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 0xf6a46b8a9af18cf98e4c34dc13b05204bfa585d4bd88f783293363e4ded61d46. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f19476e-7e41-4698-b314-e96b143b9eee.json and https://artists.proofprofile.net/proofs/artist/4f19476e-7e41-4698-b314-e96b143b9eee.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 0x9f2451e3723a80b819dbb4adb08539d132d4b22474fa0b18c35649f9be2e8b06. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFZ62539517.
Tarpaulin Man (Floating On The Motorway)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1f689fc8426d652e700482831d6b4581bf01a2337200042a875f43ad690957. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZFZ62539518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bfa5ba3bb0e9ee17d1d9cd9acc1f0313b3880eec1b98f5f9420129da94fee8. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/QZES62504587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ace12b4ddd11f93f1990ffb8496272f8c7f68b994718e87a0ce0217fa50403f. 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/QZES62504588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98d095606082c0dbb3bd7b4603da39b56c9abb2a9a6b59615b13bd9ae888b5e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZES62504590.
If There's A Meaning At All - Short Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9260aaa5880e24cd3d17c39357a66be98abbf673075d523e6fa3453e386d4f. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZHN32556707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffff68dd4941fff687dec8b864c306870bef7fee92236cd71ec657ec170cf6d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZHN32556708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb29e6b7efde21dc8ab041f1aaa17774da208834759c8bfff38cab7f25473d4d. 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/QZDA62502990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8106118baca96db511ff2c45f2961c0b2a0b5196bab7518571dd2651b9ab75. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZDA62502991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c640e562f245d03857af2922c88878d0302cfec96f7af1ecec1d848d7003e7. 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/QZDA62502992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d594de1b8ad7a2e5109d04858a5fdfd25ba223b33723bb7394be94d2d99de52. 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/QZHN82545165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406ae418c4a1841e8aca0b4dd6b1a3c6d3b0a7dcf87be664a0495ea4f1bbe635. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZHN82545166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfeaed96287bf76d4aea48ecf60c6d0f27d2aecd49337f1bb74766ae6692e14. 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/QZHN82579517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbf5898d395b51dc93543f94f78a12bd8adea37a53fee2754234d1b4dfb9af7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHNC2549184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318db7082f91b1b2f58cfe504fa00522219d6645e4693b34290a34e8981e60b4. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZK6P2537454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5323f2fce03e2a8e8ee6bf632a3d91f8d9018519ea9acc024c5102820ba120. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNWQ2531889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b92d9f6d3041c0f9bc40e1d7876aa18846cc1b32840c6ede169b683661e821e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNWQ2531892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2064d4e2f3b53ed564aa22fc4cde36283c22a4922251a2c84da9157d3f92b8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6J2591075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0a2f4b47c73a9bdea91ec6a3b8619e60793bd9c36a554fecc358e175375db2. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZMER2547435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5961339e00b5b4e5c7a96b37371e93fb8989e7c6794b3389dbada3bfdd00483d. 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/QZNWT2598377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7d729c14114f86dab138c63f9d2dd04f36758839fa1338e5f5d3e1a95284ee. 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/QT3F62567106.