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 0x9f4d624c224a5c721df0e70c769ebf78ac49ee72b91a03714302198d1447df40. 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/a110d87f-9e7a-4ea1-9c96-8f7e6be9be04.json and https://artists.proofprofile.net/proofs/artist/a110d87f-9e7a-4ea1-9c96-8f7e6be9be04.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 0x20c3735492aca28f08ef0ed9d71e73530ed0c74b430dc80c2406dcae69235322. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAFX2149033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c3735492aca28f08ef0ed9d71e73530ed0c74b430dc80c2406dcae69235322. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAFX2149033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c48bbee475cffc71bf71adc191101bc9626cdd115265b3beb95075fc1875fe5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAGA2200132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dd34e63b64552efa124533fdd6520b55acabd891e6d4ee284bfd0faf710287. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAGA2212913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4926a1d99f1b1c06195a2a4c84c8a46e5e0d003a5e4d7ddade9c31f699fe4409. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:28:07Z), 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/QZES52280533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4926a1d99f1b1c06195a2a4c84c8a46e5e0d003a5e4d7ddade9c31f699fe4409. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZES52280533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dc1d219f6bfa99ab7bf7c7df82ce54137f02c915b977d9a99e9e85774823d9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN42274672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dc1d219f6bfa99ab7bf7c7df82ce54137f02c915b977d9a99e9e85774823d9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN42274672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0592f560c096c9109b9cb4071da969774b3e79e7b493fe8665aa34491e62e6d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USACX2400726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97934db952e9708391a365c3ba499443fca73bae8f1dbd0a1b4ec253e39bccf. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:38:38Z), 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/USACX2500148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee955ac2a3f14ad975ca8f1800b28a54cdd1a7276fc3f5aa8f4dbd8af7354592. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USACX2500718.