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 0x8c188d5bcd3271e809e0f4990bd8f7bd0862e4b4d20f7163a377000c789c85e1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77e11787-eae6-4309-9691-1a5b2a44232b.json and https://artists.proofprofile.net/proofs/artist/77e11787-eae6-4309-9691-1a5b2a44232b.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 0x04cb052b5b6e8a6f0ed187a4f2ee4d3e8bfe244c82fbfc230559f56d48a1f626. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZ22B1803608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c2a1d97bef98b20419e6c6b5daf9081fc0f3f725a192b0d055517084b7529c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZ22B1803610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8083b43285703bd4219e375a8a359a93c367be3f165a8f02f9c6076dfdb10985. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZ22B1803611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62601039205bf20c3996fff2806c35b4c182b76afeb6ed5fca530daf8db2195f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ22B1803612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f372594c041895da16ab54e50566b6c7b03e1e2ae587476b4e013135edadbb. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZ22B1803614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cdb7f277db1ba8512d9201339f21cfcc8d62e7239389aee21835da5397a78d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ62365117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6790a5bb3456b673f69d4efd6bac1c8aa9abd3e4fe44f41cf87f9c13a4f8e2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWW2052646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cadbea1c7c0d54ea7221022d5f715dd0527d181ef1eef6fb0befba97a94eca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWW2052648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8b352c41c659673d3d2556c636e914cd638539307f4b6c842373175a432467. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZWFK2568752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7febeefcd352b5857002a27d821b89c67689ccccc73c2fdcdfc0a4a911066c86. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWDW2584213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b2f34ea61d552869060f3a1763b33f8654f10a417516444611dfae3b5bd9fe. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:02:58Z), 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/QZYFZ2515685.