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 0x8dfb02053a83438e403a89a315ef22e4672e9cd857752e56622de4f2c5255460. 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/02480eff-3a27-49a3-8900-e50fec83e2e9.json and https://artists.proofprofile.net/proofs/artist/02480eff-3a27-49a3-8900-e50fec83e2e9.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 0xf81f6c7becfdd343b07836b94b2909905a850f2ebbcfb426347332f14fa4f991. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:40:33Z), 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/TCACU1623371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1455d181a8858b2700a89f7f6832d142e44e62c9c9647d8e0d1daf0b877ad9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCACW1797627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d816041bef103f7f63c70c3d00576fd72b27f18f4cd966528be096cbbc829e6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCACW1797430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf99a0522fb2fe71babf305bd40d49615cac26b5495148b041a70abb8a729a8. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:22Z), 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/TCACW1797431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6304c93dc64e8ab6e0a858121beebaa5916af885fe31f8b12368a9c07795f8f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACW1797453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331ccd3aecbde26d042c12e13447279c3f405598dafc5380161fb912b3e87b99. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TCACW1797606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3921ee7b3b23eb06d19255cb0601e8e30c707112def1ea65334b9616ceaf3368. 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/TCADO1800612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b096736e56c870c00eb55e83f9e4b8ae44f374bacb8843aa48b3fde62d5a00. 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/TCADU1873771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ae345819615bff9da4d4d733cbbe7c0b27798d6e90d410998311f3e39c0542. 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/TCADX1875399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83382db39403fed8cfd60b44490448565012a47e37116b3ce7ecc41ab51b3496. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/TCADY1812366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac074dd7168b3c3ad086240bc4480407aca176a275455b4d755b412776072755. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFB2076222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce089a72155f440b0fe116584a24c525260184ee12b5d561fc2090ce1a41f9a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:29Z), 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/TCAGE2230262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8aed9943d341308086b052c247693325878755948a92e72d01580b1cacf73a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAGL2204446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8ef260ea43b640f893564fd0ad87b0d989e0489e403387d309c2cc41a04390. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM7282533515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d38aa87be180b024dfe92b7223c2108c2ccdb259819ad2fcf00bb433eff5d1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM7282533758.