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 0xad32bd630017ec4cc7b02b6ce03ecbb28a21a063955a0a015feabdbe8fa6d25e. 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/e1361c54-eb11-49d8-9459-4e03a2a9f859.json and https://artists.proofprofile.net/proofs/artist/e1361c54-eb11-49d8-9459-4e03a2a9f859.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 0x8bb70cc5ac645a9e6042dfd862e1dfd6fe2ca534afd7aff3821073e66c503d1a. 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/QZDA72331891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26261d69a164e8b8f11d8528a3c8ba3493976f27fe7cef56d34f0b514f263dae. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:01:16Z), 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/QZNWY2368351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49b2e4acae475dfd43e10263a1083a479cf8ad5e02f0bf59f04c11c11f13fc0. 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/QZTAT2348351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d1529eb8287865ee222faaa8d763b8d218569b93bce01c92f10c626232e0eb. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZWFE2395810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41edc278668c9292561ba7be4c9b620ec359fac307baece574f9316391300d69. 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/QZHN52450408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfc79611c4de0cd04d4b0397d9bb9f712048c1deac4c72ef5e92bdbe5942ba9. 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/QZK6M2461404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae53734d1415a19fd30b1d1a8ff02ba9a6247ff1100ea1c652e622bd6a8ac26. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZTB32477883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57af0271fe4c32794094783ed9862f12cd26789012dcda835ee4ce2a403dabb6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZWFK2419698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ab1e7882c0096efb708f04139b1d59ed523fa78d470e22ce68b972af453575. 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/QZFYZ2598999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e807a3c7c8ad52cb2b1901ba130d5d116e131dd748de4e7d150b835206370bc. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZDA42530004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ee75cd5668ab117139e2762ceaf3b4abe757dea94e95e1caa0c3b087834bd0. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:59:45Z), 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/QZNWQ2538427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544ea5235e14b99a5752ba8aecd9d3fc76ed4608b4cd006e87d450d5a06b4359. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTAW2502155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c945ee942eabcbb55c4daa0d9f3480f3b0ca9a16ee9bc6cee20eaa666c77f4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTAW2502156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a44356a75ba519cd7b49c93b44574be1fb85dfc58209eb66b8525e030711ed. 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/QZTAW2502157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a46b1c22462df42abf55a7ed4a2c21a663f52389a525e0182e6dde43debe67. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:02:13Z), 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/QZTAW2502158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72280844161199ae4467ff25282a494b3c15d3d827bde2c16700556861e1d67d. 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/QZTAW2502159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30d91a875fde16cfed3aaa2d4ad4cee14faba9e287c02528812163c53909fc5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAW2502161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ed1db720e1a3c66ac4855174313291ad3202e6ea6d86da4e62e1da37d49eb2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAW2502164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd1217f0ac9a71be28c83e8c0a19d58f29e5a1edfc4aeb8a99af1d2f6c1cb93. 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/QZWFN2536531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db3e2c91e657b8a8926007c387873060314283ced1244078eef171e70498e59. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:30:02Z), 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/QZWFQ2527001.