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 0xf62f22492380cd110591f5e70fae6dbcf60b36bcf4756d0fdddb4fae57ad1b3e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3559f34-b480-449c-be46-d52c35d02429.json and https://artists.proofprofile.net/proofs/artist/d3559f34-b480-449c-be46-d52c35d02429.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 0xd7bf1adc130511b72742acc2261ab0ea5ee4c277f76a7401af65a5eafcdf417c. 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/DKQ272000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecfbb0eecaa1a7a4692fada757d0eb2aa1070ab151c9b44f5a8f34ebbba338f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:38:44Z), 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/DKQ272000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d3ef38afe415ef55f4e73df0dd9b196c79b1c5b2c09d911802b013e5b21ffe. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:52:47Z), 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/FRX872434373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564b2f5d1effc56333f5115ba6727d26d14112c30c55990393d3fc1e1190fab3. 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/FR59R2564497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa188c932de096b66d303773d52c83953bd39f5cc649f6526639721d1a2cfa04b. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:26:52Z), 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/FR59R2564498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84626b09a90359b43cc17516363c9dfa16e948f563f0b42f60db9fdad7c52308. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:18:46Z), 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/FR59R2564499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cee242f19b68cbbe12726cb134f5b9bb28e8275defb18748e751f9702158dd. 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/FR59R2564500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83e70a3c0987274d5b37c7d037e868afd52dc817dbf997e67e528b8f42c2476. 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/NLZ542100825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d5bb976113833e9d395c6e6b6e957fd7ed25b26fcfb0f2f034019e85b42b45. 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/DKUM72000222.