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 0x88a4770dad1577a7b07e370e9d57d5b363e3c152920ac2d05c5dbde26b3fa870. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73736cee-c9b6-45ff-b7bb-3e0e16226ed4.json and https://artists.proofprofile.net/proofs/artist/73736cee-c9b6-45ff-b7bb-3e0e16226ed4.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 0x4abd4ba8f7c6eafbfae22ef209411633b986c58dfccd00b41a0fa7fb19695ecb. 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/QZNWT2027245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62204d19bd13e8c4fd779527c080d43556ceb2a9b4dc30cef9c631ab7f45015b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZPLS2028704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e49bdc98358d4a6493159fe191b56f215b1a1387fca0f3d4f1dfa344849c0c5. 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/QZES62180606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ed71d500a8acd0f1ea554cf9ed11d831f7d29d6d20cad1b605e557fa08ba76. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:24:12Z), 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/QZK6M2161848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56107ec57427bf448b2ff9a81c2717d9335738b3be42c0489ef4969fed84caf0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6H2158473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbf042c5aea5ca76c1cf3618b68ce1710f08af230146e8ab49d36ccbbdafe82. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWU2156716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9e382ca15834ab991b2fec881876b1a1f7e03644cd1a6e4754ad2dc684db10. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:43:22Z), 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/QZNWZ2169081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc33611b1c6297b504c828b32f8d4f157d7dc9b3080b94e5cd16ee1d19ebe9ba. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:42:51Z), 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/QZDA52239969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e2f63bac07a6b8fcd459e361e3078dbc810bbe2243c5a5ffb5e2f3b013fd02. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZK6J2282256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdcc1f76f4c31f9ab3c80f4d45f79778d621023bb6b967e6cde3b827cc6a5c7. 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/QZNWQ2291688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46bfd2e9abfebd937b1771c8c788bb1e493955709cf1909547004185a049740. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:43:30Z), 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/QZNWT2253627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d505f8732f6c27e28a053b9e2ccf7b61a6b0be14923061d6bcd5139720a67da. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:21:25Z), 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/QZTAY2281925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e2c1674133b32d3f513194ef0c6f4d5bc53d9e8acbee76e5557c22ac36db65. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZMER2371290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18335c6c4545c21a85496c17ee6149c9a5b2956801de79003bbb9d024afab7c. 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/QZFYY2276250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d066473616f14e0f534798b5fa8e8bc57cd5ab11ccb07cd092344d1de9f09e. 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/SE6XW2215853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2550af416b92857ec5074f0dc8a5d03a93966b40060d53af6e4934df675c208. 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/QZJG52177871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0815f225a09b04a5022e7b58c2a8aac6376e25b796e896393d917e3ba85c00f. 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/QZYJT2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11fc72bf6a820593f493e1a4aa8b679667261af7a4736931d0e865143a00c9e. 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/SE6SA2340482.