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 0x662acb4736809c020259bbf832980e0c14aece4a85a9383f1eded2742c92f777. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5448b4de-1ca7-4ac1-b05c-cedc129da555.json and https://artists.proofprofile.net/proofs/artist/5448b4de-1ca7-4ac1-b05c-cedc129da555.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 0x883245461befccb4b648e3b282c4ce925a8fe89187c0a4f6c3fe60895c782724. 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/TWA532101172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cb67c0030817b0b82cee3e9d9c8cc04403605005ce5cb0c8e3663e5c4c353d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWA532101173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2968a663cd11ab40e7746cba5797bf08852dd3430e694edac8bbb8dfed00ab60. 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/TWA532101175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7914ddb719ec10a866365b840a9bf74be0c5776c9abbcf77eed43c8d6b8f08fa. 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/TWA532101176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dbb87ff95e9b7c4f08267165765161fa8879f0dc5842ee3165b93be28e42a1. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/TWA532101177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06fc69135432b68befd409ce22b9613ce5f910cba73f859ed6171592049a45a. 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/TWCC32003766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d26139662d48716d75157a67cf0a23cab6c829f27b4ab71bc17d026bf8e762. 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/TWCC32003767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf06ca37ebc51707531b856083a7cecbf4956d984f492363a65ccb9d712f6d0. 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/TWCC32003768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fab3a26e5a01cc4a7e31b40d3e86139bd26d18fae9d24fd44a85ef2b61f404e. Chain 2 (Bitcoin): anchored in block 957242 (2026-07-09T01:00:33Z), 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/TWCC32003775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273da74dff2c33437b45364eb78c6da4a94a4df2b8edfff180d9b3f58316e413. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TWCC32003765.
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 0xbba658e41fe1f0db25e4ff42755638d66f63a1858b7ca3009d8aae35757bc5fd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWCC32003769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73076fb4f95eccbec375f50bcfc2bc3d33343a09b5afa34bc6821e3e9aad23d9. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TWCC32003770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa555ba126dbac2405fbbb28e3541ac936b36c4a2f7629dcf3c24b4d397dd3e79. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWCC32003771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811f173242dcde9910deda5c4f3879edc2f9cd5698e00c894c9ab97bd2169c05. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TWCC32003772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9482eff846215f6abfe60bf8af4003269930abcf48dce1d7084b1ab3f09b7990. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/TWCC32003776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc838440163848d51ad8f81d2b8fb78e52b80af05646f26398739154950ba721a. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/TWCC32003779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925e2d9d933d2832d2f009cd82bd5de1675731d49a3768c82f4753d9f51d98bf. 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/TWKE52300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea41267fc764e5b8f6238e15f5008355c146fc424632150646074004f04de285. 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/TWKE52300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9a6caed09a1616abdbcc9af625c7b21cfc1f923b107dfc5034c6953fd532bc. 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/TWKE52300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4613654a30066645a74cebb19fa50eb960020f9a4ae90f3b5461b976134a17ce. 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/TWKE52300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95faedcf3b17aeeb82e32207878f90a0faf811dc0b96328daf0630a793a178e. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/TWKE52300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde77d4d297dd308f05402940f8c3dbdf6ec18b815226940f48be9f94a2dea5a5. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TWKE52300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2797fd4f6446dfba0c49d7cf033e672eda58b3d75d4fee18a7e09fff4418da4e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWKE52300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a8b78240391f8829b2c73b0fa480ef66c2d11e50b10b4f58388aee5f5abbc2. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/TWKE52300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ba065772a45478067f3e68dc2ec74e1b6a2fe02d236b4d1ad24f4b91cecd02. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TWKE52300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64603fe0768480e17232b17751d593ffaa6edf6cfa39e03966cbe845c26fcd6e. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/TWKE52300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc32df1bed9b7993225251994eff26fe7dbc21bbd971e21092673498bff9c8c5. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/TWKE52300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35dc18f39accd188ffa1663960f6a028b2f6b51a7fc157b5e14084e688f3b63. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TWKE52300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd9b3ee1b28fd90e7d0cc6dae5d483e5f53aec1e3ae1c3fbaa315d1db7887ad. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWKE52300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafee6ce2f5e4492e6d7fd928a48e3ad4da745121f7dd2ba7452721ba682a693. 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/TWCC31701480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48a554d96382d5ad60a324cdd0c2f4041f43c03b580c7e5dcafca50c544a082. 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/TWCC31701479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ab745c9d3c14f5831d46b3c3c92983fd5bbcb5ba4b52071c2df9ab932192f8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWCC31701484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9f48d49df340ff78086fc3dd3a355394b68051c562a1d7f996e5700fd9f836. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TWCC31701483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a22bcd10082331608c45fb184dc791cba074fba5b9fe2864c21adbfe2f56b85. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TWCC31701481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e5ec0de32514336bc0b6171d01960e89a54367be724f56eda8390f38a9f9d1. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/TWCC31701478.