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 0xab25c57f3b5370d10698ef041b73d693710e2136c8f8f31c9d3dc0a91431f7a9. 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/78b9176a-8c1c-4734-b873-401961cfb0ab.json and https://artists.proofprofile.net/proofs/artist/78b9176a-8c1c-4734-b873-401961cfb0ab.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 0x516cb32b2a3df4f132cd910f8992cf94c4567ee90378fd1ad10c525ad0c49544. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2150061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24bc7957fd27cadd2244e6b05693a454d5bc2c0fdac140818821f7952ebe4f6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2150062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717b793c799dcda3de26fd06097e034fe636c0786774bdd7baa06f1e9c831b97. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZAKB2366993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70e43a5418e796ee5c29117f730ee5a8ca7fdeadd48e208817fa5a672c38c1f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZAKB2341759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b127c5fe3fe76e458272e06682fd974601ec0f7e9b9df12a8e1109c168face. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZAKB2341760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe61566cb180f069035f95cf28cc5526138ea2511434b51148a16af7e7ac77c9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZAKB2290326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe983fc6b9a030bef5400d8e29eb81737730505d87aa5673dbc389fea97b8f284. 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/QZAKB2290327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7500b72f56ebeaf01606989e51fe73f0b27baa52c389ea45409e61d14cce33b1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZAKB2290328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3364ebfb5f7a4d42854d76f298227db62ca1e465d722434d912c72aaba01eb59. 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/QZAKB2165498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab56e023b8c4553dec2b68e2954c23cdd61a61527bf5f40e80cff51aeefdcb4d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2165499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2adfe9585fb2925300b21c40df67a9a74908a033f7d9513e7c72d847ad5614. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZAKB2102959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc45efcf1ec8bbba727e1fe04988db4e7267927d1e8766c122281db52016b03. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2102960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdd163ab18ec42b2d9e7e119a69e986e31db63007b618b4a8d266de83bda567. 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/QZAKB2102961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264eed746f45c036fc39c580ca7caeb6dcfe7b6ffa9d7e2df3dd82b80f6e34ff. 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/QZAKB2102962.