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 0x664014dd4b7ba98a803e9ba18a509c7a2529320f803205d008478ffe9a573c5e. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/624ff631-be63-465d-801d-1fac0c0aaef8.json and https://artists.proofprofile.net/proofs/artist/624ff631-be63-465d-801d-1fac0c0aaef8.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 0x18650d9564cbb6fe2564fb1d81be6af3d20267953bbca1156e08f31bbf5b9f51. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZWFP2493531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c4112f1724bba6ff1bc254fe91b34110cf693d9925380d670c5895ff7c1085. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFQ2470032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebbc94d33de8b08465915f662020df4be1e20cc76290981c5567fa20806dc77. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFQ2471867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642ab0abc917c22e3141c229a7473d36c8158a09c84e94b6f0985d3aa7d18203. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:06:38Z), 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/QZWFQ2471933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff7cf4aae3cdaf3a8f8f3df4a9789e3ca444fd9b666966afa8be772fd86f30d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:10:54Z), 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/QZWFS2416433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c0697234efe0602b6371ba91f6ca512c01f31b22c4035e1166afdda151dd5a. 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/QZWFT2483960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445ba061c1d01a9dfb4e8b45747031bd24b5f2918a7944a8374db19c929b3f6c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:03:56Z), 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/QZWFT2486163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4243b02d5ef5a4ccbb1b0591bf3d8dc7412c1bc461b0e5001e71e0b7ff19b900. 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/QZWFT2486162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d7e4e16d934904b6f7f95a92b16b9e166619d3041a829a0895719469143fa8. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:03:00Z), 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/QZWFU2420938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85074dcd338db6eeebe72e2fcde6a9d8a09dd8d86794d813d952cc6a8112fecd. 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/QZWFU2420910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae32a045e9a999f738302cbf596de57df8a62f5f19a96a5041b89500c9bdb274. 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/QZWFU2420941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67fefafbb56403fe07276dfcfa31ac1553a7722341056b47b65cc8b69f95c8a. 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/QZWFU2417572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d30d209cab5b8bc597092e1836b8d709f965e7593d8bd821402a034781ba4d. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:48:52Z), 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/QZWFU2420925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c12fbc7a934a3f701a67fdfc4823a3af20be171ba33936d0fe6a7d57b3a2990. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZWFU2420922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d0d730d6a7030970ef976c6bcad618b1d6d8d0d295ae915ec02b1c5c18fb4f. 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/QZWFU2420932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9fa951ff0fa97996a769037db0b3b2dc582a87b751c71738970add6fea6647. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:25:51Z), 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/QZDA72558575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73732f4b03fc0d7dcaba7ad22b335408a5bb0080ab24c33490173ad53f5484ea. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA72560075.