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 0x422753edd1ed21795a10142e896b5ebd872f4dd6a929820a98c8becf936fc3fd. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/477edb47-bad6-4d5a-84ab-8fc1e0f4611b.json and https://artists.proofprofile.net/proofs/artist/477edb47-bad6-4d5a-84ab-8fc1e0f4611b.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 0xc408fb259db3332f4f6cd778df08fde7219b3827d5339823873473cc054ae582. 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/QZW9K2431913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b227d5f0a6e9c4793504c24e2f03f01fef79204551698d070b31ac44434d9c9. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZW9K2431914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dacb7ebdf1e5c31dd146f111993e52fd5a5f24e5beeeae36b787079a405189. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BX8NI2500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dca2f8731f6c1328f19ec6a8def4695a1a4d948dad5a59645d1e24822b8ae5d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BX8NI2500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0ed552c16ced0d34d4b18c6f67f1f9231ad443605c81447f115209a9205226. 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/BX8NI2500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ce850446af0a8568c77231e07721d9ecc9598ea70fef1b613648f051b08626. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BX8NI2500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8617f0508a4340d5809ca0ccca5c51aa05c3bad14ad1417655f8f81b7157b385. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BX8NI2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b37d30398707116b4782cbd55ddfb7efd74b5b148f51d4979c6175d9b20e5ac. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:49:41Z), 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/BX8NI2500059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166d41a5442af3435c973b6128f005bffe57207e13b75d0a7fea9a70729370d7. 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/BX8NI2500062.