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 0xc5d148fb718599b56842cb97c2549f3771aff3f768ed00b49233e78e0b72ce62. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b068bc9-90cb-40ff-bd28-cc0edbec17d5.json and https://artists.proofprofile.net/proofs/artist/3b068bc9-90cb-40ff-bd28-cc0edbec17d5.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 0xef827abb023d79fa95a75446c24a31b374132f70873d0a8d5134e82b7580ec2d. 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/GBWUL1943083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddf43a420870bcd3cc53342f680bdccc1d00fb510eb6e13b0a2a4f24702ee0d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:45:27Z), 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/GBWUL1943127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb56857cc49b12791bf9db34535b3199c280973d1240ac8493f0b0b6ed91105b. 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/QZ7R42351966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa327cb6855c6e2067f0644380c227792a72c5b1fa1a59dbf7a08f898997d78. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:00:09Z), 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/QZXLZ2386701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f210cf9373cf9a899124ee1c03e4f66da3cbd2934b870f19ecb6bf9a0b7a06. 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/QZS7J2319180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f210cf9373cf9a899124ee1c03e4f66da3cbd2934b870f19ecb6bf9a0b7a06. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZS7J2319180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e031f502c50ec598857926ece7954c3e2084bb417f20af54e318dc5edc8a0c4. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFR2508840.