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 0x22ccb725671b453bade017a4c0d289f0bcdaac95d6a7acad3cd85aa2ebe718db. 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/6497f422-ba47-402c-b0e6-acb5ac7b567a.json and https://artists.proofprofile.net/proofs/artist/6497f422-ba47-402c-b0e6-acb5ac7b567a.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 0x19912f97e6404a30ced93ffaaa1696f0a276a060d9ecdc5ed2a54fe02d48624d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZGWW2005036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b678c56dcd102fd847035e98692e583461749ef75ad358dcf1e09c7725bdcc. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZGWW2064060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f2caa6ee9429d5880a928f971243e7576f55dc86d922944ca920f1f8b7803f. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZGWX2054722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c2b57ea5cc75a60125f7fe1b2aff11bc6d9d74bd5071c48ea7a3e0a69a2fce. 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/AUKDT2300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93382c6bfbb00311a25297fa576967fb606cd070c49394d43eb03e32e7acedf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AUKDT2300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef02da64d6275776afe7ad1e480446dcc7fab15f75d8162e78e51ab9505e94bf. 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/AUKDT2300702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f65a7b14a92382fb4568f3fa6599a3ced260ad3b98a2d9acac03981bdd367c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/AUKDT2300367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456373b9e97cd3546802d134d4a31e0648f9a95f0a3fa976860a48b3afa6a0d3. 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/AUKDT2300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8276dd5f31adb7b542f0cdfa8c47eb21fce9a3b747c42088f3ed9a322aed4c6e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/AUKDT2400658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cf032d7460c35d0014d9a7a8b68462158d54eb52e621033d500035485bfb1a. 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/AUKDT2400724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa077f37d86f719ac34c780299a7625b5af06c3f8d09fe049b6f53085b48fb008. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US3DF2467509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aec7f29918bf0db00e9833c189b17e21d8d3942c4169377b7869ec3b241998. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/AUKDT2400774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59db10952963df10afdb954598278a37c46023861eac27bb1d7b3f8a01a82881. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/US3DF2468171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eefde57477e0781f7f544fd01fe478013a1d0e8e9754e1652e56c2359bc87ca. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US3DF2468172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f5840a43bbbd814736aed630667d8c1078b2bdb7b5b9fa5cc588fca97a8918. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/AUKDT2400244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde18bda956e2e717a0a5e40d3053c67f28f13bc74f5152b4aeff531a89954531. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/AUKDT2400925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf89178bd18756b83c95d9e696a9314449bf478055b4057795f561dae5f8a8d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/US3DF2468173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948b410ffcce080486ed94f5a184bdbc33176e286a67b5558eacc0c22b8fdbce. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/AUKDT2401217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e596a5f2a9bc64ac75eb6f89f72ac20908af50c2e27be461df5164d44cdeb0. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USANG2481017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe515e3d13a00432108ff34fced4de0fe00c8b04fdb398f7645e3c9db8302421. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUKDT2401876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dcc87f02d4fc670bd213cabb708bc030a77c614963e16e7b0cb20b9c9e3a6b. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USANG2481018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426eb62e9ddf6be52a4b0b390e332d56d979f889ec8b1533afccac64df3088ed. 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/USANG2481019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf5105b749d089bb461f192c89c4101b5877c78122f205bc135c375702baafe. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3DF2551347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992e79ba0c16b74ad3ae6867070165fa8ec8b41ea90b792b25f6d9b722622b9b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QT4K42564425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70791097b8ea9fa221caa8d38e9cc796d66489f7c4accc8a90fc9a3f764c2e2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUKDT2300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456373b9e97cd3546802d134d4a31e0648f9a95f0a3fa976860a48b3afa6a0d3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUKDT2300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70791097b8ea9fa221caa8d38e9cc796d66489f7c4accc8a90fc9a3f764c2e2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUKDT2300115.