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 0x5827ea76698df86633471934aa66659f542616570ed6b021835cc1d638bfbcf3. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f60ef2f-d863-401f-b822-dd5c95751848.json and https://artists.proofprofile.net/proofs/artist/9f60ef2f-d863-401f-b822-dd5c95751848.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 0x0f796be81cc55e002f6358c42f981f31d670fa214c44c9e3d256dcb8cda3b98f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USX9P1363456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30196ad69dd98482b5edfd8f759e8d38376215a08e3911cfd5c58414eb770d26. 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/USX9P1363457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a931ec4f9ae502d451f860ac0b9ae5914a910593053ed102530ce207f48ab01. 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/USX9P1363458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3507376cd6ccfaad9c20636492eb7fca68591e60555f5b6866c5d3085d86104d. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/USX9P1363459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1fca62ffbefc205f0888bf1d24e3c78a3fd9c2e7365032a9e6a06c78169497. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/USX9P1363460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0151ed186459715a7807cda4665af97a8d6ffa6c7339c9a8c93a825436ad2504. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USX9P1363461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586cce5d2de6e52fe6462dc726cc5593928404a23351532ab5d82907c8702e0a. 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/USX9P1363462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf62073e8014423ce92ce4f0666af008214e8a622a436a09c6419480480c3ef4. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USX9P1363463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdcd9dd3b5f91ebab2d805b1a591d6bb8008c4a0b8760d24bef9e643fcc9c68. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USX9P1363464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9f19812692438562e8c3122dadbfc5703dc2c6816c7df0ddadc28240ec9201. 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/USX9P1363465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd622023bd6f87c20142e8dcb9e7be4426ff1c90bf920142cd72c5f30da497ffe. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USX9P1363466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0fb939eac4e4c2d5eaeffe1ba38febfedc61bd35606eeec8a999642a60860c. 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/USX9P1363467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c5498bcdf7a6bb0ce05ffe00f85c63bdd8d5ef6bec635b5881741195a797cb. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USX9P1363468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ca9bb1c60ad638410bcb36e6353b83d8760cf516133dca9316da9ed6ec9ddc. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USX9P1363469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0276c440d898624b19b1ac4b8f455b369624de73e8930e6473a5990ad13858d. 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/USX9P1363470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f2a8cb419eb11faa52c43eb05ef3aaba172c4a4c5dbd0bca94d11c3a80bc3e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USX9P1363471.