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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a14712a814159f5c459519899f810c729750d151834ef45a0cf764d059de3d. 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/92c6a444-0b7b-46e1-808c-7342206610ee.json and https://artists.proofprofile.net/proofs/artist/92c6a444-0b7b-46e1-808c-7342206610ee.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a717fb7fb41df1e5f50e3629691fcb9d743c49d2a5ffa16095e0e4c83e8ce1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEZC62050183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b80999d397c2035771f8b385b1923f680c21d18021c33ff0a16b8e195f25b18. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA082496432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c02cd0c0bec29cfe529b8f00d910db54a026514eca66bf6753858ec1cb23a3f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA082496433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62623b714fbef72a8ee1be89587850c543e2351122a77131fa64f6c8e4ba6675. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA082496434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166c325d9e10a0f1584d8224da6993e460624131a9d1284091d79ade01172305. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR96X2444988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94d54583b4f52e4349697f4693a9008a03473ef423c1a5f89848a4db60e7175. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA082496435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277b01617ff24039e315a2c538b84b47cad6abe0d4289e0c4dcf090669f65083. 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/DGA082496436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ab718e38eb8dc15a52979ce612a0bb38f42cf5abe427f2d4af75d6eff65f70. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA082496437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4225780c7054505edd0ec932900daa354c0fb9137abda7433c1502c7efa88179. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA082496438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d45f1f135f39f6282cde20866f8cb126f80b9bcf9d1f825f8a7e84c6119c00. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA082496439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877e50057b0c5fd64ec7b353893dddf7576f2676178c977013b61a886adc8b3b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA082496440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bb66a2440960a29d80a9d8ba1acb7591afc8d82f1470095cf4205fe32886a0. 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/DGA082496441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7202b0b168bef7ba14b85ccf326fb5d85040c46807b1cebc6725c0ab914d40. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEQ121431597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c391c98a99f13f2f62787b6f88b8ce40008ca44d2325393968ccf0eed56b98. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA0Q2493043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94d54583b4f52e4349697f4693a9008a03473ef423c1a5f89848a4db60e7175. 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/DGA082496435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d45f1f135f39f6282cde20866f8cb126f80b9bcf9d1f825f8a7e84c6119c00. 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/DGA082496439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b80999d397c2035771f8b385b1923f680c21d18021c33ff0a16b8e195f25b18. 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/DGA082496432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166c325d9e10a0f1584d8224da6993e460624131a9d1284091d79ade01172305. 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/FR96X2444988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d45f1f135f39f6282cde20866f8cb126f80b9bcf9d1f825f8a7e84c6119c00. 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/DGA082496439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b80999d397c2035771f8b385b1923f680c21d18021c33ff0a16b8e195f25b18. 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/DGA082496432.