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 0xae486412042ab7d7fec80c531522587718780ce4950995563f2b5281e9cdb614. 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/86a13ff2-41e9-4814-ba20-4776111bfddc.json and https://artists.proofprofile.net/proofs/artist/86a13ff2-41e9-4814-ba20-4776111bfddc.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 0xa6933a569696a67fa81e195e166bcc637a020f2cbb9a881417a79ea8334836cc. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QMMG31200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9f622a2f61b43572a6d533b020eadcaf7ddb7604203a35ab7bcf0584bde53b. 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/QMMG31200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b54e6a111712a07d87fd83e5d584ce7024c22319080c3e775ee4ec589119778. 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/QMMG31300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d752e261bd19137c19630dc1cb16278ff32422d786ca5732f1bc065fcf5254f. 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/QMMG31300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c641eb948d930880d21c90f0199373c37f44a428deeac584491520d0cad9e9c. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:08:36Z), 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/QMMG31400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345f0ebf730e2f3d66df971c2b7d149c3050c48bd844ddc9c428972c2c19a1b4. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QMMG31700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d9b68b7bcc497a68f127e0abef3cbee0ebc31788d7e6dc1ff8fb88579f0535. 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/QMMG31700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa028c0e4803b5ceb28a1a76f12284e06963430589feede19e6aa065581508c1b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QMMG32000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f79d6ed716e0418dc3eb56a792bd2160a185957513fd33328c55568cc39b06b. 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/USUYG1378671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f2b9a30f69bafc496ff237bd1701eb07cc7b3e86ab6b7c27d1ecec440e89e4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZWDD2386625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df86bcdfe7f22279fe5537ca6376112ece6c41b789d104d5fc99d557939d713. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/GBWUL2464966.