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 0x1b8b10b9b6fa370da3a6b109b1d3e42948e3813ee540807e1a61c59efbddd8e3. 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/98dc9ab3-c140-4ed3-ad28-ce955b65ed1a.json and https://artists.proofprofile.net/proofs/artist/98dc9ab3-c140-4ed3-ad28-ce955b65ed1a.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 0x399907f0933f5682d207f90314f8a72643e2b3a272996f8bfb8c992dc6f12aa7. 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/GBKQU2453204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d8643ccd5c38ea90fa6803e422912a7329003757af617037fd7450d1b85135. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBKQU2453213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9608f85da08e1c1b13b4af53c09e684634fefb16078088c7adb43fd4e25a9a. 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/GBKQU2453216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bcfb7ee644cae900216d5527d9bea4a0f85d53f13fca8e675cddea15d2f46e. 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/GBEWA2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785de04b1e3b2a491890b7f4ae614cdd45a7fb468b1c10db86a6ba1b6f6c2c9b. 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/GBEWA2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb15ce47dab5450b5a635471cdc1d9113c724dee344f3d551be9dcacb5dd0943. 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/US4HB2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86bd48a44ab0b8306644bf382038267cefce77808a326ff01c7b4cd4b31aa55. 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/US4HB2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfeb60daef82e1fdf8931c65140f2784e36003e9eb9eff8d22374d39fdb3f4bc. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/US4HB2200613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51316de53fd1cc99e3c7141f9793eccfcaabb357f7289937db236e3d1ef160dc. 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/US4HB2200589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd36151f45ab2e7d254e40b2f56a89d21a1c2bda93cd72c034739360f4b8ef2c. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:45:34Z), 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/US4HB2200530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fbd31e678ff4093276c8dc8b43c1ae7580cd05da674ab4e1b004664e39bb8d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US4HB2200452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c63d4bb329eaa9ed5aec963d1be500f33d46e9e4c2b253309804a48ae90c9a3. 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/US4HB2100293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37fc4ec3d47abb814c5d1b36af512f4fa3e5c003abc092a1466ec014b8daa1c. 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/GBEWA2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec2ac558ecb024188d7cf2e223c7893428dbc16cc20970661f202ddc72d3e74. 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/GBEWA2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8ec70930a074e1ed812536623c18f21a4762d80e79c593e418d085f4a15489. 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/GBEWA2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f42a105df9206b222bf010c1cbd222337def2a0b3df958abeffbb4ed10e69a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBEWA2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e89e8013fd86884eef5e9fce1ca40947436f8a8c7fbcb587992c8b0ac6e1520. 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/GBEWA2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b23fd0fa99726211d407a24d164226cd2e3b2a3e6f50a2d189349f7d55e3a1. 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/GBEWA2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbb4cd8e042573483cb1ae167b98d51fb28544c252fbddbd5d98a2cf6f53d5f. 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/GBEWA2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ccdba848e15de7d5bf2ec7201778dc1dfb61a671ae181f2d522625bdc9a277. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBEWA2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785de04b1e3b2a491890b7f4ae614cdd45a7fb468b1c10db86a6ba1b6f6c2c9b. 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/GBEWA2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d662c7fe63fa259d90cc3f2a5f2e4451d61f4622ebb5fc49ae8658ece8d168c. 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/QM24S2307355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1554aa933fa7c9a8375a61d221f37941d460860d9b5a8f0eb5eea5cbe44e9ceb. 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/QM24S2306076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6590c1678f891d56e4944dfea9fae6827662c7266e2b1df7f6384ce05d2a2b. 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/QM24S2306862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd4d3d31aab51a8bee58934eccc3e1404689dadbfd155a1961d698921924aa8. 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/QM24S2307354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1881a2f2a4d036f8672bfa39714062075af3279f9bd14f0ef3b3aecf9209fb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US4HB2200600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504f440e9fe8da306a841d1efbf8ec0c6a2e88927fc97099b61693559d3f7600. 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/US4HB2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013ed0b770179f7f64270a2153e021d092988ad477cfb890b2a71b24527f1cca. 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/QM24S2307353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c42dec341b4fe9d957f0dc12e1876299c20aaff8c9f9709ae8bf4eaec973ea2. 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/QM24S2307352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e58e417e86f4e5871fbbeb6b566debfa5507935021063df56c98f703444992. 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/QM24S2307351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b46db723c0548587d9904fb043e77b33395422ea478e3a5192261da641d74b8. 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/QM24S2307350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb695b0b0de5ca9458878a73ae5f2e85ce137ee8d458da93fd96313216188eae. 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/QM24S2307349.