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 0x564ddf5a8c2455bcb85047966a3772776a6d31ecd3d49137abead243e86e05bd. 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/e33240b0-fdd1-47e8-9f45-8e818c8a6d9b.json and https://artists.proofprofile.net/proofs/artist/e33240b0-fdd1-47e8-9f45-8e818c8a6d9b.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 0x91fd86f262bf6f6b4cc571a4327a9e61445da8cf81c19000786930ca002b7406. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/SEYOK1646554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa48fbdc53248f8a59426ea12b2f1e2d669cbd39e78be4c811f5d4015611d14. 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/QZ5FN1778049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fd86f262bf6f6b4cc571a4327a9e61445da8cf81c19000786930ca002b7406. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SEYOK1646554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ecb29dcdb949bf4aa5c110958108c8695e1e85983618b10be67c8b6328dbd5. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZ5FN1778052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385825ea74e61096eb903ef63eed56dc2cb649c46c362fb022e1400f2215dcbf. 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/QZ5FN1778057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e24c5ecfdfd381967237772ff9c6681fc09e053595311f45daf8ec58e56baa. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/GBWUL2026583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa174281fa69aee63f55d03fb8f206b819da2f098ceae1eb3e2995844e6f270c0. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/GBWUL2026591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5401ce8cf75b64eb357bdcaaf315cab848d95e4bfe64abcd343c83a5c6a7f96c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBWUL2026599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2e71fef61a0d61e121aaa478224351102c184d732c549dc708e7199e7375d8. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:14:47Z), 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/QZHN52140041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd8b6a9261c528e8113e8bf373cef0d4ab4b37174d5b266c8cc109a9e686094. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHN52140042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc946296965e20200cc63f2549f0b1c3ac06c5887853c1ecd5370bb2d2f2be49e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN52140043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d78836ca3b542088faa8632beed5bf5685e3c458bc49195d00d4c9cd2f3a28. 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/QZHN52140044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67982925fecd5d12399f6f52b62981b36d0379d8fd95a2a77e3c9defe63d5f58. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZHN92101993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a40281f04b0fba1b735c1976e73a475ce5bbf4f64f7002508ca78c7a16d9c27. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:43:29Z), 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/QZHN52140047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1840269399a6d07399d53048150cb6c0842c053826f3e7dbf07026b1d377f1. 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/QZHN52140048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa828e951470b3bb871fc3719ee1b31fb1ea0773a420f8fe89615dc778ec64fc1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ62313585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f80807b813f5d7f2a77516cf81476bcf945479263f7694544ab3a96d6c36741. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZMEQ2465794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068d5a4385c17ea997144716102f5d9c096ac3ecf87bbaed290ea878fb13b134. 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/QZWFL2429869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa97ca73da53bf855002c5940380cc828229acdb524b865f9810871deea3610. 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/QZWFL2429870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae03ddfbd389e1f3c7c46e8e20e6b6d6c0c722aa03f1f834965020f3b38dab6d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFL2429871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea93323c17b78784eabd3c0a135d0f4a8eaadb0d746f5b0309b5079161661c9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHZ42108948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe851dfbb4562f8f6740bd2a8290928714e7867e6e367f4dc7bf6df0aed052d2c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBWUL2498852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7fdb4611054bad305770e7af2e61efbc69b6f08d187ad3d31bae08f495d5c2. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QMBZ92447967.
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