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 0x4a236bde8f374112266b2d32601747f9c822206df317595b9f91e31765a3c597. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc6eab52-e19d-40dd-bc5a-923a7a037064.json and https://artists.proofprofile.net/proofs/artist/fc6eab52-e19d-40dd-bc5a-923a7a037064.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 0xa0e2ab5cd29fa7d82bf4c38039e7a38e3072016540ac42115e4778e2b4c76115. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXF9Q2595683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefc2013d9861dd34ae68cb3c33404606a188317b725271048328138dd0374fb. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GXF9Q2595684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ae0a24038c07374a6cc99052531a1cdac1d9c24b1bfc4f9d402f05f1d2040e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GXF9Q2595685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e63c5745af48db40546b2dfd4d471cda57188fd4f4004912a43ae6b7bb324cb. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GXF9Q2595686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2332c9d445364190a47d2903408f7ca83600ec2108119f4e766618db102922. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GXF9Q2595687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5360a2efcb9184f3cef8c62d94196e063ae6eac8ceca0cb027fa44003e7c7d. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/GXF9Q2595688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da3510c93fea9a20a8141b4fe6027ad7103432147a01d67503704584e3d382a. 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/GXF9Q2595689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73740d4ee38e69dd38b794a2c7e29e1ae19ca6d7d68049b1a5c4fbe0e04b59b6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GXF9Q2595690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0c64bcd91084c07ce4b7c27a04158fd738b8fd9a4fc493a9c6dd2db48883f8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GX53U2511744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38dc10b6622bc461bc982019504c542a97bc117722ebb5d71b86519c85bbb8e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:59:45Z), 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/GX53U2511357.