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 0x182d35781b5e002ecf1a065681da09be1ffcffadca9d3016ce1754f7d00cdc3a. 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/93236aa0-4171-4f8c-ae8d-26cc906d1953.json and https://artists.proofprofile.net/proofs/artist/93236aa0-4171-4f8c-ae8d-26cc906d1953.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 0xb790d42d25c871790e1fca646a537133f4acba741851182b371f7ab939c875d5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKM2L2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631b22ebf203d46119ec6e374824c6b9640801dcfe63711e978f05b499f15625. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BKM2L2400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6607a962798650cf436fa312b918fe0e49e20c7e6fb1d2c940130573d718ab5a. 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/BKM2L2400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa284d95b8a20f540f6f4af0a549c51c2067196798945ccc8676306de66b03367. 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/BKM2L2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576f1af6746ea1674f8f4679f4b2126700e80fb9947f3eb1de5cb12fde226371. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BKM2L2400342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d6b567705e4f15ed2ce85c9c3517629fc1ba1f497e2d8feae484d3d3f42e33. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKM2L2500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e7d2cd9a009d1e692d87a44a57ac96edcd3efc1378acc63954345f78853069. 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/BCD592400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dd2d81b56d9dfd4abb0a1e0b9d69abb78f92d5d2736bdff45853b8b86b44bc. 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/BKM2L2400300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa284d95b8a20f540f6f4af0a549c51c2067196798945ccc8676306de66b03367. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKM2L2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dd1a0b6292674111ebed7a1e5386df7f9acd8b0ea3861d3e69ad9a1dd9b878. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKM2L2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576f1af6746ea1674f8f4679f4b2126700e80fb9947f3eb1de5cb12fde226371. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BKM2L2400342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631b22ebf203d46119ec6e374824c6b9640801dcfe63711e978f05b499f15625. 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/BKM2L2400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576f1af6746ea1674f8f4679f4b2126700e80fb9947f3eb1de5cb12fde226371. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKM2L2400342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fac452c7cb7664a963e9f04fbb41cef21059dc4476ae67d4926d5f7f692e169. 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/BKM2L2400423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2386ef3a22a1629aae207007aa6f42a40333c9d4088e4459ef06e0f3fc51ca8. 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/BKM2L2400447.