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 0x429ae49429603f0baf02e6b49e1dfaba5a290027cd9c872d58bbaafb942593a4. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a0dea0a-3003-4ed8-8d5b-0d933cb63218.json and https://artists.proofprofile.net/proofs/artist/9a0dea0a-3003-4ed8-8d5b-0d933cb63218.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 0xd4f1782b5c6e3b027db203c78790e02849557ab208f5bcada57b3d7492288869. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZK6K2599566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57320530d1368b271475e63d204cb4a2a0ea319e8428eb0080a2257a3406b820. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6K2599567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5af4674fa5dd2e88d5fde80e5d8d645e9eb9fb4842a2b49137aaf4e2ae7be4. 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/QZK6K2599568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028c4aabbbef896d5428bede75d1cdd4cad408314ceb48fd78e38756a9545f66. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6K2599569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104b84340fecbf977e7d7a0a36c3b53d1eab03dbea53cfeb91e19f19e434b24b. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:40:37Z), 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/QZK6K2599570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29ce926db93964b8ce043a47e317d0c1930d9191dfae0e2924fa52c072fd2ec. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZK6K2599571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0312bb44a0b32eb9bb883a41e9d33164e248a21b5294f1b80772c87a921dba7b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:13:32Z), 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/QZK6K2599572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358440e732581a08951cd5adf95251b0c979a79d480c746ddd13f7369df38948. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZMEM2546094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc1f428a476849b15bdbc8af18230b277a2c9c0b5880acb25acf3b4da769629. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:00:39Z), 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/QZMEM2546095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff43b368d433f055bebdf4cd8d104594d6d3f9464616b9640fe15ef2e2e3902c. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZMEM2546096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d71c3023ec14f425015ba1ebde341570c8c6681367a6bc70c344249f9933dd4. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMEM2546097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5136c015cb53c2fe10cff055dcba76ad2840e5a43d6abf5576f264dccc6a46. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:00:43Z), 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/QZMEM2546098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06097bc01714ca2b4ef64c53f5ddab00a918c39365070556715228593f34ce0. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWT2545009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4256ff8e1a06c70eaf8fcaeea8d7db68fe8b441c2b91b2ac64e263dd3f380fc6. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZNWT2545010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c6a06b6de4a35f5d8a205647014109c3c0cd75c60c73b04aeb1a4d38782792. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWT2545011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e16a68f4a451aa34c23a6095ec47a70be3565f10462bcbc5d1d50402967979e. 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/QZNWT2545012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31350221fe3757624f963455e5f54870c6a36aac6ec64a870a6a04f7d23ab3d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNWT2545014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1799493989a4e5be9c7b20b6731546ec23cc687d384ac02823087b6643e0ac80. 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/QZNWT2545013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d31d057fadfbf79f57504a6c2b32b8698ee6aa65ac8f286f286cc11cbb335e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWT2545015.