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 0x35b60a3cf95b4c0aa3ab0dbf49b7abb762610df4e3bd63f81ce999bac73e7db3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61d5209d-6a48-43df-bc20-c9f813780be4.json and https://artists.proofprofile.net/proofs/artist/61d5209d-6a48-43df-bc20-c9f813780be4.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 0x1c738c4ceca8b6260713bfb971c6947e2956edb7070441244eae19e92276e09a. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/MX2832135102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aacdbd482fdc6dd86791402be6258b50cb7a0a3800bbea8e150554bbbd81945. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:44:02Z), 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/MX2832135110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd89015038448d840e469ad1e7c8b57f45f271dfd90f2a3ddd445496f71e1c4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:01:42Z), 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/MX2832135107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc54380f2715e4eba5a21015c2f7a0ac733bd40fb4e8cb5fb35f9a34f90f519. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/MX2832135392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6bf80b4fbc870104e691e2f1005a07e6f228e0cc3b84d56e76adcfcb0291d0. 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/MX2832135391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c0d18aeac60229cdd75b53496f9b5fefca381c335928579bc9df9796e38e68. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MX2832143982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c3f02f74abbe1722a57876ad9782550cbcc73fcbc47317d3304f8841288566. 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/MX2832252135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8d8d3ba2299e1bb5672c67ff270746341dc0b905a53de2df8a02389b74f066. 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/MX2832253018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36735eca81f6cc46ccf328bac0bad8f5587d20146f3431fb321684d2e97cd42. 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/MX2832300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe3b6d3957ebf0ca25bc3aed89889494bfbdb7d470d793cb05172cd015fa453. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/MX2832308840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1d6e5a913362ca14de1a79d7da292b878faa5d4e75267d0dda8bc6184350a3. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/MX2832408788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc4c527cc039b302306afe3e663a8719707e46a5cde99ee6d81ac409dae649b. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/MX2832409382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc380af92a6d9051862db8c85b6a2cf57255e732195fbd4f476f552c35e606c. 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/MX2832457041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d177805e4e318600b1b44fd4844671cfb0cd5968ae0f8a1541d1f7fba77bac. 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/MX2832459966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa120f42e33ac3789bb6ad635abd8cbf8a3217cda0a480ed1b2806d3df888edb5. 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/MX2832461266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19e1abfb5f9e569bd12643c48495bbd4407d51f5231d77bd01894a2f818d287. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:13:09Z), 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/MX2832560929.