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 0x52947d9e02a7c603e835e458541341e78d008f963e729330eda5440dcf9f8eba. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddbafddf-0c4e-47ff-8b6d-78495f8813a3.json and https://artists.proofprofile.net/proofs/artist/ddbafddf-0c4e-47ff-8b6d-78495f8813a3.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 0x6075cb20a07dfd1a7c35fa421b9d05b44df77095f6b1e7c6adec9d1da6b9c162. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/NOLBN1902002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d982d712ce3d20a411bcbf98b96f2225942bbdf2ef129bcd7b7cb8200bdda90. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/NOLYS2506040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2b14d7b06a35855548936e7f7075e01955b1333ee7a3770967c9aaac53dcbb. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:29:40Z), 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/NOLYS2506010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62730269b0ce6575e6f15cf794948af81fe464ebfd00ec6e432d877065e00e7. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/NOLYS2506020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacf60ae05b7b225676f720608bf75bde6e1680c4dc455a4e537dda9fc0abfcc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:51:52Z), 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/NOLYS2506050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef41b177193acc7accfc8bec17de806397f5cd59a88313b97abc2f2d3f2265c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:40:22Z), 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/NOLYS2506060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2931ac970980205a3d794d1d45d00238734847def5d13820145dcd3e0412b78d. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/NOLYS2506070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1210a543de684ac8f7be497599156ad0079ccbebd096d63cb536fa2cd1388631. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NOLYS2506080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9051ad21e76d0c2e286d360650df5139c71998c0d0359879e0b65b5d4c5dbf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NOLYS2506090.