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 0xb30c9d4b45b49b62bcc61ab20000cd78c89717d3447753c91585169cece0628d. 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/8c0fe9a7-8cd4-4117-b6f9-a512ea3a9519.json and https://artists.proofprofile.net/proofs/artist/8c0fe9a7-8cd4-4117-b6f9-a512ea3a9519.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 0x1fe661c98da6df6c97e63a962d49b61a7a4d2f45e2a93db2d7b311060f217bd0. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZMEQ2320737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a109d8739215d9f4a3046c4d1f6e0f124c23edd407069033aa49ddb2fd3df8b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USWB12306900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771cc1044ec9e0b599a1ff3f07a7d833bee7c471a7c9322f0f793464b89394bd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZS7J2367546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e2d1d437782e1eeaef3bc94afb9fd83a5284df84757630d2cc7cde8d6cee48. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZFZ42476909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5abffe990f6d01e44012bed673ca9297f61932c335b6511988b4ee4c78501e. 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/QZK6L2422635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ac36e131b77a8d4a21cde007594daae1fbeb0e36f6f394a360246697113148. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFT2496328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712fde4dd56f502328aadb60e8de5eaee290e418f54d01576974115bb478cbb7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZWFW2434675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a78f002540ded20ef974e1ed58fa6253287b8c1df7a4929eafc3442c7dce48. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:33:41Z), 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/QZZ772406452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e9bc778237b18c415edbf2e979cd96214546ad367d35c533c1a4c22f86afe1. 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/QZZ7M2483180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fd11da0da8f5b441d93c13eb09ba1ce5bf76648db3dff3d09c09841f818fc6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7N2445612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75aad9fe2293f600f8ce44811fc3d1f6305fad24f31813cbe8537a3bb5fecb8. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZZ7N2438528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49fce43328770e4e64c1f0832f919059c122f2f83d6d05ce838f9541a1e4016. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:03:41Z), 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/QZZ7X2405221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbac004e70578e71ac1cbfea967df958b068a88a10c312e0acd589a01228cf27. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7X2405223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de8416ce42814a922413e32d75d8073510997dbc9f7091df23852138bfab42d. 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/QZK6K2582039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847d7647318b825eb673bd5e2531f43874883b03bcd72d087be9821829d815ad. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:09:26Z), 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/QZK6K2589978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b0ae045e47ad60242d1754b947b717b1de9bd538ae27764f848f33e5cef6ac. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6K2589979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017203ad1304a2478c8353552ccab979ab8f5cf6448419e6e7c2dd33cb6d538e. 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/QZTAZ2569630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa203a7351f62aac141a7709836157dcca067b5a1d279104b00c8cac98d33092. 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/QZTAZ2569631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4432e01e835e1b1f769e1c19061d9674714e355be476f38c3a22cfb16c5205b0. 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/QZWFJ2571847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e72f7f005c1728af9f5b51d99c6ba171a4fad650f1dd4e8c6bf2754e7a7108. 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/QZTBF2389699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e45753857b3fb337a1bee998e7e1488b49f93ffaecc0858f3259316edc5aa8. 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/QZTBF2389700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebc513fc9d2fa7264413285a42c2ded4e01bb3bbf95614312e2aa49a2cfb81b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTBF2389701.
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