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 0x6fec6e77cd0ca3202a085faafd3d1c84aa5b887660d6d8ab8f4f622bcb74318a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/151518cc-0acb-4f30-8ccf-8847f9391543.json and https://artists.proofprofile.net/proofs/artist/151518cc-0acb-4f30-8ccf-8847f9391543.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 0x5031654d6c3e9dc20cbb300f73fe2d5ed87f3a7564b563589c1c43e2f79bcb66. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUUM70700565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251bfee31154d3caa45508c3aa683cc299442754553dc195c5eac845fc2afa8d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AUUM70700567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb93e36fa508b0d6fb9ca788d2f36d61923ca981b0e57faead49174c869577cd. 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/AUUM70700569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9a48ed40f62a2b9378beebfbab22664fc93120dd441e2bed6527f3fa51166a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AUUM70700571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdc7854c508ccced0436e124f20fb56848dce6654dd97be13b483a2c1ba933a. 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/AUUM70700573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d8029a3ad5979d78fae981747173db62467ebfa19aa2780895b53b6161f5e9. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/AUUM70700574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b95756427ecdaa14dec3b7df4fed09065c45fe1e830a2814809743f5b8069f. 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/AUUM71300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a10103dd9646fe876d1b6750555e11cb43dd314c9a3dde58eeb8bf0da20620. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUUM70700710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc095331a07d0ebecf6b670b5e623015ba45916a562370d640915c91fe5aac52d. 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/AUUM70700572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc095331a07d0ebecf6b670b5e623015ba45916a562370d640915c91fe5aac52d. 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/AUUM70700572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc095331a07d0ebecf6b670b5e623015ba45916a562370d640915c91fe5aac52d. 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/AUUM70700572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc095331a07d0ebecf6b670b5e623015ba45916a562370d640915c91fe5aac52d. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/AUUM70700572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc095331a07d0ebecf6b670b5e623015ba45916a562370d640915c91fe5aac52d. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/AUUM70700572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc095331a07d0ebecf6b670b5e623015ba45916a562370d640915c91fe5aac52d. 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/AUUM70700572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc095331a07d0ebecf6b670b5e623015ba45916a562370d640915c91fe5aac52d. 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/AUUM70700572.