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 0x2456918195034a5ee214ecc419e89464f7f96fe0a98b4f0f8f73899de8a33adc. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fac5fa4c-ae60-4112-ac59-22069f5fe0bb.json and https://artists.proofprofile.net/proofs/artist/fac5fa4c-ae60-4112-ac59-22069f5fe0bb.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 0x5ba35bade08ad6f4dc6ab756d84f34d5ee07f795bad381946cad5ef6ca0c3464. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:35:33Z), 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/QZFZ72580913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e7db267addc5309928b6bec5cbd7f77354939e14faf9da4408230b6e5fa711. 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/QZWFJ2516412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec9eb29625641a0e8315262accfcb04d6b6fd1a8f78d5d657a3d943ae840c8d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFJ2516413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7639632b2423dd3ca4b88414b78f05513fcb4430394ec20e61c2bcb8f0a12d5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:03:47Z), 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/QZWFJ2516414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed77cbdc235479deae8b65efb4c8c007ce50a6c3824e0512448d7a7a3ebbe77e. 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/QZWFJ2516415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d05b6abfb59f880be6caf4001ea478e6bacb26fe2ae2aa2dbf6e0b49bfc22b5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFJ2516416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763eb9124bfd1339e82523d4911036bbe7cbf7f60ded6109fcb8942261d037e6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:18Z), 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/QZWFJ2516417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0571bbd067d67d70184186f03c86e64b480de73e3dc5483b7585ea1ce1249a. 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/QZWFJ2516418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f800987e16007ebfd8b501fc1273873b256f63375c23d7b9c8139b38e6251c. 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/QZWFS2571073.