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 0xc0a668438e45f40db68bf250b6e783f19ff50910f751035abd94dc6f41b62a20. 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/eb397222-3757-4439-ae78-8ebb7cf80bda.json and https://artists.proofprofile.net/proofs/artist/eb397222-3757-4439-ae78-8ebb7cf80bda.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 0x176384faca132771f6ea3767cfbee3ceb6ff96f7ddf31c470a2eabfff5fe61e0. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZHN41999365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fb3d3bf7702bff09b9d545572855404fb98f057536c8eba5757a71eaa085d4. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZHN41999368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2138f2727763dabf9427c31f843e4fc0642a76fb7bc5b669bf8576d36714d39. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ62065673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa106121be678b95625da5f17463c985bd1646a9b249836130e76987cf6d37f97. 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/QZDA72092243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26502f2a1cc2ea64c9f203df70c4ba658f16fd060793957269d4527202e3d26f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:35:05Z), 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/QZDA72092244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148e2d8a60fbe5d3058301213d777d5b12758bf759743d9a51a87678952e98a5. 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/QZDA72092245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4865938b59f56b05142863396478522feb4f8b80a96a2c8f3ee1d9932413f408. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZDA72092246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1435ff55ed2e925374821749aec5512f34a8c78875034aa12aa13f9e01aae86d. 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/QZDA72092247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9b58c67324c918f803ca1d758e453c471a003abe344f79623d7df39fe2aa22. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:29:10Z), 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/ATAJ12100548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3874ddfe25854f85f64e7728fde66c8a9b9fdcc1f3fdbf0deb5b62a6edd7e167. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ATAJ12200735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd4d22176bfdc120685fbb8be4dabdd9b10796b5568fbbc5e4ac4170e5fb923. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/ATAJ12300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa246d41df5fbf16b93664603f5adef0667930d9dc46acdf404572af3540e64e2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ATAJ12300500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab65c06b3052f9dbb19ee3a24c7b329ac12b6937a5af9f6538cf9a3c85d2a376. 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/ATAJ12300836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b20bb9fb8959221dfc8cf1e66af62c6cd4ebf4b1d972c9ad00b87998d395311. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:35:37Z), 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/ATAJ12301890.