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 0x4f215b1b04450c4c57c0a6222bbbbb898368294730f6daf1c0ca810524448a22. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21a2b3c5-c9a7-4aeb-9f58-ba6c3063112e.json and https://artists.proofprofile.net/proofs/artist/21a2b3c5-c9a7-4aeb-9f58-ba6c3063112e.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 0x32b4d2ff98240f9b72081ce6f7ba82507be08c59f85cd2ed625ac4378c17c464. 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/INT501804473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee995d4e5a95e515eb76532ae0874897c3252dbc250b09535175373209c3568. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/INT501805556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13363618d2075e0e3a8ad178b324ba7c5d5a4ba6d6a6d423477dca8fa111c024. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/INS232016498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fa37ecc3853a1590fa6f00ac9c3b0ec543f574426bf60f64d6e5487249238b. 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/INS182200985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb257ae735408d41b7a4be177f7f62eef937cc5dee78d3aaec28a98d03091135f. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/INS7A2466249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5e8b2262413bdfa3dcdea4b5e0bd0ef095bc811b646247f509cb08b6d94d8c. 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/INY242304420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a77461806b8e6fb8315e8236dc9c7afa60c75fbfde7cdb06aff562eb540e38. 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/INGC12403592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e376ba98e1e064c67faedff5162488cafb91c0457b7b8e27a57eff46ed52e1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/INT132400264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bb789c24f35583e8d8d8d05084a3d5986c042a6d7cde4b97c52654021a72b4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:19:55Z), 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/FRX872463739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed706fc20da6807491d682b12fc9b4e10f6a7baed9ae7824a758cac61901f220. 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/INT132400647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c8cf3722e39d9d44e7ea4f331d35c257c656b169e4814e720a7dc0743e168e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ESA012513113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95470acc245c79ac91f1fb0b6dd224470b7a503e26a4fa9896041d7f66e77b9. 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/FRX202582566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56955e2fb479d8d023d458aa902df4cf21a8b56f4fbba538e08fae9ca1560582. 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/FRX202582578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d962045cb3bf25f8106181a1c3e9e47d634869c2ea755fd5f178658f833443. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:46:12Z), 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/FRX202582579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2a1cf1bc405080a1beb7b9d6c01cbcfa340ab8c71aa362fb368ac63fe9b728. 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/INT132500322.