Robertson may refer to: People Robertson (surname) (includes a list of people with this name) Robertson (given name) Clan Robertson, a Scottish clan Robertson, stage name of Belgian magician Éti
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 0xf8bfbd88d5540aaf8fadd23c4a3f168f04c15462502ed07ab579a057e036c53e. 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/a850b767-a9fc-4bf8-bd41-4c11cdde6f4f.json and https://artists.proofprofile.net/proofs/artist/a850b767-a9fc-4bf8-bd41-4c11cdde6f4f.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 0x38192cf8eaa4a22187370b90cae973c62e89b9b4d069ea1a9ca02ca71c678ce1. 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/FR10S1694041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a9c619029b88a1339bf83a44cb1bce83074489a8a98d15e232f54ff03492a7. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR10S1694045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91db698fed664884dcfe278e21b15d80488fa91be0dd41f7c781f228f15cb864. 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/FR10S1694048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9554f9b6a4f1c62722f4a701026463011fd829c29f66a89dafa591def025c35a. 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/FR10S1694050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f39ca55dd396683183b224778c5c1d223c63649e24f822a23f943e4af79236. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXQ892200514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dffc3573fa86b4bd30468c97ad8acc06b91cae6f0b3464388c8af24457316c3. 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/FXQ892100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791cbd9db1aa2cd2b48a410323e02edd7e8816dfd882abbe7c9224d67fca9370. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL1ZN2302576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b3546d9485727b5cd243f42dca39203fabea16b6e6b91c62c4013c1f0da2b6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NL1ZN2302577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f603602f7aa077dc1d664cd8f5883928ef1e20bd53928b7fc2cce6411a5dd3. 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/QZTV32325178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bffb527bb2c40d7928c6ca5ec009dc54ef633786f0b231c5fccbe6a067f0107. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXQ892300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc517af6490635bdd95a215d8025d29c472fb117be01c51d852544d71a752646. 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/FXQ892300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d5daad232c8a20ce4313d6cd5f7c71c55e8be1b26cfeeaacf1f26c89f87e8a. 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/DEH742305760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa582ff2a71b473e5d4d742b556fee61449292e28ded5efa86c8a7a5f44391499. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX89G2348723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ad62b33269e4048e155b665299be6031900f393f9d26ae11ca09bd5c39e0ae. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM4TW2306839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c51b7c834ba3813345495fc0fac6a4bf7f93181f2c20767359aef4fcd1fd2f. 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/NL2QC2100920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52ebdc1de407dfa634722307d5ac139147563760966bcfc63e689c35c7b77e0. 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/NL2QC2100967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb127892562f1c53ba72fccbbeb243964a3e42c8a9e2b75c9824284f7795fe41. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXQ892200380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0508458cad24edd5959a89ef23744a8bd1a149e97ab642f1dadd388d2e8d3efa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXQ892200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4558c90011fcdf47794cd7748b18b3c48dcf2c357317c82f8eff6a0b90e1ed6. 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/FXQ892200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ffa1130961acf595b80847b2cdb1d902f57a984a461106b61c5b028dd07533. 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/NLT2H2300522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2328821575f17c763777f9549f7033133405115fad3ca125326dcbe779162cee. 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/QZZEB2351502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b86990309b4928c84825a2fa78068dbdbe4ecad3e6328d0932e68307961b6d. 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/QM4TW2323161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9859ad059f7a459a85402ad13672c2cb8a0a43471b378f44e26e162fe932b56b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEUE12503268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f15771fe67f125ebe3745464cfb4959e41245b05a596b7a7087f537fd5889ed. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEUE12504533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf079f6ec8fcfad559c24541a3b8607f42615818a4fdf9c7a6a5c545f8a2d7f8. 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/DEX052493400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685e3d86052cfc142fcdeef1d29274af7b05be080b6ea17771e2dce2a8eccba6. 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/DEUE12503269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f15771fe67f125ebe3745464cfb4959e41245b05a596b7a7087f537fd5889ed. 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/DEUE12504533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ccf7a689408851deee55468254c11bdee7567fcd2f992e9f3cbce60d28306c. 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/DGA082468137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d0bdd6c39adbd39f51405a45aed1d9e6c065ba8b91b9228f21fb799b00b5f1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXQ892400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2ef471ce081f3d3d17eb31bd97a672452a2464d9b1124acb1e95665893db09. 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/NLC242100923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf0dcb982c0c38b8423e6639aa8f217e1da674ccdab855152470d145e04ed8a. 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/NL1ZN2000712.