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 0x07b4b513e785248278a4645292a197168a15d9cc51db3ee047b91f6a538614b3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53ed91d6-812f-4ef9-b024-ae5c5f0b1396.json and https://artists.proofprofile.net/proofs/artist/53ed91d6-812f-4ef9-b024-ae5c5f0b1396.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 0x29b766467a35645e6bf1e168962df701cd99beb424ee71ab324690975966b6f0. 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/TCAGN2279575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180fbef22a026fa6228f5498fc80e8b0e252bc7d39662a13a1227490cd0605fe. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:12:20Z), 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/TCAHP2391496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f65038f42e1d4c3df4a449994733df6bf9c582374e52f57cd594bb5233369f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHP2391544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c7eb2e5732a2a31cca383abc2edb3b72d0e50975427a3cbc0cf139033e4a8a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAHP2391547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72be085a6d2bc5279849ee82d2203908729755094ef90c108d98f55a35c23506. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/TCAHP2391563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422e930a4764734635932469a5fcc0afb853035fbe848c75d73b474842e8ca9f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCAHP2391567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1089c450f0c0b7bbd5beee9c452b214607a53bfb56e2deaf03cf53ec5c804444. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAHP2391514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2387b19fa7b0a6ba81f235352a4caa08ac636148f85aaf0d32af4d59e3406c0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAHP2391573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebde8833107edd03796e23038d9428adcb2636a4fd9f7def54ee2b80432f38e. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAHP2391578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4b90a48815cd9c98254a13f656321fe739d05b22e353b7bc3922adb40449ed. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES71G2506070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8199055af1631de4d66ad65a82064170c5bc941af5185e3f893d1b58f139af8f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:03:25Z), 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/ES71G2506272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4b90a48815cd9c98254a13f656321fe739d05b22e353b7bc3922adb40449ed. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES71G2506070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8199055af1631de4d66ad65a82064170c5bc941af5185e3f893d1b58f139af8f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:43:28Z), 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/ES71G2506272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0490e32826f284de9e7998d7708a216a60a59a9aac7e9516e777e9960effe70e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QM6N22592996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7319135c23c9d5fafcdca35097eba28ea65cc5e31e39e973c5740d87c2e9b99. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ES71G2509781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4b90a48815cd9c98254a13f656321fe739d05b22e353b7bc3922adb40449ed. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:13:31Z), 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/ES71G2506070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795d6cb05abd3e87df0381fe105c7c222b4677995823a520906dbc01c747544a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM6N22593005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1e0b4e0b85e541ee7e2393364b89604a048c318b479a328af5439337c33c4c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QM6N22593009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36137311491b2350756aea62228c063834ac2694d03652ca1cba59f768344e75. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM6N22593020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082904c7a2a2bf95d79bc12ab56e164b29d524d01a4c138e390f72498d36e9f7. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:04:27Z), 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/QM6N22593026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6920b13f057c912df5cf3f5626fb63e2846012e43f70647cb6a7501fcc4525f. 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/QM6N22593042.