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 0x413d0c40322414bf4170ab1704df2345ab4e1553c41417b0b9fd93d5debf00a4. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be78d974-776e-4dc0-aa28-42dde4eba9aa.json and https://artists.proofprofile.net/proofs/artist/be78d974-776e-4dc0-aa28-42dde4eba9aa.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 0xabe5f299dfe29e09746dd5482d754e0ed8ccb4e4070eeef20177a39dace0ce32. 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/USVJJ2120801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69456127f26def2f7d42b4a526ac1880fe92e07757cac810f93fcfe0a1703f86. 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/USVJJ2120802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed96fa126bc286b2c6db0b94c0b12131597cd0387aeb017ff59d1b978bde1d46. 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/USVJJ2120803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5956121605a6f6d3e34d9b39d272e8953f4d6ff05369618cefabaafe34ac96. 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/USVJJ2120804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8719294d5a1febbf70a4ec0213e29bc8c7be190bd220ec62e4ac3cfcc3926fb0. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/USVJJ2120805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77eadef7f7c26103a156160500f480209e210a8353085073a76aa3b7ff4f536. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USVJJ2120806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ec9405f3c92246da15ec01987b357a4d8d41b92dd520ac070bd1411caec1d5. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USVJJ2120807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d6c17d58496857f9939258823b42be32dbbbcade048f02c3adced8e6c6befd. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USVJJ2120808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58054a1ce37143dc591a9297ad1647a06362539eb8062a15b9e735cd82081818. 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/USVJJ1816301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82591e7d9a05bc8f27de767739e4fe72c9ebbb21843d0f6916feb9f54e2d750b. 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/USVJJ1816302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48fc1c67a21d6c3fa3b4844f762d0129217cd9e2fb1fa436443f238400345ac. 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/USVJJ1816303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe57ad2a50fe9055479f90f8edbb3f5d67730c1786a10911fba9e6ddc3363be6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USVJJ1816304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79c44589c9c3cd69960955f2906680e46640860eb3755954a3fc0333e492291. 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/USVJJ1816305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e04a69f10fb80e5befcc9cf1c2a33bc5e4320fe793668ee51bcc1ba11b0d72. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USVJJ1816306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43c7a53bd1d4830489074a9d230af309d2f69130372b4b7d8559247eaa26807. 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/USVJJ1816307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb65fba891737eec5e727e58e0444ffc3a15f260484543560e27de5b77ae330a. 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/USVJJ1714501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa555a38823875801098e737d065d4025aac4fb1b7ae57d47a0ae6ae7fe419f4b. 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/USVJJ1714502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e31e6158f3cf74f1ea43423ab163fda0fe985499582da3bda4f34733b323c2b. 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/USVJJ1411301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbae732b810d19c6412b750bff6204a68e5058e5052549bfbc1846079f76f93. 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/USVJJ1411302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e0ffa796f325ace3f9d15919978c64d1894e8f6a0116b7400d592ef687106c. 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/USVJJ1411303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a9333c23e5e3e72804660ca50016c805b487704f06f1c38543e2bc6ebdb7e3. 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/USVJJ1411304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0524c82e615db6d383cc8ae5950992973e7540c1a447f96b1f08bdb01d8ab441. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USVJJ1411305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939dde41bbf8ba16b583dcf8a846eb5a2b33c95e4237d20df36c8fbbde113d08. 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/USVJJ2424901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6f0e7a3040c00d17406dc2ce67ff7f698ee768d6269b29aa914acdadfa79c6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USVJJ2323701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe643ec836a2a8870b974dc097eed67e0175167c2e53584ecd314269c9bf131b. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/USVJJ2323702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3290572dcfd9a7c5798b38760ac70206a1ed9652aedf732ce56e64b33acc36. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USKRS2170006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb43ea4e291f764224e6eb0fce06aa03cfebfdd97ef90bdd8487ed517b14866. 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/USVJJ2019001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc513d0217dcc9b237775c3b284e36227785f087ab75216eae1090fb765822fe6. 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/USVJJ2019003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dc77511ad52b8af24121b85d918800d19ff6969d8bcba3d9f78cbc91c0afb1. 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/USVJJ2019002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d13f9574135fca59132683a2d3b4ed96ba837d89c7d37345e28b1e980e6cf9. 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/USKRS2170030.