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 0x8855e1687a7144c9a0792e27edf431dbdc8d715229f0c2ecb607a7860aa1e17a. 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/36da4dbf-9894-4247-912e-e0273cfdab98.json and https://artists.proofprofile.net/proofs/artist/36da4dbf-9894-4247-912e-e0273cfdab98.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 0x7ed33795ec26b6b19c76ea7f59b46331a11f4b67909761bfb8ec0adbf449471f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2147221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b0417258b6d805559a4a67cccf6e05dea2068ee6e2966a060feaeedafb587f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2147222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a7f3fcb267953f547109ed1055cfcfa01fec7143fc952f7fed56e31c7791a2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2147224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78520b4d14d8dc5a578f97053a4cb332b343dbd04d0e111a9c95f52a0d519c4d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2147220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401d2b37878cc91abef864ed3566272894fe854f84383cab48eb458d2871ddab. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKPL2147218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeed1c1153e3a5b387154b75300b91e3ddc21da32edb69b56320a5f23a3ea404. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL2147219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04059a3cec50b962be3b50166a3a00011a60b051ea3fe21ccf6ceea0afe09940. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2400646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185ecb45f5c66ec0f663818fd7b326a882fc5c4b04c7ba137552f0d38193b6f3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2410008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b7b495ab0ef6f92ca05140cf884379ea6aa0c253c7eb0020039bafa80e4dd2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2410009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140aa48ee989956a0d5e047cca6f04c1d120a8c52635f77457976c2fca03dd84. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USA2P2410010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9889085dff99bd4ed7ae8104f6d13a6457869200d9e2d7ba5212c85c0d2dda69. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2338260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03106343de822881181379bb6201dd44418c671ac816e56c7aa57222aec8fff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2320480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32202717bab122f5f4e8b1c0746bc0643ea1146318874cb7e249be9ba6538e9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2251058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903b98560225869663ff09b6875a177d1668cb75f76d0e4d79d333e607407dd7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2240778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda00d1df6c3f2713df4898c31e7059fe9a506bcfd2b0161e2047d9dcb3961b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2227275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a38882b8e281fa5544c31860ab496bab353b4d3d41a3ebe414de8fd932194c7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2227262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef0a3ab42c023a54413966259eadf38b1e8c3c80db4bb28d9f76aa36836c0ba. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2205188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77efe6750362194017993dbbd692a0bcbbb8a2ab87165519e94c9326b97f054. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2205186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc657826babf9f8a8d3feac54c5491d76ab5ed1877b31fae87d08530e5dda20d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2200854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cd0503704161978b0e444ef0f7dadf66619c41dc6dbb04d4f3431f3f095c34. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2117607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0b184d71630a289ff22aa8f6311d016c82c3df35932c9af18c1ba5320234a0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2117605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9a9d738871c0f488065ba587ac53195fdefbf4570acfb1d16a5b7b9e2d2229. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKPL1810503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d697dc71ab6e7e84b6fa0ce2aa1591c4f9a0e25aa3e95eac0bb513f93b5716. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL1810504.