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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6ae326a1ced8583164a640beba7f2c53afcbd39837a9f37ce130f464092b2b. 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/b9595a43-5b12-4dd1-98b4-197be0784d30.json and https://artists.proofprofile.net/proofs/artist/b9595a43-5b12-4dd1-98b4-197be0784d30.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffab36dae671920dddad63ffa33e61fef56fd5d24dff89f4f4bfa2ac9b50063. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USA2P2231844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f639dd2ecfb73afe02d24c457a5260bccfe2605c27e9f9cc3f28f6985dcc395. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USA2P2249073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcae0a5cd2b0a833f9790a2c97a0aa88be21c93adca17baca5c5564f4956169. 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/USA2P2305972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae903f7a8ae3bd85e9f48bf9df3958f0a5d94860926a82d7b23d110f42e4a2a. 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/USA2P2314815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f34bc4375a1613c42f99ca81a2cf40bbff9d6c390a4a944c2d63490c83f28f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/USA2P2343322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1cee92d55f48280312ba0e53d054a22b6e3adf482bc158880ba63bc7b4d741. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/USA2P2343318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8a5405d0c93af27668164631be4568fa3d2fecbecb81ee174b1076098da49a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USA2P2335519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34fc1454d49353983c22b65c9303b387675210b55a5c51a0b4adb56e53af4ef. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USA2P2343324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcae0a5cd2b0a833f9790a2c97a0aa88be21c93adca17baca5c5564f4956169. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2305972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba316b1041136915f868ec082a51dd50693d3611bf012a0ee07c2bc276896ba. 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/USA2P2464135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbe71ede1740496ce72556efaf97c8f0ccf71f3adeca73299bc140e37c372bc. 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/USA2P2430791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaae5263d30e83191ae140f2bd477ca2161bcadf696a922e91cd56b84b4be644. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USA2P2441792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba316b1041136915f868ec082a51dd50693d3611bf012a0ee07c2bc276896ba. 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/USA2P2464135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bce5a3ca2c79ec9ad7b72bd81995f440f13234cb466faacfd4a2e6cdd7ddeb9. 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/USA2P2464998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea42f3b8dfdedaa600471f3942b05d07833eab027fad7cbe074129337f446e8e. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAJW2568012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecee6958ab8c326df13e58e4253d28b79c401cc6ed5a7866a9f8d81a734b783. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR2X42151434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1d6f43cff7d3f1263de6e3c39a97f753ae419ea8530d7ffb6386f6fcd74b2b. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZES82317532.