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 0x8d52ff430bbb00fc97604f31cfc998b4fda2732a17f9e2e6a2fb05831a85763c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99a8ddc7-65b7-43c5-bf91-d37b4c03cde8.json and https://artists.proofprofile.net/proofs/artist/99a8ddc7-65b7-43c5-bf91-d37b4c03cde8.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 0x8fe604f43c698ab4fca61a646461ba0fbdc12171e5d85946d72085c4352ee399. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/IEWNY2484916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac48024eefd9ff23b472a89550c0c4210a90d4492efb75915c7e6c3bc77a79e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:48:39Z), 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/IEWNY2485147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8123a5c1a7776416b929fc0593e80986fa7b76dfd787a7191f5de133a37b87. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:41:24Z), 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/IEWNY2485149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd927f1ef786ad984d2da53a4dc91a4143c560f82cdb650419759a8ef8d65c903. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:17:30Z), 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/IEWNY2485151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5d96954dd95fbdcc317147d5cb12093af77c56bd8ecaf80ccb7e997e13bf0a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/IEWNY2485150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe604f43c698ab4fca61a646461ba0fbdc12171e5d85946d72085c4352ee399. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/IEWNY2484916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac48024eefd9ff23b472a89550c0c4210a90d4492efb75915c7e6c3bc77a79e. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/IEWNY2485147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8123a5c1a7776416b929fc0593e80986fa7b76dfd787a7191f5de133a37b87. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/IEWNY2485149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd927f1ef786ad984d2da53a4dc91a4143c560f82cdb650419759a8ef8d65c903. 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/IEWNY2485151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5d96954dd95fbdcc317147d5cb12093af77c56bd8ecaf80ccb7e997e13bf0a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/IEWNY2485150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542e9718661c89caf8ca8bffaaa423d8e01ef2c435330bb82be70e197fb7d4c4. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZK6K2515039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7100b9ea77eaaf3e3b69d897bcb842aed99b5d190d103e2a4aafe1d2b3c99c0b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:06Z), 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/QZMEP2516858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747e60553a38bad6033fc28f83a5539b821adc7e3af85c4249fe06cdd2af7bdd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB52542088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e34ffe75bc9cd9611fbdf64662ac694a1fed5de2b261c490f48ea4b44b0936. 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/QZZ772530989.