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 0x4ac7dee22582b74026ce611dc8ae6ef5f7921ea53ab094976290193e3331ee12. 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/4ea56522-aabd-4777-b613-34c8805ea4a3.json and https://artists.proofprofile.net/proofs/artist/4ea56522-aabd-4777-b613-34c8805ea4a3.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 0x218e4815ca2cd3bf2265b84551f7511ed5d78cedf34f7e3d17e409a8011e6d20. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKE712200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43362dbb54e3e3463f1c30537f9d9902fd42f922a3e6dd0d5de15b9c5da8816. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKPL2162695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2978a8cac25f16726df1ed3fdca66157d169d4c9ffb8b2377179353f8fee5c8e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKE712200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52c2fef3e526e5c7d85e05f28f4995b4bf849cc922d59fab3bb87c5b7d63fd0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKE712200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65968f5e1a05fb8e02bb67c5f40fcfe6f4067198e2541a2aa0c562352af58d5a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKE712200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218e4815ca2cd3bf2265b84551f7511ed5d78cedf34f7e3d17e409a8011e6d20. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKE712200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb44200fb9e92b93b0d4bee7f32d430b8b76b2b68bec42b1115c1df856a80da0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKE712200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025fc0375be950b537bab089aad80745deaec0ac3d920dff3e44bdf4697fa29f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKE712200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27155e4b7304b48ba0e338df36c801b34deb417b9a7e751857a7c2064ed4ef7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKE712200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965f5938d5633eefb80e39602f84581ab00822a14d0775d80150169357e6811b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKE712200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8509ed7bed13e5ee851282ec5cce6258b771f67517df2d6d9403520abec7b0e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKE712200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fafe8427328c8d2f09fe49a881d0243562b2196919c728e36c654e382e71b46. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/GBLLT2416005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7eac4ae413c922307e46d3e05fe4bb1d67178fd7ba34717432ac4ab2c3af975. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:43:37Z), 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/UKXN22217193.