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 0xfbd8522812e5358b8ff7781d88b6c0230f94712ed7419590a2712f7b90ea7074. 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/a069893b-43e5-416c-8073-100ef03ed1d8.json and https://artists.proofprofile.net/proofs/artist/a069893b-43e5-416c-8073-100ef03ed1d8.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 0xc0e346f953e32ede3259157a9febc643713e6f9439f2df54c7ff9569da1c4695. 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/TR0391300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f9144b28eea7fb84ff35042020b5dae031d8f471c2d3a47f509a4198d9adf8. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TR0391300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e346f953e32ede3259157a9febc643713e6f9439f2df54c7ff9569da1c4695. 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/TR0391300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58313a8f6c57e02aa96143ddf2d1da3cce60eca9a9113b6c5321b6f300c5a1d. 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/TR0011400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0e835234cb79fb721639689b4237b660a880fcbb62759953187e4e3824b63e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TR0011400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d96666924af79c4b7cd271e8b6cdb245f26ba37aeafba9fd3c4f7739007de0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TR0011400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ad9b3aaa4e365fe1af0313d91544c0e15decba1a0a781a97cc437ebf1f381b. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/TR0011400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcdfa1cbb2ef17ae705d7320b52dfc6fb1cc10c979b5492480aabe237254710. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TR0011400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2506fd414cb8add8c52d48d9cb6324a8ef973d79336d2e62d346ec8e6567e66b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TR0011601011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b971c6eea22718c375c5f10c673ed3f813d636e3c58c18ea5bd1c4624c652d. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/TR0011700410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d35f95c472d9adfc013f38aa25b2abc3c2e0b5a17f1a99f0e5349b2619f9b45. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR2X41998370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb2de36226ef7d8b22abfa0fb303077d09610f570cc52cbdefb58fe60ccb904. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/FR96X1966156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36001b9f762a69024e72e7ac6e9eb8bfeeb497f2f004e4bf1ed87b5a035ca255. 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/TRBMU2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2f16cd3314c7b96f51a948c2a49e31176ddbd0410af38d4662177f63730aa0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TRBMU2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd02c821360410dfa17562b906fc8464fe218c925ad4ac57ac9e848bb4c1528. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TRBMU2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5d159776a29901e0308f3e71e95a46a33cdbd414f8172d30da230ac09dd609. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/TRBMU2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c23329552b9f6d772194f51e50490c8cf0bd27607de574f576ccb7f195d22f5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TRBMU2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822d4d9081db1ca98295c2c8ff11ef3c6ea06b9334f3e62d022dcb590fb38518. 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/TRBMU2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb211814bea9c49ff988501d6e49f7644f8778c1ca863d5b265cd86b9def4ae8c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TRBMU2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86fe67ad08caf83a5e2dec60cbd4815c18a994ca2c1308c0deef37611bc6645. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TRBMU2200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bb3c33c6467edb3a0a951c97b99136836fb9b3ef32395b8090fc8b56e718d5. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TRBMU2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2027a7de3aad643580202417d73459a757f9f06df3361ef75d4e5e8b883e2c70. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DGA062466782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcdfa1cbb2ef17ae705d7320b52dfc6fb1cc10c979b5492480aabe237254710. 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/TR0011400141.