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 0x9a74876235410fa5f3edc51365918475630d9f742bf52970b06c06f4eeed646b. 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/67be4a77-a805-4622-a1a2-338f16347683.json and https://artists.proofprofile.net/proofs/artist/67be4a77-a805-4622-a1a2-338f16347683.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 0x567d64855f34544fc2d02c14172cb96d1e4a67973e246e159f602d7ffb3b581c. 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/GB2GX2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c635eac087f2058c4e4eff5bbeaafddd7e0bbdb3629f32eb12cc286ef8a4b3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GB2GX2100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607fc034ec363b40b1ccd00936f8db602631abce7f600bd4f0ef338fa4e3ff93. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GB2GX2100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e517997250316bb6ff58bf0e6494b5fe6a35507f43fa315c8a260ef75b5e97. 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/GB2GX2100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd281ad5292fa5dd3c2095c26586a6d73ba50af5010b4e74465784cdab961288f. 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/GB2GX2100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde51b36eca3ad3239a7bc59dd1a6976308d66e86b9c45d0c47dae88cf16c630. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:51:01Z), 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/GBUM72202837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08237237aa5d99b0d716ed04ae0090ced063b8d8b77c5ff7357000139a98071. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USZXT2250395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0176018b44e6fd86540c17de9ebc4502079ebac1fe2c6ee3aac74f46e7f5d0b. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:24:09Z), 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/USZXT2250420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71f478d236bddf104a3be4ba3595a7e93fbcc611044ba43cac208b7c1631eb5. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USZXT2250421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc919e6b5a33bbb25c879cbf5491a90cb5a09f3dfa1628c885d9038f0208994f. 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/QZW9L2468865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d39dace552e02df4356ba703f90a0450ae674324b8a9c947ed59e89a7d178d. 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/QZNJV2579420.