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 0xe86058ba1779d5bf67231ba363134b48eaf4b43a56fde6541492c59fd4a4ffe6. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c7dc8ca-b03f-4d9e-bce7-6ef72f3ee069.json and https://artists.proofprofile.net/proofs/artist/0c7dc8ca-b03f-4d9e-bce7-6ef72f3ee069.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 0x01a1e924159602d1cdc2149881510f73240eaf6fc7e78b9b954e1342e75084b7. 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/GB96Z1100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c44546614ff4b7fda505d701d559c076aaba7bc19fd5d0fec24c4ae88e7756. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:52Z), 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/GB96Z1100142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a54efdab632e398df6dfb18d4d2deeb1781a7873172e9dd92b5e80991cf55ee. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GB96Z1100143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2caa894684331ca1c6f1bd20d8818312b9a646a9a86ad8324cd1b9691bbbb5. 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/GB96Z1100144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecc78328099361f8bb408adab753dd888e78a174c04f3444f53cb9671b278a1. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GB96Z1100145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec9bb55afd56f5e752b6533305bd3edf3440918ce1b4ccef162f0a239fc5bf8. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GB96Z1100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29946a346e3ec13b425751dcbc8bbb61a77e7eaffc19bd0afffdde45c1778498. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GX8KD2422595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd162e5a5c362f165c0677bec25d65d0d7c4cae5fcdff811d8871823784f23bbc. 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/GX8KD2431749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820f17ed588e42cb3d444742b5ddbfdcd3bc86332eab5aadf58c1d16930a4da0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:20:36Z), 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/GX8KD2419155.