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 0x5fcadeb409ea60ab6c0b8f1d9e853fb9fff236966780ec0134e2c61e2d014013. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07bb222b-8484-4429-8a2a-b879ef836c6f.json and https://artists.proofprofile.net/proofs/artist/07bb222b-8484-4429-8a2a-b879ef836c6f.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 0xc43845ce1a22be9ce50d36d8a91d8ba7b6084f246d7b0c8e0822002eea4b1ba7. 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/GBLFP2305178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6cae308107a26bb6ac41b42cf94e4e3d266055bea168b9b2265daff7bcc1dc. 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/GBLFP2305179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d27d50ca996ab0f279f51f9d576e073d440f3c69bbcdd4df26bebaf8ea2f160. 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/GBLFP2305180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded6da099414b993d94fe82324b3ef1bbabe65ef1cc60bb2512f20dd3926ba53. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:42:08Z), 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/GBLFP2305181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317af83088c099735b0c5181c21437d5072c73e6d9156bb3d2be8864a773311a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBLFP2305182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59daa7c51737623044f3a8a14119afbd0206a497177de184ddb54c2a5127a743. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/GBLFP2305184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66c2a4e6b28f8cfeb1144ac16df299481ed8a506fefb0ae58c0beb072e89f17. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:19Z), 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/GBLFP2305185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9c3dd6b63dc400df76e58b54cc8748d53bb6497520132df55050d13d347da6. 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/GBLFP2305186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab09c364a750b17004d57f82c22c5771db5ec0927f391092e15efe20147c639. 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/GBLFP2305187.