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 0xa155c56432a5a25c678cab9802acdd80ecae14753619bf31c4646cbb5becff0d. 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/25d075aa-de88-4124-819c-3a9656fc5df3.json and https://artists.proofprofile.net/proofs/artist/25d075aa-de88-4124-819c-3a9656fc5df3.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 0xcb2caeaa9929ebf2b738bd10fc76c21515a783ad51cd211d6fd4230d782039c9. 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/QZ8GX1700814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d205cd1d0ec61c553c96f32502e9a70540851da2844de53ffb62c2489158bab. 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/QZ8GX1700790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a81fed23e093c8776610892c5d28f3bcbbdb6c1aa141965fb05c57e57ae7eed. 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/QZ8GX1700815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d8de46e2bd3858eba902a2d649ec7852979880617ee0a8cf8b1de4e40f793d. 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/QZ8GX1700759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7a26276ec4d39bd518cab45f8153009950a9052f8a9dfafa7deecb684f534b. 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/QZ8GX1700804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1059986406bc09a35cd57ba9ce57ef177006c9c0ca739687591b68d870cce2cb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZ8GX1700816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c49dd1e67d873e6e605820877c6b482a3aaab6ae806f9c8568127210fed482. 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/QZ8GX1700817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e32725ae9c2f34b144cc3bfe01f99bdc7b5e0aeb382c8f1affd5272dab98158. 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/QZ8GX1700820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eec88c6d459b3b0247c14b19127d7c61eb8bde13ec102da83a3b31d5eae6e40. 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/DEUQ51600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf283bf0c0f15e034154601f42cf7ad25c7231428d5d12e66e516ec3a5fdbf0fa. 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/DEUQ51600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6eeb2e8a260b07c23a78bfd87a0f97ca354c78dbf69695b98ee8720b008bba4. 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/DEUQ51600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632e8d1c0dc626dbc8d06c4ff792f8ebc1e0797490c4063be20cf409238575b1. 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/DEUQ51600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a346bd439e23a593042ffe088cbc5696bc2b566313b1722ed8baf8b15c492b. 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/DEUQ51600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7a26276ec4d39bd518cab45f8153009950a9052f8a9dfafa7deecb684f534b. 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/QZ8GX1700804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d205cd1d0ec61c553c96f32502e9a70540851da2844de53ffb62c2489158bab. 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/QZ8GX1700790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d8de46e2bd3858eba902a2d649ec7852979880617ee0a8cf8b1de4e40f793d. 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/QZ8GX1700759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6eeb2e8a260b07c23a78bfd87a0f97ca354c78dbf69695b98ee8720b008bba4. 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/DEUQ51600009.