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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12e4f19348e935d6845d2a0377033667aec9925e3560b442f8155951e3201e8. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91b29ee0-102a-43af-9efa-f0268180cd88.json and https://artists.proofprofile.net/proofs/artist/91b29ee0-102a-43af-9efa-f0268180cd88.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rogers: The Musical (Original Cast Recording)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb41b96fbaffa51445c41a5f51261f5da01b825ccab208a4fb03c66226d1372. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USWD12327797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda8448691c3386885a45c1bf1250213312dde3eb1af1abcfde45969e5b06e2e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USWD12327798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1534fc0ec7646462a89bad4773059590ba0fbdd97872a4c4dfade0c94d6c31. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USWD12327799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd954aa8abdc4549ab69caeb65a2c7b329366bbdf9187f8f9c877e7dcbdabd257. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USWD12327800.
Star-Spangled Man (Reprise)/Just One Dance (Preprise 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5950fbcccffbef5063b4fd267e09ff491e9ab7c759b932b94008701587d8a3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USWD12327801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615a220ca4b4809019631d619c094cbf3522e046e8e4702399eae5d2144e41fc. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USWD12327802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa774e1b70799cdd234c26374c010c5f27e358dd48a4cb564582ce2fe9215cede. 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/USWD12327803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90edd318f32c65d7ec0edb401605d08bdc2c8aa645c98ab68cdeceba0d1f200a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USWD12327804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9501664b6c7c81db1dfc20ba179d2ff26d4044a8a58cf710086c27f10689bc5e. 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/USWD12327805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d52c012c7221be7bb87317ec18660b23d4d39bfe4fa1d2fc61c39228bb29b7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/USWD12327806.
Rogers: The Musical Finale/Save The City (Reprise)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabdabccc7764fe4e5fdd83fa4d79a78b3af3d01cfbfeb8fbf682a7d64818355. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USWD12327807.