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 0x2853b5b5a05caae5aaf4eb43e46037f25a5fb29f3c63a4055fe582fe82326b0e. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79484760-70df-4f42-bc0b-f4c001b1c3e7.json and https://artists.proofprofile.net/proofs/artist/79484760-70df-4f42-bc0b-f4c001b1c3e7.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 0x02d7460717eb1911e567457495cffc18b229fa65d33a32779d2dde539ec81eb7. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZES62385997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b55cb95669972e6868f8aaf04e2d4b047d64467b94da1c295fc774d6d1f7e8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:52:18Z), 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/QZK6P2325975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e540c1655f3a3383ef2e5e3f34c0e3fe92b16868be0b17cdebd335e9b86ab0. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZMEN2353349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5411ecf440ea095f70cde04466a72a0937904ab4862072cfc8b18ade0f5da5ab. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZHN52471319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d7460717eb1911e567457495cffc18b229fa65d33a32779d2dde539ec81eb7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZES62385997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5411ecf440ea095f70cde04466a72a0937904ab4862072cfc8b18ade0f5da5ab. 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/QZHN52471319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e540c1655f3a3383ef2e5e3f34c0e3fe92b16868be0b17cdebd335e9b86ab0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEN2353349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95fd24b846b908a7e947dd367f051569ada052d29d63a16c404e92536d2dc9b. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/AUMEV2566466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd9936a38f6d01487280a950f6e804cb24cf55411053c7e9c6a98baf3e355bc. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/AUMEV2566467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc3a7579a0d6f44f59d3126f20de9517096d6798ca19cd143b3744e80406465. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/AUMEV2566475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f485e1123a07a30a03182d1336abbaf8d031d740ce8527018b037921271b70. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUMEV2566477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b55cb95669972e6868f8aaf04e2d4b047d64467b94da1c295fc774d6d1f7e8. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:06:19Z), 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/QZK6P2325975.