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 0xbe1297e5e479e5039cfd3da37071abd888d5d6415d0b5259a97c54bf49b6ba5b. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70be3ae4-3870-437b-8383-544db9b35f2a.json and https://artists.proofprofile.net/proofs/artist/70be3ae4-3870-437b-8383-544db9b35f2a.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 0xe1ac01d39f20fc7dc12b3ee673d867d413f2cec0d79d9c3aab4abe56abfbb63d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMEP2275744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d3754fb97ea4906649f2cf3b9f95fbd245ba0192109c98c7ce158a7dad1018. 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/QZTB32235955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247564818e618984258d2668d8a48eaddbd28416e06b46a4f9fdf3198a6c612e. 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/QZFZ62335146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda55be328535c0e3312b5339e87b77882dd2c54f7d3d410daf222b95726bfeb0. 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/QZK6Q2369871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876523dc03b9fdc8c11b67b2dfa3d5b8c1f8e15887bb4e5c7405f94d685efd1c. 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/QZK6Q2369872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd835171b2b18937242dbe9e989da9087e2a14218b6697dea6d4600badaf14e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:44:13Z), 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/QZK6Q2369873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16867fe65c18abe08e6f98df4509af056e6a8b8548e72765eddc003de3d80950. 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/UY09A2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b600b707bf2c8d47dac4eb2fde0c61050ce2c3145ca8874d694005c86156a9b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/UY09A2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fafbb5d3063063571b08d5a9a6be14e4a53c787cb25dced288fe263ab27d53. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/UY09A2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77747548a248b3f1bb91325485f13a34ce4b8f1c962a04e0f9ef9b1f7f521178. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:46:47Z), 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/UY09A2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d9d240441b4aafc7db688ba867caf109f4585eb5530200196fc6be1ac7131b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UY09A2400006.