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 0xa67987118221c81ea10878e8228a13f69cbcd6e9acd8cb95fdb73ebc6ccf1e84. Chain 2 (Bitcoin): anchored in block 954055 (2026-06-17T05:51:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43b6b310-3715-4cf3-a762-fd2d710ba5a8.json and https://artists.proofprofile.net/proofs/artist/43b6b310-3715-4cf3-a762-fd2d710ba5a8.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 0x11622eb719913afffd6dcf74ad022f076ab7fe847a3320a0cb624880b456bc89. 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/US83Z2320768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dd727066e6bb529873ce28c96b573ae78a267b7582a4a64ff38aa91027cab6. 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/US83Z2320767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff32783b532100a163d43f631376f40dd548eda9c722cde0ad2b533aa7c98580. 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/US83Z2320772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d4ad6e1b1b5a1f78a28e4fff021bdf212f2f56cd66361630fc016507fbff49. 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/US83Z2320769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e34c97b0a3afc84d46fc9ca0a3488bc05c5e01a047408126b2eee8f13c1a302. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US83Z2320771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bc475a47c35e7e3db87428f9a31dcf680caa892ca836e2798d67a6d813a0ad. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/US83Z2301766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a14ed585b1a5d4e242cae866babf6e0e69ac3e57be800a4675e5592eb24ea3. 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/US83Z2315729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e68c3a68817eba35ea403bd089722da40c85df2b4a7228608dcf68f03c25b2. 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/US83Z2228044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3389c7b564b8d32fdae292cdf53c126059cb5a3b5a968e663663896c0b22be. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/DEH742226343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcace9e2ad55b6876c1703f01fc478de38b40aa07762f6b47420e11c0215db62c. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/US83Z2220777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81332ebd6a14a8e4cd83db90ef0fba2e655a455ceef82c704f62b9a23a01451. 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/US83Z2219081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68da31595b49068c2c8b5f316495670ca2a85bd9507f7bce4b8d8c2f16349b7a. 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/US83Z2229306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5958960dcc3c9b04e0f16132881a5bbb601e32985547a9e71f7d4e6953cf1b. 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/US83Z2213689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da3f8716198ac7c92e51ee6d3db7e81e136a7a9fb9d406fadb2ddc0216b82a5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/US83Z2220247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00621ae3595a8172801cfd5f46bccd79dd1df53982497eaf7f3544c0a22c65fe. 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/US83Z2225566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd47d2c6eddbc4c201b34ad32ff5cb53f7cebd1cf1624326af7b00c725efae9. 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/US83Z2215516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fe0e820951ef895948659915ae036bb506ab6a839d808699556310170e1f6c. 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/US83Z2219083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4910529cae634e3f6fd9940c922056e26c6d20271de162b2ca6eaaeced0b7d. 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/US83Z2230307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e68c3a68817eba35ea403bd089722da40c85df2b4a7228608dcf68f03c25b2. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/US83Z2228044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa76d0235cb3a5ed57a686ace89843dd64905a331f57fc19c7b69d1ccdd9d6b. 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/US83Z2231104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb877847d9ada2a3abfef9d03ace21b421bc069460f2317b8eb3db97fcc52070d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/US83Z2308731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60fbd30b74bfc52a3f120d638318ff6595695c212f24f5776b3b09257192d46. 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/US83Z2206786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a14ed585b1a5d4e242cae866babf6e0e69ac3e57be800a4675e5592eb24ea3. 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/US83Z2315729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0aa45c7a64c291440559cd2fdb656bec7bfaea3c6c650def63df5cdc08e7df. 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/US83Z2321285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411064abfb61f162fc0a43812d143a62dafe95d1332fa345d6d003752fb55042. 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/US83Z2315254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982354ff2bba3d4a2215fd327f9bb75ff2f649d6ac79b81ce40eceac723f9f7f. 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/US83Z2321284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55a093925bac28f7888f4d583a9b963415b888d812f004092af7851dd70ed33. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US83Z2327419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d05b5199499d7d1d44d957adcbf633347f47f234b6d5a5d67c506fb65e87f97. 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/US83Z2219084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a963f90304305b5d159b8335a3b2d4371607560f897490438a5b43df07a3177. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/US83Z2312708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5799959168eb2cac177f8bc51103263439ec047a35c5d8417980fadcc0230df4. 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/US83Z2309811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55a093925bac28f7888f4d583a9b963415b888d812f004092af7851dd70ed33. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US83Z2327419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d03efa01a68cd0fd3253d49d1dbfabcc378d87ffa29f07cce071dfe6496472e. 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/US83Z2315255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad95db2ebe40727efc2e0fa84ede7d49676c6d4bcd69fdbdb517f92f8285bbb2. 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/US83Z2219078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d05b5199499d7d1d44d957adcbf633347f47f234b6d5a5d67c506fb65e87f97. 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/US83Z2219084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411064abfb61f162fc0a43812d143a62dafe95d1332fa345d6d003752fb55042. 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/US83Z2315254.