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 0xdc9881c9bbcab02d88081c54c6d633b5144fe8005040bea8323cec7fa1e97da7. 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/9df06e8f-0cf5-4371-98f7-ddcbb018144a.json and https://artists.proofprofile.net/proofs/artist/9df06e8f-0cf5-4371-98f7-ddcbb018144a.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 0x13c5a69d8171271a8c0ec1161e465292bdaa8dae63ea4aa67adb6a3e0cea7991. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GBPYM0730088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690954d1fe4aa5f9bb262c0769d8c548de5a3c5d5da9f3652cd97b15fabd0799. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBPYM0730090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804b31a86d771f43e0e61d2e8d09b631cd6fe060e0808d69240a57cdc50cd912. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBPYM0730091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0b940ba4331e8af4493f15c21e3174885501cdc90e2f3a616aa67e1e3792dd. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/GBPYM0730092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88be3100a30305356b9060bef02671c261a769be725fceede9af2aca59dcb3eb. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/GBPYM0730093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b01998d4fe9ce2da1593deb78bf4e28904263cf76d9a8318d20382b6b17d4cb. 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/GBPYM0730094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4793f980cb9a311ee91794a992754174c38335af09e6f1fb5d61806885936a71. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBPYM0730096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1a637d5095e716f13d65b2cc86dd35e788a3f890b73b23cc578c981ad912e1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBPYM0730097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640dafb42c8f1b129c0e5bf716b14f7635f42fb1494205242b2042e46903b668. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBPYM0730098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c2fcbead614e7be597a33662c03700476424d93c35d9629e972caffc302d5b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBPYM0730100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9f4daeb057de8bfbc2b72efd06a53c4cfc558c21915af65f6bf13f310ee1ea. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBPYM0730102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6e6ea424aab6b9863bc113131a06edd6806c34c446e64b9e26db3c6386a0a6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBPYM0730105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553e62859e0c4038595896d3d529e273074aba2d39e5da4413800c63a454b95e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBPYM0730050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5a4c868a739293f9d33e4eae0fad5636df01d90ae14020b8651d382bcbb223. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBPYM0730051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fc4d020a7b309561d83e3f55c3c6dd32344e54019d0abf19edc3dafd3f0eb0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBPYM0730060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f996f505feda5772350a3d7fcd31d28f3bf08471c3b40da60090930fa145ad. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBPYM0730062.
The Wonderful World Of The 4 Skins (The Best Of The 4 Skins)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece796c4ab475fcd08a9f5444b007f30cab16414752a14eb88d2e9ac30831f7d. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GBPYM0730080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3465db59bd6aab7b0c4768dae5aec8fd27321ebffc933556c922e68696fbe431. 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/GBPYM0730066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6f1eed5216bebf2a3f967b4774b1f066b6992838da0aba4ff1eb9b64a8911c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBPYM0730071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b306b0c8f4c4124fa2f9fce796c423d1e62d8757f7491a262a5569c53c8667. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBPYM0730072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedcd949f8d4a6b6fca22acfb68717843de6baf675b3ddceb0021171109b97e2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/GBPYM0730073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefe9aefc397c086f757984da2a409fcbe8814e840afdcf37e1c7990256c13cf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBPYM0730074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ceb8dd12c76e886845ed375997235bebe164287ef9805b434a465f7aac2276. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBPYM0730086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b306b0c8f4c4124fa2f9fce796c423d1e62d8757f7491a262a5569c53c8667. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/GBPYM0730072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cd6d9bcbe96a4faa4ebed9620f5c4616f23ba98dca056ec08ef39f1251ddc4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBPYM0730087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e80742dc2d216427939d8e25d830f63675374af0f7c6beb150b058831a41446. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZ651006434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7786faadec42cccd72fb1532aea814097defdabd8cc1dd610ee495f9d3c8a3. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/DEZ651006438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4c5f1c213bc4b83470e2ed15cd68c18353debb35358f0b00341fbcf5051d69. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEZ651006439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ad86afccf01919e076fcc1ee14ffcbfed93850f210f02f907d2616a8aca503. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEZ651006445.
Burning Britain: A Story Of Independent UK Punk 1980-1983
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c77b11ef138b7a702b6962707dd907623261907775fc4d42f9555df07c74027. 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/GBBLY0604802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0d9a9a1fd41c9f3d3fe741c1fdab8b156462bf2bc51a091bf690a70e13720c. 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/GBPYM0730070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c650802f3c4cfaa164d7252e508760d9d344dd022bc48b360db9d0426cc1045. 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/GBPYM0730083.
Oi! The Singles: Classic Oi! Singles 1977-85
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefe9aefc397c086f757984da2a409fcbe8814e840afdcf37e1c7990256c13cf. 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/GBPYM0730074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a713f58773ac280f1c50e953024e350d20dbbe2efcf2ee945844b78eb2d19e. 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/GBPYM0730011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6496d5eaa538afb44f69bac02e6629a1722ddbed4ec45af0dbf16a2829b37d39. 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/GBKYA0706840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc404f936d41112af1f215e493293eeca3da0256191b9f21798d21e32f3737fb3. 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/GBKYA0706851.