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 0xb8c501ac74a87aef57c5cace335bdc436ec8d7c4f0b8dcf9478f6933fb890191. 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/ccfc759e-d030-455f-8131-57988717e36b.json and https://artists.proofprofile.net/proofs/artist/ccfc759e-d030-455f-8131-57988717e36b.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 0x4441964e174f258ede42b1ef38314ebad6df326285105860ea84a5acb256c34f. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZGLS1934619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6926fed0eb46cd1c60223035d2882138fe079baf5b7b7ff2bca4cf03cfc3d106. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:04Z), 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/QZGLM1973320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93df607ea979d590080d8d71a634ab087ea9138d58f7f3d1ccfdef987555bbe8. 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/QZHZ41921232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f88417a9c89197bcfb77d20e3aa8c9883b680d8c20ea05e4e9ae4822ad7ef2b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHZ41921233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fa0743aedf911d6b28ee51bdd2aa71d9403536436a14b0ad5ff226011cfeda. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:00:14Z), 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/QZHZ41921234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f07056dae48ba876f607e8cca980249b74b869049912b343110faab262940c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:07:42Z), 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/QZHZ41921235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496a6820e13d44f00652529bf85d9d95208c59756f01ee3f2b247e93cb04ab6c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZHZ41921236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95b343ca4745bd96879f6a2577684558dd76775c45fc8aefa0bf942a3ce6eb0. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHZ31907231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcc8049aab65d6400d5cdf5f5d977998cded6529b259045db4a2134ce01d662. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/BXKLS2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2321e455536db84b4272ec7c7ff575840dcd9852caa7136ca89f6fd592e57498. 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/BXKLS2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2045c50cb9a58b8349b0df69b058e603022f172d8d29fec4842aac57ea814e. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:51:59Z), 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/QZHZ42207539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ffa586b3da8928ccd991ec7899fe3d725d28b55523fc48cf9a673c68c7c88e. 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/QZTVM2365718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c2968b334cf1e8e45b26c917f08932c5bcbf7f17d30e8f89c6ecd4403c9e1a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTVM2366230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d72abaacbc700df0663feaa102f9fc4a433047caf4ab73396fbdfbb080ba0ba. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:00:30Z), 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/QZW9L2399202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b9820ec2abeaa0e2f89bf918057a28ea81b49f9e349fbee70393f4b4bbc0bb. 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/QZW9L2399209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0915dc30d374a3836449b10984e9ad11b95ec798d9a9cdc823c3fe13a6506e. 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/QZW9L2399459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b5cb95a42b12c1b149d5dd026d4f73f2725488be79716f8368c2104617d64d. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZW9L2399461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1049069e7fdad7003864a110f89b764db59c979efc6281eb4806d9d2f774287. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZW9L2399462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a944222520ae95dd9a126e23689891acc060f6cd0c5ebb3fc062bcb00336457. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:30:58Z), 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/QZW9M2304029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa74356bccad967c17d7c678e1ebacd65708e5a3ff3f1c57c2630ba05448be7. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/US7VG2418888.