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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2228ea1ee4d480a70b68aabbf652f55a22cd04f1762c618022e143b855972d. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06621cfe-88d8-455a-bb70-e5624d4ab0bc.json and https://artists.proofprofile.net/proofs/artist/06621cfe-88d8-455a-bb70-e5624d4ab0bc.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ae06bca08a757df927753c79526afd24a5e9484cdcac1ed885ca4cd5e66869. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEZC62157567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbfc6ab809d9ce25bdf79d8954e8e8d72790ea07ccc4028c235248cf0746bb6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNWT2187265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82bc1d0a5be0663f1d0e74669721a53858e263c89e8e1ed49e2324a4053a39b. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZFZ42299108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285443bfbbcdae54c8e15c61730fa1c0080c59ec0ebf84299c53e1938cea185e. 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/QZHNC2248242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcedf4a320cd4d86f9bbc2e7ae22c1b163080994984f04d964c93399265819f. 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/QZMER2285244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef18862e23085e7fc0e08aa0581bd315f226d9a9cb0ea6e5db838c5797195d8. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZRP42295731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe488d5230f73f6c3c38b4ba554ee7064b2a5a2f77974dfdb2e87c496361b8dd2. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTAU2282522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa358bc994299594cbdab2de005a6552b2cad52980de938c77c2bea19d29b9303. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZFZ22342948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a11364601003d9f875fcbb6e69ce33b871788c07a9a880ad93dfb3db7c35689. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/DEZC62338046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba17900528ee24362de53429deb7571b3ff49448c2a57368425ce44dc6704a0. 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/QZNWW2362176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2486c30f4d26878466520e1b84a928c0bf49c3dd8da02129422f4d0cad7a1249. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZFYZ2473323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a7d15d383264ab6abccb0db09b4474b8cfb39da92bd6983df86a44e794de42. 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/QZDA82449277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47152a54629e8bc758375b16f31f84230586b4bc10bd4e87d3db133954491f7. 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/QZRP52456878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56e346d6fb0a6807534e736877869bc51b30aed5dc4d32e576330096bd29069. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/DEZC62573734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b17a809a6df40514c051b42a90b3aa69ecbd5c39bed312e14a05deec6e946d9. 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/QZHN62573619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b17a809a6df40514c051b42a90b3aa69ecbd5c39bed312e14a05deec6e946d9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN62573619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79239efd2317686e217c139a067b8cb7ee4f9e2cad10099abbfe4cde96a6e522. 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/QZK6L2515312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea43719cbf5b43a2ac2c8263a474260bfb76f4ee58eacd7f575b6efe618fdab. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZK6L2515313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58351c1384239c98f9d1f0ea9f7cef4558500be88bbf3129441c38aa3720666b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZK6L2515314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9554a84a45097c6da1f95d82a9a5cbde3367c847118e521a1ca3b1dda371216. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6L2515315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852fd4c6742cf2a25d756d4987f7a3726a4e4b04fc0e9241afa8885118161de8. 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/QZK6L2515316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd370e38b7c27b74bf54bf265fbeb08979d8d91e43f8bd5f42b05d7e6ce0c8b1. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZK6L2515317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f25e3efde05d6c145a5c8594788352a34043e8740e7845094ff8827b77e497. 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/QZK6L2515318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47152a54629e8bc758375b16f31f84230586b4bc10bd4e87d3db133954491f7. 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/QZRP52456878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83263cecbe0b4350ae0bd05adb0159926d204045999cf4b83a86aa68a623927. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZK6L2515319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba0c71de3c503b82c9dfc816aea6ca6b8b3d58f5e4d046d425d7fc34ea23e42. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZK6L2515320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b999f90554017f01727a270fe516d47fa7bb3f847ce988bb1df30d6973a9cc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6L2515321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29987679774c622da41b579417a4f6dc47e1537c6e3b9322a21cd69a1ab177a8. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTB32560463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e37fa4d0d66c92d3bdfbd80e16e4e2da6215bbec3184dc7284a4f9919d96bb. Chain 2 (Bitcoin): anchored in block 957791 (2026-07-13T02:46:19Z), 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/QZZ782535051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0ab13f52609c1b810183391d2094719b6b7d382d8434dcfdb0cd8bd0b23377. 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/QZZ7T2579337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d03937e4546e16123236ee03c4e34192a11be10203172a99d00a4df43e7fb1. 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/QT6EE2586941.