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 0x65f97b06a4bb8fd671c7ca6d6a8f60b5c870ff6cb9f5ea79d35c1960c42639bd. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c098b4a2-9cec-416a-9c36-e1c0bf4e51a3.json and https://artists.proofprofile.net/proofs/artist/c098b4a2-9cec-416a-9c36-e1c0bf4e51a3.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 0x02d31bc31bad300d9e21c82265452c5ed2b48c9db96355e7abfa9f81e18b05bc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US2Y70807001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee4342ba066e326f01c252b44a7a14cbe0a9006b5d6c81235b9d748dc8d75a2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US2Y70807005.
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 0x8f41043289919054b5a80965b0022fba93317833669c195b42bef71c48879c2d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTLA2437167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a472ff9201d568f192f531a3d8ff6a0abfb0d8608ffc10aa8dbf6d20cbea44. 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/QZTLA2437888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cdb78568d5ae178ed411e44fa71c76688e68f5e05d04bc56fdebb2bdabbb96. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTLA2409127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaae1bfab68127686ed0f6545fe00437bccc1cdffd3899dee681f784ebe5cf1e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTLA2488110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90e5147bc86842f49369071b686a1cf3bdeb0b0921ecfb1aa55b075e12cec93. 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/QZTLA2488454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cec4e3f5732f7dd7961aa53ee1bddb532a19f04da02a5986cccd356bc5850f7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTLA2458004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f40cf509f7c36f00288198fd6f3a34311e1a73e3f89d8a08bccc14ee241d17d. 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/QZTLA2443073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee052ecadb57370dc73f991673586758cc52bd14a6790477deb9a4053e292c05. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:46:24Z), 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/QZTLA2411885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdbe9f28c538b2b2b0357815053b85173fc523982cd1ededf58e835e6023a07. 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/QZTLA2475954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e1619b5dcb3e3fae9aa5e02c7e3ebee6a2db71ea24a633b258e0498b7d4e6f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTLA2413529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e11709300e13d6d5539a1333fa99d6f868722a891f77dd67f4879059742102. 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/QZTLA2404806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdced57699fc0cf093ad31503a7efd8a4308bd5751d0e3d2ff67e763242e1dc18. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTLA2416526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c42e703f272b1b898639a5b81382faaddf91b048b58a895e6565fe589c7d3ca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTLA2483631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7727530b3d60d3123f1e87e6ae4dbab1af733ccb88a1a979e1769f432e4a66df. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTLA2489713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6f01ad1224df11825a1769ce44f40b4ed8c7a05d94f8fa576eaa93113e6efc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZS7J2495461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b49252bbb33423e4c71f3c3429593bd202ed886ae86c4af8650b487f046ef3. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZTLA2435194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ccfadf05a115bbc118836e7c64e6797e1bd9e23679e67cd97ac6a146eacaf8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZQAY2471808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0535d16c5f911a138942bb1bae0cfb0bbca266f66687885fe514fba4a1d6626b. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZTLA2402198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864d254b92020bbf090273c7cdd3dc2a4509cd61a5fd856a5b2cff929cc405fd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZTLA2462083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2b253e18aa1e1294582fd91bdec4cfa85c904a8020b0849e8ac325b294af23. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZTLA2485955.