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 0xacb8c44fc2dd2e78c8ad83264568bef44d6efa921e74990d610d8776ba8b4b51. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/689f2f7a-e181-4633-8e36-e9d70fd1bdd8.json and https://artists.proofprofile.net/proofs/artist/689f2f7a-e181-4633-8e36-e9d70fd1bdd8.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 0x069a83424d092a1e9cc5af983f7b3df6e9316eabc19c98e5da30882245e700f7. 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/CA5KR1038766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5210d4b4a9fb2642efb330c43664c33e572f33b29291a088eb3d626fe5d981d2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR1038772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea314d6aca40197f1364cad48a4b5d908e164eb4c52bcab66a445b37a1a3afdc. 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/CA5KR1038768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee68a58f79b87b45207916dc4c87f34ffb1ad4007352812e817012ef8746fd0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR1038767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f0e2f20a10759b58cc7b18e2a1e7c01032675306edc239a4270f88572e0419. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR1038771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6634b397311c29f9c736eaff2e2dd9f8f94d1a3920046ac2b2e6400094a807. 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/CA5KR1038770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd014ae2cdfc5b8abb253bd748703852a063e7ae19de0c203dec32fba15dd8c. 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/NLBW51300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94b840e19e7cb45a155e2c282948dcf4e448dd3e3bf3e3106083a49d2271b6a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLBW51300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f801805e70efbc0879e6e27656ccf41ad29455c5e0cc4148c68b7ceb2c69610. 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/USTCZ0987078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39725836a2b066c3a4731b69a02c1974728da4a019d18c11460ed91bfe8479c. 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/CA5KR1041255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a93ea28594707d222e72c84772a4bc9723a3a7bc49775fadf2f33fd8b93d96. 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/CA5KR1041248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22740e0fca9a842bfbee7d943ecb3b990ec1a44eada27cbf30673408ce5d7013. 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/CA5KR1036351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb686224064a5b5b34df49679d13185617a83d321155e69eeed04b82477dd3f01. 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/CA5KR1036347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b1dd7a664793ee20e3e61bda0f3e940e1d2746d0da1868816509536a0de0e1. 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/CA5KR1036352.