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 0x8a835b8093d768168bd9047920f0f95c983cfd6bc0349e2fba436cd9220a2d59. 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/b818d3a9-5556-4f26-821e-c75cafbf7d43.json and https://artists.proofprofile.net/proofs/artist/b818d3a9-5556-4f26-821e-c75cafbf7d43.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 0x18e04ebef88c5c4f3ffdba1d8aa9c3764b1bd3eadfae640af73d9095795a5ef2. 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/DELJ81735286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fff2e247dd16e186509685daad31aee013f1461b7bdaee27de7ccb8b9d17d8. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/DELJ81810616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d84a080d50f5bba1ae387a6fddf03d6d3e3859099a180cc2cb3ce4ea452a795. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DELJ81810617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fc764b0520ce96b15072726e059720156380765e798f0cd866336d8fc5e696. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DELJ81812241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cf55e0703f8fb6375a535a7706bbd7b4803fa4ccdc20c6bfb0c76a5b4e612b. 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/DELJ81810619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db8ed4c59696dae780c676389c60168483b205113deb0a2da33f9c8068b012d. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/DELJ81813856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c377d55c5efb9ec27e5c4afa7ce4e62e6b98c7a9b854f76211de2884cf8f32. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:00:52Z), 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/DELJ81924073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff1fd4307ddd0a6e3dedb6716b3b93ea441b4c2c39336148586e34cda3c1715. 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/DELJ82009648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770d070ff33b9ddb09c84d01b27d3ea9e73860a7f97af6058e3635efb44fe61c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DELJ82036401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97be7be01b440b48300647c7c86f1b506f5f02417db41b3a27bb3ed478c63b6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DELJ82035261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1851081b78f1370446efc8eb175a0691c5efc941d3651ed55498b3a9cf88d0c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZC62023937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3ac087d379b4137e7ba65b55f68dc5a7475b7073692bfecdadc0b1ff65072b. 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/DEZC62111461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e56410b8628aafd8b674e30ada3fac301314d6aeeea02240a2dcbb51c0da9d5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/DEZC62258250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ad1cafb45771d6049342416c992ea547d31c71a7d10c30ae5aa4407c4fc17d. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:13:17Z), 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/DEZC62299544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b9140b4bd3073d3d5790f43424d18c3bf8c233f5f5d30a53abacd0d8acf817. 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/DEZC62209993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56387f3de0b302eb7efbd606582548ed7d8f173259775cc21b0a986f8facea33. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZC62336153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e0d23d090fb42dd40632f8aace44741fe052511f2436b87bc5ab993710feae. 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/DEZC62364264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9b71f1e4aea69c26c16e0086942908be15085502bf4934d445d11d01fb6dbc. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEZC62379135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951442803361e18521756da2fe3de2fde0faf01441a95c201df094868a94b390. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEZC62390718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c16d791ac46951e65068b4769719546460ff3b44ac38a5b621acfa869485fa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:58:52Z), 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/DEZC62406221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46450a806996c360ef060929aa1904239216b1b34be4eade6b8e083bf72c0227. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:05:47Z), 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/DEZC62435359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e79071427540e6ed0ce58254c2949102c44014d7816a190fd7217e39a1e5a5. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:01:28Z), 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/DEZC62449338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0376f50410b58ec8866bd922e303c766956de1d18a25ee6935956604a4fcd043. 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/DEZC62450372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5b417a4e0b3e390e1563b07e9a2e978680648e0e7f4dce983ca4d6914c2ebd. 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/DEZC62460908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7eb14cd12d8fdfaa25de66ce360552de665e6980d110779cf4c57cb3c9ccb2. 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/DEZC62467332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ba4c535e513f8e708eac50bab28f5645206f6e4c5eb716ddeba26a8ea79714. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/DEZC62514792.