9a1e7c8dcf71ded087c113e11c7f43aeb71c8d9a888d7b32e72e91e. 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/QM4TW2425194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f0acc5b44c36b18f42b384ddab85d0d22978d03ffea7a98d26b77c91b70c88. 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/QM4TW2178120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cdb20775bc048acab996e74c418d65a48552a857a00b8db8c36abbad022be4. 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/QMFME2242552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0001c809221c3c9b8a592a2c3eae3cfc05f26ca2ee46921ed6fc4d6eefbb7c49. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:09:53Z), 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/QM4TW2105449.