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 0x18e23a1dc1ee38f7fe326c5b9d3cad7f0d4c5175d17796cb0d3d7ba620b2a962. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72b258d4-d60c-4ad0-a74b-2d68eeb8236d.json and https://artists.proofprofile.net/proofs/artist/72b258d4-d60c-4ad0-a74b-2d68eeb8236d.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 0xe3f6678f74ac0f7a3d9ca6f89c2870734b7be441e31fb83fd4ad4e5301f55f9b. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZNWY2451265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf620c241a22c4c04232dd0384ebf749a4b2e2802ffcbf1c108ae5dab7da5dbf5. 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/QZFZ42577965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b60b7f05c3a4869b0afbdefe782033e8bbd1b4d6520aa2fe57595745e9d889. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ42577966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dd931f6b56852cb4766a44a6ff526bbc95292eed684813301e7ed599eb001f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZFZ42577968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e1b651d2a50e54f97fe7e3fe6ba31698a2738f24c18a25bd122bef740c0459. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZFZ42577970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a2067de17afefbd5387193c4c06bcb99c2740e14e7c3e068fff34531634d1d. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZFZ42577971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdcc06cfcd8ed85ac7d90d61018ee67c64ff403097595ba9d137e08f6f48f8e. 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/QZFZ42577972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02025e1f448d624399e6ca953ecbd975c78b00ff7d7c384669f05b8582d94568. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:59Z), 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/QZFZ42577973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818bdac39e429e29fc54171b597cc7eb3d363557b2a3887ba2a92515b5d54d12. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFX2518834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd29283762a0b62fe4d1a12cb69995d81e0139654d7e36066dc54d6d41f3ab7. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:34:45Z), 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/QZZ7Q2559328.