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 0x0687112c9c47e2c35b0e45379f53cc81fadb94ff03e8e90701bf85525994344b. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b7448df-ac05-417f-8c32-d0a280f7a00f.json and https://artists.proofprofile.net/proofs/artist/4b7448df-ac05-417f-8c32-d0a280f7a00f.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 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 0xd903e3f27321fa720ce363c81e91d417df5813de53b5aee736c37daf6f439aaf. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GX4R52303062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608c2e2d631ed2dc9e7ab9b8ffa64cdc9829705ff82e6d783ca5d7054d2228b9. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/GX4R52359122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a6317cc08f2a3be62bef7ff0ee733206d530b0fa3a2013707eb35b647121f4. 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/GX4R52398818.
(They Long to Be) Close to You - Parody - Live 1976
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a76f84977a04d7d7a7513f4d4ecb47f743a9857ecb7bb549732bd728ac590ba. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/GX4R52357247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c6c6a5374e397d7062cf09146fca6c72c7f955f2423f5826007e4a929083e8. 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/GX4R52324963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd5fdaab04854b69b131b1a58fb39f162a5b825bfaf84809b29e15351a21adb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX4R52340702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54b09a57c22f0044ab21b9096c9b49ac4c88c3f7391512d20f7569f5edb6a07. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GX4R52351714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0201b457f309a671405f642c8e3dc387a331d4771a98a56ee1853b45a7b424f4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX4R52367892.
Medley: (They Long to Be) Close to You/For All We Know/Top of the World/Ticket To Ride/Only Yesterday/I Won't Last a Day Without - Live 1976
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45c96cd88854a939a2588413ee258cf2d1bbb3246f2ffa1681503d3780e469e. 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/GX4R52379893.
Rainy Days & Mondays/Goodbye To Love - Live 1976
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed62c1e0438e555ce2f8a4fa8ce9de2918f33891a6d1553cad5b2eb83d31c599. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GX4R52339357.