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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c79316600d28284b4ce376bddc5126f117adc18f6bf64e239360bd67e48459. 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/6adae13f-bfc4-4e57-93c4-49991569cac3.json and https://artists.proofprofile.net/proofs/artist/6adae13f-bfc4-4e57-93c4-49991569cac3.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc6d7bd6f8b6e4ef7e9e79107cd6731f083cf7f09a35095297c25bda155a7ad. 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/QZMHL2309252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01207658df8d088cf93a66a2ee01726484fcafd17da22da18be2f1f13f7ef98. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZMHN2328574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b0cdb1c7e510f964555ff38882c2599ca9baa95089580528924c21e026d11b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZS642279889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b770fb44d1351525f8d6714370625de75ed531494aebfa48e61957beaa029d3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA62449354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155ea6f4fb5e967d5bcd19f61da05ad5bb7318afd1b80861e285a4ba489001bd. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZDA62449357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509f800fd4fe1cc0e61fed69f4987d069ed3652b24c575e590160d7407a7a5cd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA62449360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15e1ebfaa765f9bb0c664c5176983ed53572c9f1989e809255d90d8f52c4084. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZMER2489377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c898e85b83c296b28e3d86efa428fa648f61d23ef5718039c01f6434644e20. 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/QZMER2489379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397fddfe8c0649acfe54516141ad74cd78318f75dfa0674697ede70bf767797e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMER2489381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ce4a3fefcf1548a3bb57020019ccb0178fb7848168e63c34eebec06f580966. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZWFH2459440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb456db15a8c111a231cf7bea04efa9586ac013033268f371e2567f8ad8426cb1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZZ782417813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0e1d872403bade3d29ef2a6b09feca04e672ed4dde7eeb5b46cd772d48c171. 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/QZZ782417818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ce4a3fefcf1548a3bb57020019ccb0178fb7848168e63c34eebec06f580966. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZWFH2459440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2807348fa93d0f197999e1c5b7eb283b7303190638d7d47a14dfa2c0ae5e3b03. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA52527373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1ce3375da4c15c475ab0529fd7e060b05dbfca6533379f619fdd1b28cda945. 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/QZPEW2580602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc12d99bbf28b9ab01cd9699d3f13fe35fce2402eb737d5b147829d179701b2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZK6Q2530121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71afef369263f375bc4117d8f2318214a40e0ee02da85d519035a78525e05d6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZPLR2554363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b910ce7515371bd0c294940f27431d82162e538a9a6f87e0990c33026885e2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZTAT2575935.