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 0x9848eb874a33bc794b1c69e198461d1497970b5728f3ba395921cb1f75670695. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a98e971-40fd-432e-a106-de98c2a76833.json and https://artists.proofprofile.net/proofs/artist/8a98e971-40fd-432e-a106-de98c2a76833.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 0x5d43e36bddb90a33fdb2c408ca9b9ee3322d834fbe07a810eccda5d3aed418cf. 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/GBCKG0801220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a9868f439df7f138a17d2fb9fa81a790c0f71fdbb2c07ebeff4b7c8b424b4b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBCKG0801223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b0fdee16b379ecb05564f2241846ffd5fdf615305418a13803cf3935e11f13. 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/GBCKG0801225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d42dfa2808d38b4aec7d4480731139b36a6d898a82ab425c5099a155b2f239. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:52:52Z), 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/GBCKG0801227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad1ea9d563446c4fb4441bef73aa1213e221e0c978c4cfd09065817014956a0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBCKG0801221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a45841e80741403924e3537033facc80d8bc877c2f35c9bab3b2f8e2eb0eb2c. 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/GBCKG0801224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000c5104828af22e553299c4425e350eacaaabd6fcf0c134bb9dd538f3d9ef9f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GBCKG0801226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d42dfa2808d38b4aec7d4480731139b36a6d898a82ab425c5099a155b2f239. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBCKG0801227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e94601b053d0a91cb04caee2668b7c4a0c8912df26d88fb5cdccf39b4642e1. 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/GBCKG0801228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0e243e7a17e7c5b4f542cdeb318a399bae22fa46fdc2159e4d55bec4290c29. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBCKG0500396.