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 0x7030e4b3bb134369f0e1eba72cd54eb5b49dbbf52d6ca44562606dd6f19e4294. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3422c93-7bb2-4602-9f58-5aa7f13f228f.json and https://artists.proofprofile.net/proofs/artist/e3422c93-7bb2-4602-9f58-5aa7f13f228f.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 0x3b539a9f4e068ead26055e14ac9fd6aa75e834f7f50a3d3364f780e485097263. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:35Z), 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/QZDA52080928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb960cef6d495077d364b80c1b7dca6641a2ce532e69d6f3fc6223b148348528d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:50:22Z), 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/QZNWR2162559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb960cef6d495077d364b80c1b7dca6641a2ce532e69d6f3fc6223b148348528d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWR2162559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0a506ba8e43cc817afc0f024f6c381d6e7592f71254fd3566d66e8bfcd3f8f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZES72141046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2b9f54d543caede1a200e77f877c4543ad8b744bdb49adb079f7c28bad266b. 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/QZTBD2319957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d3f9dcb9ae1991c6e1c5963586a8051982f84b738146524c132d5c232ca5d7. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZTB32395258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1e6497018b66d92901a1c5ee935b2d954134a39ae185b94ac79f9288d5bdf3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6F2451437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd4b1130bec5ba6fe8ed87b6d9d03ecaef5a251a88459d1692d2cc638e21e61. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFS2304759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bebb32f6d585b0b5c22e27eb4c401245fee0acb6b774465a3d3d61bb8b2d4cb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6J2457550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03421db858a125357b6a2bdaa3999b5a03a5d6961620cd4d43453ee13f12751. 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/QZES62400752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2b9f54d543caede1a200e77f877c4543ad8b744bdb49adb079f7c28bad266b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBD2319957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5651e4f91e6d853edfcb34a4048b79a482f8292a67eb004675469b5166895dbc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES72353576.