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 0xea3166df963d14eefbc4823ea53fc56be826b257f99feb15f3e407512eb34449. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb3077ba-f5c0-4dfb-8654-71361956a697.json and https://artists.proofprofile.net/proofs/artist/fb3077ba-f5c0-4dfb-8654-71361956a697.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 0x75e3d3195775a793cf4e93c34eb37633cbe9443d89e1c18be23a4436746b2920. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZDA42417400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9032d0e9f8097f4888640e29a3a0898878bdf685675d19cc3e4cd2d1259af2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ32407627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9032d0e9f8097f4888640e29a3a0898878bdf685675d19cc3e4cd2d1259af2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFZ32407627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58330d83ccfe136eac039c3d17d80307da8a9f29f18255aa49e1de6b0feaef8f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWQ2373946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ffa057ef0fa550698f782061a2a90f1d7b622de5fbe0586ec9cb346a6ed980. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6G2339530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621bfe90abd1dab62fed4e74e5fe9d23c07016e2e2448b9b3c7670ef335a51e0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZS652343677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b1d1211965fe5352e2974f0533fae1c0bd80afd02cae00403880747053f749. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZS662269519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d097434c9e0962d902930ddfed281ff2b2a9e5650bb838267613a7cbbeb50f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZS672286438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a0c0ed217bc3a4795ff9db6cb760e217de5a88a484273772334a5db25df64c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS632252957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa135b2dac0b4fc72c1728ac7ed3d0b4694a61e55c6170e8eb7303292b4205ac5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZS652231022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee4ecb0c305f0f125c8c1875fa0d779d825c47f48bac4ed38179c9887f67ff8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFYX2552620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279c967be7e56b73993d1e7a2fa9ff0b3605d39ccf99fef403a9b3b2dc328add. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZ7U2481060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e7e15e74f4a2ec671e90addd49518f66d0fee703cee44ec9a2b52d6eb312eb. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZZ7M2469658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475ae1c794a01a3dd158b2534fcacd669d9b61b42385116fa900131becfb55fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ7K2482843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf357bb1d4ae3570bf6b545f262d0049f8cc3d3681607509c7f49e8fa675e916f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZ7K2482844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82590026847e202be5ad33528962999239c0aac0097407afa7e1d58b1b098f40. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN92272516.