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 0x221bbe648c514b4a72f33cb015e47fed0c90c88b9fa50f4583fdfc629a5767b0. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de21ecb2-a96c-4720-9b6f-6bfbd1e120fd.json and https://artists.proofprofile.net/proofs/artist/de21ecb2-a96c-4720-9b6f-6bfbd1e120fd.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 0x639fc6215838810bd8e484ae150d261c99b0a81b08c725b6893d924b0a802952. 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/USUG12105367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c6d224fe77a5fef0daa14beecd1a241f0de09218939e334e074aacfb2fce49. 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/USUG12105372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa8a4435119263edff197eea05781c6329ad8f03b2f9f77952552898d534e15. 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/USUG12105370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794219fb52fb24d3ba25ccd32488da1f532b330cb5e684fd78c3f948badfc3e0. 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/USUG12105366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974910e013b6b5c22b59ae8db1e57d060b46fc9f31eb3a19d396b2634572e032. 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/USUG12105365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf911330f0441b7e67356a6017cc901b63374e144dcb6015875d3bb66079410. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USUG12105364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54040a328b554a10c8ed73c5750ca432e934d8ec3fa32c9e74e2ed211a64f537. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USUG12104908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79d4b3f5a74424088e9baa3ad49eed84616d88979c9b9e4142535bbfe15cc7a. 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/USUG12104907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7a433f980f61114f21e4ab5d66fda43f5d1478f5270a72fcd7e2c5d0d6950d. 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/USUG12104906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e29e97c8be3a8e8278597855b8683b56e7681e9aa0817c37b612f89fad6bdf2. 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/USUG12104899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f4b14f279ced831173ec3ab166bc26981cfbb2426804e529e13c12126c0ca0. 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/USUG12104900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd722928a13197e6f9d8d31c04399f6c760459f4518b9cbe1984768c478b9f4c0. 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/USUG12104904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e579e94489fd9745aed20f0ddf22dcab5da36bd013ccab1fc37ce0abc40b1c. 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/USUG12104898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01101674e4f17818d23354f687ad2f88d7c3b6a3fb847aac17f9b71b9534ee24. 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/USUG12104897.