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 0xb9c6961f9499500fe722efd440ae0ae5ad0a1d075ee2005051a41d681c95ff99. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7280915f-c6b5-4700-8dca-1c510618d0e0.json and https://artists.proofprofile.net/proofs/artist/7280915f-c6b5-4700-8dca-1c510618d0e0.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 0x06b781fa9b86a6cc5801fc653a2b0ca7b984acbf60b3cdb26d1b1a51f7a4c43f. 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/TCAEX2029122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0784e6fb9ef6aea6fde424b9ee3e3259c29c833117c3e98e1d695b8a63efce. 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/TCAEX2029124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a011d8df418346367dcfa168fc2237e847eff4dbbb55e18112994352654188. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAEX2029127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d2ebde01836adfe8c7818582412d0fc83a6db67a1b3f9be38d604133c4b2fa. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/TCAEX2029131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd7d3d859dae1073040f4ec0fe298a59e0000e57f1e439aeb9e900127fc6b30. 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/TCAEX2029134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4076ebabf8b49083c390a5a5de3e397a090425b6dba3a1c3232ec35993d604. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAEX2029136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83162adca0f9d86cc5a0c927314e88801b56d3f9540b7dc5ea2e501dd7f758bf. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:27:31Z), 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/TCAEX2029141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0017ad18aa465b851cd8c3b1cf698543142799635132885a9505afaba9b169d6. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:51:45Z), 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/TCAEX2029143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcd005979626572ba4eeda4461ae4a4195678f147a3f5eb617e52d8d1838f6e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAEX2029147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77198e5637b1b3c9c9758c41c5dbeb659cc121c2e4793c82c2c445290a4e7d2e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAEX2029667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d58d41b86fef6a9b98d455f033ba8def6a15faf5cc87a0e643394dbb197ab70. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAEX2029668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44dc106f20bec1d2b3fe0810ba7fcdee337da985ccb96e884fdb73f8e19b10d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAGT2396831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282b2e7c1ad5123bd9167a3b1b462c5dc5fa723856665635e1e33646d5ed3687. 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/TCAGT2396835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4218b4c22b8a2ef91d378ff120372184d571052dfe9729cde2e8e83eceae4d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAGT2396862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e17f8bc9e8d93b34310d8e48b5925e38fd5c60a8a5a8ede9abccb513443449. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/TCAGT2396871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08752441c6ac11fa0b5ead606e9259761c787ee81f76081c90ad17ee86bcd69. 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/TCAGT2396878.