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 0xf2d0fcbee10767e316c7543045bbbd3d16197153939609e50229e45ab6315b6a. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37311660-b8a3-4b7b-9737-1024be88565f.json and https://artists.proofprofile.net/proofs/artist/37311660-b8a3-4b7b-9737-1024be88565f.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 0xd9850eaaafb3b5d505e5f9a237ae0f759b5c9dcd39242bce21483f24e73879f5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GRFM10300748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c74392f1676ca52f12a7936803c2eb246767a52c88d6569556d463b2fd3a4c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GRFM10300749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d9fb2d28b5663ab0094a0b6fc660693bcfb279bb87f4188cb42bea33095c9c. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:04:30Z), 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/GRFM10300750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f10fd2c1c5041af5ff75f65f126d7db909ec7d3153dc57cc3092104ceeff920. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GRFM10300751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93e1ca80feedd858147c884f2f59982b80924b66a4ac051dea1680a83a16f01. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GRFM10300752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae269e931e09fdd2998722b8f304eb97005c279a67a67dd8845b6e88d6bc4f90. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GRFM10300753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255476d265769f155e28b73ec7698a38dab45cfbfb18424dc4e35193afb0f69e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GRFM10300754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b12549ddb4f7d0243a462bb0464aa85ca0f2de1e4bb00b3e2d2bfb3dab5425. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GRFM10300756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001758b9a242fd24375f01bfd6926bd328629bd2e4b146a1561c18e82e7e87b7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:11:33Z), 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/GRFM10300759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b43e63ec822509d412f11f37a6d7c4c8b428720494784a16342fac6d974241. 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/USA371429936.