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 0xcf83d98f57c2b61dfcb0626f44262064593a9161864da696b0300cdc35a07bc2. 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/d458d427-f0ff-44d7-b42c-a5fdbd294c38.json and https://artists.proofprofile.net/proofs/artist/d458d427-f0ff-44d7-b42c-a5fdbd294c38.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 0xe6ab848aa6302607cd3e0ccc38c1ae2a019f267a4f47f464762403f9b362e5b7. 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/AUBEC2039272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b890c1f5ea63d3c3882ee793a49e775beb959a8bfe1d2d5a7029fd86c11eb4. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:56:25Z), 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/AUBEC2054612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550c2fa4a1d68997df6fc2b04806cfcbf7d7ed1366bf3ea62060d8376ecff678. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AUBEC2057622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62015c061fda0fda70648be0ec24ee5332f3e79552f6915b59fd5916241644b8. 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/AUBEC2125272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b725658da913905d5afc2b3c43330f96b8b76f1a2387607a3503f82850800e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUBEC2125276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96293ae86c31b7d4e76e126ade923c7e4ce995518ffcc6363c577f7c2e1e683a. 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/AUBEC2131474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb75c7e336275894189378fe577b8408e4815e5bf8f6377ab082edd19efbcf7. 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/AUBEC2156470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22bc1e947e2cefaa59bc3ba5d5afcf3b4502d8ffbae05f5901def790a33634c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/AUBEC2169631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b1f2dd106cf115460342400aa14876671d313f59d74c4a17eadc0950103881. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:04:12Z), 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/AUBEC2182255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fb42a0a0fd06a89877ad8182dffb2385c9be81e88df0b7cd465a647fcfce97. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AUBEC2183473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a1004c377238a6b19704c90fe9bd71010d11170ca0f3163405bc7d27f6349b. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/AUBEC2573878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e923c6333e62359ea6cb6a87883520c28b7afc62854b790b573d72f9698baa3. 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/GXHAF2513444.