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 0xec08cc46fc4da6564af67d991dc235ee8a2d53fea2e232c19ec45773875588e8. 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/46d0bbff-110a-4abc-8e99-4e021925e5f9.json and https://artists.proofprofile.net/proofs/artist/46d0bbff-110a-4abc-8e99-4e021925e5f9.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 0x985109d34ff05031a9bbc0a28cd0a56d9cf484b045567e8212eb4ece0cd9e995. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/UKMS21700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693d046624d3b34ce102af218f34c94034a63e054eb7cfc042d0fd90bfb34601. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/UKMS21700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62637c4193b52686602be91e0535c0ed7d75ce4e3578a73d846397203c1bfef5. 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/GBFFM1915382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38e4787b619804acf20ea4e0cfa0a497892c8644dccb56017dcab5c55647b88. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBFFM1915379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dd8af321bf65c5a835c50bf691c3474e96b97d89569b40e8c8704add4cca23. 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/UKMS21700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8811558d1ea61d50150a6d83c4a327a072433d8eb7539bb78cfca4432a56dd. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/UKMS21700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fbc63c94dbead98eea258bc55f134f79a0774b43a84cbd18cd24f7208b8828. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/UKMS21700058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed569addc7828d531b57ed084a4825b956c4408fe03a098f5fb1ad24c8c478ac. 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/UKMS21700063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760c3850a34a26ba5691de45eb35ddda0d2436e6466318dad2f48b8d8b802ae1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKMS21700066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064bcd753e200d1386e33c3d730997910f0b50c2a6a8497dc7ba1c4421fff719. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QMFMG2345170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd849df9309c2be82eecac4c6ead958f9ef90db23aae26b61a751d497bd315eb2. 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/UKMS21700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b3b8e7e8e96080c47397dc0debb464e89727a0f059778f3fc588e5f6af69d4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKMS21700065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd849df9309c2be82eecac4c6ead958f9ef90db23aae26b61a751d497bd315eb2. 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/UKMS21700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760c3850a34a26ba5691de45eb35ddda0d2436e6466318dad2f48b8d8b802ae1. 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/UKMS21700066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d741ab4f0466e08b9bf1616a0114767f9ba245326be5e69ba005ec51cf306b. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/UKMS21700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2abe1626010cc798019166539bc3389ae68ca93f19078e51a763dd5b50ecb7. 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/UKMS21700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829b0b28cfdae93c46fd6c1c0f2c3daa9011769fe4d21167f9d50dc00f929bb1. 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/UKMS21700075.