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 0x7c92b0c375ddecec15ad85af43046861a8d909bf605f6291c1f88ef8435e6228. 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/e2a07d77-1e93-4514-9574-21c78aac2d79.json and https://artists.proofprofile.net/proofs/artist/e2a07d77-1e93-4514-9574-21c78aac2d79.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 0xfd9b8b5ada56bb2c4b7c4f8d7ca996f0ab6703833cafcd2aad85691dd10fce7d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZGLS2278421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e400aac3822b12a6c2627ebd08f84ffcee6f412abab01cc00be699bf8b38bf8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:31:56Z), 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/BC6A02300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa027c1a396c051b68a1a93564d85a373e512c0f6ffbfee7876b5834b7a1e82b1. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:53:38Z), 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/BC6A02300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5111263ec7243e6b2bf0beffe5810be091c31495fcb34703ae5d08c608b150c4. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:08:14Z), 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/BC6A02300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809c91845a537a7255346aac4b7b04e366d1ff47ca652699a5f2a4cedb2fdf52. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:48Z), 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/BC6A02300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9ae863810cb75c6684feecbb6879587da4ee70fd7602dabbb440ca6d6061f2. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/BC6A02300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bee58f294266ba53e4fa71d29c3da5ce2c3709543e4cfb081ae08717f631429. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BC6A02300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13e227a9cec9e2498ca302dda23efa1f07442118a54761d13fcd0f22d315c19. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BC6A02300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde859d97d6c1493ef7774d96d155e47313a6752c8f655f3468033afc8218667. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/BC6A02400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d8a104755ffde76aace44ab13879eece12a9239a5bc0966cd9228b638be009. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BC6A02400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81630efaa9e5efe5f88acd876c3761ddb689951368ab3f528738f51e11e4e6e9. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZW9M2415646.