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 0x50ad7869c00e6688e13b443b9bb9abe3f6e4a8fb15ede0805036c496029a9c27. 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/3d5195ec-9362-451f-a63d-aacb351f5b22.json and https://artists.proofprofile.net/proofs/artist/3d5195ec-9362-451f-a63d-aacb351f5b22.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 0x50cd2aefa901a118128c481dd67445796ffb6a918a14b8603ca2d7cf4b38bb67. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZ5AB1644913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f07862741177402967e3eff2c8bfab20ca7412e47035a724c29b295166c37f5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZ5AB1644918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06712e36a454f47f9597712d36ede2626cdd46cddc61e9df0d7230edf87db14f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ5AB1644920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93557dc94f54471a48a0408b154f1a7d254f3e160a8278a5780a6a123d61e683. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/US7VG1591408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9650debad473c9d1c196f066d739fb6511fa1142244f8932d9ede17d17dc10ad. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:06:05Z), 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/BXINV2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137e5cd2df6a5f88bbdf7726d55adca40d936e7695a829b8e1e1b043e8ecc72e. 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/BXINV2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ce7971dd3762e1c2036f2bb035abd0f2a2b4ae5c59d24036a242ad551e0803. 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/BXINV2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a030e8fed1d55aefb95460780cbefb6f3f27df520a923a39a360d6fa6d9b6a1. 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/BXINV2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b032051bca0573e8f86273ecf3bc88d8db895381db2de2b62945879185f9c3c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BXINV2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab779e067bebd0e514d2fcab21357fb7116ccab0946c61254901e0bf1b3d875. 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/BXINV2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7204a5b99ed364f41dd96a20bb06d2d5eb38d4b7dee6f9b4630454d56e8610. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:54:40Z), 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/BXINV2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a030e8fed1d55aefb95460780cbefb6f3f27df520a923a39a360d6fa6d9b6a1. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/BXINV2400020.