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 0x0180ca6e9b22ff74b3e91ed3c747eaf31fd416967f36ed07c4419b6ae78f3995. 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/6fd3aa29-91f8-4bba-854a-18f7c27f6ba0.json and https://artists.proofprofile.net/proofs/artist/6fd3aa29-91f8-4bba-854a-18f7c27f6ba0.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 0x8336cd858886e002122c3aa476ee90533e33986ab481bf8cc1e886e626344765. 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/QZBW42304002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8336cd858886e002122c3aa476ee90533e33986ab481bf8cc1e886e626344765. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZBW42304002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f6bea479b47a8ccda84da7704fb974a4fd533206c0e46e7d8af9a2f36bddb2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZBW42304001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3799f669ed7b348a402ff24a35803e44b0d04e7dad3c48a51ebc30f4495dd21. 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/QZBW42304003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64755f8f9cc1ed82eb41c9c40a3b41440f083c1cdb41e60d19668bcd873e9a4. 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/QZBW42304004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953c8befaf54e0b7a10d4231e60ac429638fa6c4e5324d34618a83c013be5de8. 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/QZBW42304005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65956a91b33181a8606caa299f8451444c846d68c67eabbef0d85ae611d97cec. 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/QZDA52340034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf388ff8cb210cdff390fdaac09c6f72567524813bf45b3b1f609033d1bf36138. 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/QZBW42304006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8aecc53c543382def3a2c7c2400d59518b4d4c40658373f218a94f7fff366c. 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/QZBW42304007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb94f86e5a6c11cdfe09501c66ba6e26ec9ee580b63a55f40f7d9d864a60a7b7. 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/QZBW42304008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d2f21c154a14d40071c82ca5bd87f6b9e68b94cb3edd4f163ada3129d15cf1. 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/QZBW42304009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26fd1ead7c393f816ab1f964b97894d2d3b294af163a219fac495e22fa715e8. 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/QZBW42304010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0b70e118666855a2690063412ade4123fab610e6aa339295790870a16aea02. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:54:59Z), 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/QZ8SH2507401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9c118bc058349d23a3d5dbcf1f89d9e958514624729d3eee3d91a3f1c87966. 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/USMH92384830.