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 0x5ef4727bc8e9955066c1c1cf0cb5279a54e74e73f14223e9dc15a5015aef68e5. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0aa9139d-cb56-40ed-8942-b3de27cf7544.json and https://artists.proofprofile.net/proofs/artist/0aa9139d-cb56-40ed-8942-b3de27cf7544.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Oklahoma!, Act 1: No. 1, Oh, What a Beautiful Mornin'
Rodgers & Hammerstein's Oklahoma! (Complete original score)
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 0x2a0eb516ce6da5084e39a6755fd01d755ba60213bf7373646fdbcc03b858a32f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLWD2304902.
Oklahoma!, Act 1: No. 3, The Surrey with the Fringe on Top
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133657ffa142ac550f045230956270ae90415d811194783a69e7b66d02ab07dd. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBLWD2304904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38307790d49057854060f9aa0c7c73cc02655ef0c1e6a206f82ba0d74342f9f. 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/GBLWD2304910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418b8ab234be4ba2d4217a4d930e289b602a869f238dd5fe07f1a3275d53a2d5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBLWD2305014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15453b8263b01435358fc52ad6ab03ff26163321dbe469b02826957fa2437f67. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBLWD2304905.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Oklahoma!, Act 1: No. 5, The Surrey with the Fringe on Top (Reprise)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba5977f20219fad76c63f62487765039d85c65917e96f14a9f74b2cbb0fa276. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBLWD2304906.
Oklahoma!, Act 1: No. 12, People Will Say We're in Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f264f3d1093099fa29d829f0604d8e2c239556695b452b670b07022662ea65a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBLWD2304913.
Oklahoma!, Act 2: No. 19, The Farmer and the Cowman
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95033ecaa0f6dd69f184aa1bab4110f17706ad0a10267dc5fee3e68b3705d0d8. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBLWD2305007.