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 0xb0ec72aad7a324cd7c30af79462101bf00aeba93f50894f48495635f3514d6d3. 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/db347bd5-889b-45c0-80e5-7d9723d3207d.json and https://artists.proofprofile.net/proofs/artist/db347bd5-889b-45c0-80e5-7d9723d3207d.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 0x76655ad0c7a67d9ca291f2e7c89a15ca2a6ca0f56c91a1ccfa45e418537f6bb3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:07:10Z), 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/QZES72454366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107480cb5671e3cdeb8278c001c563ce86974cab83f42afb0ef8b11b61c3556c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN72461169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f837234176c1be95ae252dadb27842fa692e59e48fa214b24f422c23bf1a144. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:44Z), 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/QZHNA2432021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702513933c55fc218c239b662ad49b37797838c516649432c27e5600feec118b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZMEM2487135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0440ddcfd94258a207715562a05ac582b8209622e6cb25f6cb6f4c07da7f9a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWQ2490684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ba70ed85cead37d457e7f4cc5afc061734292e683d7d4b6ba919ba7f2d9a55. 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/QZNWQ2490690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2e1621542b501b06124e91da5af8a5ee0fb1ede1d8166302261695a6c72a34. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWQ2490691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2ada3613006d1f72be873c031702ac3c1e9aac8ccbc4d466eb71756afc2c0d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:56:49Z), 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/QZTAX2443430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd962f713be463c8d20dd9b829ceff8f0b374367e30e66d4186e95abf9fe9078. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZWFJ2447575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a916996ab4532392a98523b85500895b78a4acf22d9325ab117cbce4f0f077. 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/QZWFU2415584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9584b64a091e1e021665620ed1ab043e47b3bc04b58976709847b15afcb568. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7K2495604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacff370852834beb275e8089bdea9f8b5f7f407beae41ffa0e7d33521dc68bc3. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:01:28Z), 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/QT3EY2483231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072e1181cd8430ef23ae1da2cba7d3014c6d54241641ccf1dd8c0d2006748890. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZES92566028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a8a9e09b332ae7faa9962878cb8d09bb0df3f3ced6ac48de0725ddcf616ae1. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZHN82516594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24fe154f54bfe6e79c3c969c94c5616c1bc0746c682b62f65f8b3b28da2bb44. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZK6Q2535912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9004390b6d93c30528db73b87e0c06d1bd9209bd27abf91b156d19db082573. 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/QZWFJ2508046.