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 0x835507d0dd0edc892bf7775595df3ebfb53debcff5cb72267cdb234b6739a371. 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/f139f0c2-9878-43df-94a5-aee9808c4845.json and https://artists.proofprofile.net/proofs/artist/f139f0c2-9878-43df-94a5-aee9808c4845.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 0x502df99f55d811c62c27dcb87f785e040cf67375f655d843c711efaee5433dd8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/IL5842132464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ee80517232e98e32bfb772778304062b2867c60c5509ddfdff85e8aa541ecb. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/IL5842132466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cdbb6ec624d31248a632bd5a23240c901629a9f2297e4e6dee5b1c08842c5e. 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/IL5842133374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029cb4ddbca5a9e522a8d7a8527882156ba93eaacef61196b305012f07012aed. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:37:19Z), 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/IL5842134189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c545df7de5a4dba8cdb5975758df4fd4cca86bf9be9b67c4b4486a1cf80cb78. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IL5842235578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6f8db2e09dd728eb606cc227bbc852575a3349de3fa6b35205c124341008e8. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/IL5842342563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c4e314ed7ee1938d451b7f408aa97d654e0850166cd7db6a46958fa24151dc. 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/IL5842343237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4baa90254641e344e0b1ab4f95e8b570aa8bef7ada8dec2f108fc174e56cf2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/IL5842444159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d118806e32116458993571e5e3f0bb69e0d0db2d8408791de350042278bfc6. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/IL5842444431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d117c71951dfa78d850a25a54b04cb48404def60e76de46a6f237907326155. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/IL5842445373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61cb42623c78951973b7fe033e49ff22980e5fbedaed52379552ebe70c3570f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/IL5842445624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5b45b2dc252743e013002908ccbc5362f747e549a5965ed4c086d00d910a83. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:17Z), 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/IL5842445838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2c573b910f6455492d3cbf9054b9e8960b2f191d07d12c4cd3c1a230571aca. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/IL5842447138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933385d95c93bede89ece5c59b8181391c846d73b8f990a443ee8c2fe216ab99. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/IL5842448600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bed661b6a9a47f10c56fbc16536f2ed0f243c95fe57eb6bd18600c7155d7d4. 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/IL5842552545.