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 0x9ae58187bb903a71da5bc94cedf181cba09c0195fd67068bb9e517e47bc62d47. 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/039354e7-042b-408f-96da-2778e3502b92.json and https://artists.proofprofile.net/proofs/artist/039354e7-042b-408f-96da-2778e3502b92.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 0xac806de51c443d2166a9e7bea91b6e8cc2cc20326f154bd51e082e0b6d6cdc1e. 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/QZK6J2166626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d22c9e5ec8c6e8fa03ab17f8f59b0a3795be5bb7b44cc7605793cfca38b3aa4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6J2166627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3405652e0094ddf6bcebb69fa888645fd256a235e10df5229d5d28cfd6e30e2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNWV2242774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd852c9b4073d0c6693c28c90f8d03a4703701579c0e48866ae42de687a66792f. 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/QZTAS2225436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864523c5e81812cff5796f0ff7ded8fa41ecaa7569e74f8b7c0f82201f8cbac3. 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/LBA0H2006810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a97db43a098778d372a84f81c39437463bebc782aef96c4dbd6bd1d1195483. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/LBA0H2006964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadedb2ad69235a3fa878c33ccdb650239fb0788dc71176b3c564872ff9e08d72. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/LBA0H2007359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44566548285fafbb76dca37275f846ccda6786eb7f5c1e728f256d19a8c3421f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:54Z), 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/LBA0H2009190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cc56e3c8eaedc88a90d850f2d6cdeb9fb0b433a49a547b3f94ed436216a26a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/LBA0H2010657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92b1a2810801579d20910377d7383dfe320e4f969c4f9bc3e3f722164e69a44. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:33Z), 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/LBA0H2011278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f6bb269e37335aaaeabb0d5e40c7cc74cea37f63d312f314f59796b222b830. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/LBA0H2011358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb94270d8204a7a02301f728f6079dc6010e737b741f3622312bb5ccf99510e. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/LBA0H2011454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8849dffaba1cb741d2259cbc93ac498c5b0140d30db679d297b4e6a8febbfbc8. 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/LBA0H2011748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91464e35f6f5de1c9eeb119084b5ea395e9e0e05cf83941a0ee666f7175cccc7. 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/LBA0H2011824.