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 0x815c1a43e2b653529f99e80dcb9db04ac32de5650e294785df0ee525cf358536. 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/e3ac014d-4ad0-41ef-878e-f7975993bef1.json and https://artists.proofprofile.net/proofs/artist/e3ac014d-4ad0-41ef-878e-f7975993bef1.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 0x85ee0c104d2eb62e9fc8d00103b71cf30fbde0fcbbcf3750c1080116e2053b44. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/KRMIM2000905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b338cbc00f63a428059260d0b4946a08c3fffd8b3e104627b5d130c59353faf. 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/KRMIM2000907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804e04c1bc0ead95ff582b6909647cc5ad98ccc632f0735995ca05200fe7f6cf. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/KRMIM2019563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825a960c92ea95a44a95472cd90dfc832b6e464156dac02d801daae7cc91f29f. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:45:33Z), 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/KRMIM2124925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd523f076f68d7e41e45a2c117fbf501461ee337453093d3939565949971f1dab. 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/KRMIM2124926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb49ce7ab667e7b209b3cdc3e078480359e22039421157e7f45358c2a90b723. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/KRMIM2204468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e105b12a1ea8375aca5cd2ac67982b63f3c441daa90fcb0a3b1d319e4530779. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/KRMIM2372102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc640e4e40a6a4f39d62f0e734ac6fef76c7275b638021c065d0da6397896f0. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/KRNAR2339643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cad8bc7cb635305a353843492fec3c50364e4044053280907aec5d493fc09a. 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/KRNAR2339640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb468bbb2d8c6233bf7bf359a769a4ef6e4a189f245eae761abb432da4c2e1475. 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/KRNAR2332347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23129bed0f268ad7de85b9b0bca48de4d90d19b5533f5c871257b32f20e8c21. 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/KRNAR2339641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb83149b1dabeb43d7ca2aeb1dbf009e6eb6c0efaef9969b81e1bb81301e8e7. 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/KRNAR2339642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc640e4e40a6a4f39d62f0e734ac6fef76c7275b638021c065d0da6397896f0. 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/KRNAR2339643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff345e894647a8f3d6cd926831d2f5d3e9fae8b62776997bbfdd849f3435ff4. 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/KRNAR2339644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120c5244b5c0d27d8c54d263b174b86ea8db5f7d02e9c61fcda75aa6c6d5a5b5. 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/KRNAR2339645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6471dbe322c68c59f126d1f1c47620e478bacea05313079569fe634448142e. 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/KRNAR2339646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6884cad0bf44d3964bde05258c76973823e289310467dca4ab06a7a5070fc7cc. 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/KRNAR2339647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9172481dfb0e6056d37bca64e275adb14421cd92cb67441898f987eab9c84ef. 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/KRNAR2339648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3367d69f12710c3bc26a7c7f18d930036d2548a116b6a32d818e6ffbdffbfc89. 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/KRNAR2339649.