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 0x44855b8331ed2703c9b6b32fd6d1214e1d5a991f2b89064adc7329508963e289. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/411ac68d-44f1-4166-b3b4-79a0d1ce7052.json and https://artists.proofprofile.net/proofs/artist/411ac68d-44f1-4166-b3b4-79a0d1ce7052.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 0x409938bb18bf544d58846373ef5e9969619f08189d79a7649ac66d2c24f66d37. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/RUB421902086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf878395a01c2f0f6d83440976d317399d1c2358001d871e3f7310261db750328. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/RUB422000992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4d1342e2ef9c0c345a68a97f6cb5dd91e975d712b04ff9436a615f175c117e. 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/RUA1D2104481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafeaf67043acd5291583756dceca2a754c906f16416006e82375573a2e432348. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/RUB422100666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a4f000f26bf63f05a51da356c85929c55b46a396f939804080f0b35319bdc4. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/RUB422101436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b1c670146d997c39a04898d93fe9c2260bc354e4eb6fb2173d89ca57b9b5cc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/RUB422200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762473c7667861c1dd1075a3c11133a0ea3f4cb9645e17fb4e9158fc9c1bf813. 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/RUB422201526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e7fbd240e8c6db4a7bf9e37ba1f2f6105d994d9100ea91150b9a6891463f68. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US83Z2230779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9ffb4c04ec850db331fa7c9d61b0e7d00c9466f42cd7e1fc635069c09563be. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/US83Z2230780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b20b040b0631876f1b7aabfe01b8bab26002b9c45828e21b9fe62e202c984b3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US83Z2230785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76585a7b7824a11debe568421426519ef217fa7e63edc43cc044be7dd27d55f2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US83Z2234563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610c98b94ddd1c61b24a2c77711ff5325d229400f08a72f6adbaad60f54fe4fd. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/RUB422300908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c06c49de9ddea827c29fa4fa1c1fe6c3c012bff38d5c4f32134dae8ff2fd4b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/US83Z2351520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1106a44cccb00a344197b3714087ae86ebc3019d580bed97b084de5265d60d4f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DGA0P2333664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5892bae240260815a890ea7da976a53ad2467ea54f2405145d7a8cb30ead9b. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/FR96X2417936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9238a31a91c90355149915ffb8b35e5205d508280e002f4a8ff74ef6e8edbea. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA0L2473846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63042b310117f14fc02b6839fbf1448c8a7c8c422ab87c9a4b8b9f95e219041f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DGA0S2419680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54a75ca6f11f88b811335098844967073184984124001a37e94295db19a70b3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUB422500353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4937643232299c18639ac7a442c8c704ce337c0f8188d1393a8a9905056a214d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/RUAGT2568785.