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 0x10a2a73fa507bc2a80779f582009db17467cbe8dc74407f7ac1edf8579431052. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4f044ac-b680-4fb4-9f60-6bd3d59006cb.json and https://artists.proofprofile.net/proofs/artist/b4f044ac-b680-4fb4-9f60-6bd3d59006cb.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 0x41efbb480c3707c313c2cc8d4f7b380453e836dcae9be00137676f2408f0d763. 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/QZK6H2108677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14672a931fd00490cb921001976e07e14e604edcb9bd1f1758fb824b48a98924. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN32145140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b40735252c10e5f29687550ab442473bb3795c2bcd8dc9725ae7c9c1281fba. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:30:22Z), 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/QZK6H2108679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9c89e4cfbc30b19d955afc23a8af14b4f803dd03f418f860f04910ee95b112. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6H2108681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e761e993724d1432488e53ed0a710fe44a123b1fd907ba9e706cb592058b9a2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWS2330069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1a8deb1b796acc1fb8fb937c854a3238f2ad918c2b3f23c96688fa3c4c990e. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZNWS2330070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d800c744e00fa0799ae467e249117852b30d85c88cc9f9405aaba703b6af70. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWS2330071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e44f47df607ae4170483b8e3c95f7cb4adfcd10ef5750cec5fcc99dd7660c51. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZNWS2330073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28071967e7f5f89853baf68f8e793eb5951ff8932694dc1194a11d668bb2fa0a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWS2330074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece4ca8dae218b87be6ccba872d523efb8339f0b965cbd825f8389d451d3f46f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWS2330075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dba16e5f90aa9321cbc4e983f86ae83eeccd62fb8275d02b288d145c035c8e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWS2330076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a7d052911be2482b4d6e83338bd900d8552b3d7bd0bf97a4fd9f16b47a47b2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWS2330077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2349422d86b01a6aeda9062da875ecec05472f2c1f50a7161d744e5cee86900d. 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/QZTBA2341118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ff8e448511a9a53c00fccb224b4519bb51cf4dcc9234b147afad71157b6069. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:36:32Z), 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/QZTBA2321237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a758c8fe5516f9e3c53c7a4df8ce78084138d60c093521af0c4ff9c46b2001. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:55:48Z), 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/QZWFS2499636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0493635b72eb1ca342fab27415b742642cd92c10f04e10d65371683b6d3fbe1. 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/QZWFS2499640.