Tudor most commonly refers to: House of Tudor, Welsh and English royal house of Welsh origins Tudor period, a historical era in England and Wales coinciding with the rule of the Tudor dynasty Tudor
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 0x21be90efec7ce164c3313a73ccd31b9d09f33858fce8923cd007faadb3de712c. 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/ce71f2d8-8edf-4b9a-af61-71c6f8be0c26.json and https://artists.proofprofile.net/proofs/artist/ce71f2d8-8edf-4b9a-af61-71c6f8be0c26.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 0x910a5e7b3197d8ce22e6887e1e22e73ef1a83fde16797d864426aeb08d2ae535. 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/DES232300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f2a66b502d0c1c53f5af94bdb943af8927d9b91ac7649b43edf0f889c03f20. 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/NL4VT2100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59cf0c7fd68b12e555c54fea377ce525457c959e58a086f76100da4dcac4349. 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/AUFF02200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2420dffb7db24fb1c80b4ca7ec536ae6a48ede190ba3ca83685ae5119de96035. 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/BCCNG2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0308e922e406bd92b96efd3074b8b4637b911b51bc7cdc6b8767b1796c4a9da. 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/CAUM82300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d98ace113183031fe8d203d7303cea9ae707eeca9e1dc80ad11fe456318f914. 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/QM6N22424089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2e99990014d4636a1d724d750c7ce46609e54919c4e96840bb72426a808f6c. 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/NLT2H2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3451fbd53c7a84630822b02d83415a746ed8d818463d6cfff5a26d98601e6e. 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/BE4HK1900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1620b8a423ba7b7ec2928e4b24f07d3dcd9be758a0fb518163e8410acb6ac81e. 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/GBCJY1600081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f507e9244e4158e3784db957465bc1b56da98b2574ae2f6d58ef52c4f392441. 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/GBCJY1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b09d2cbb3eb103e06558364ca15e4ead74d4b00c7aff8cd2f5b6d9a38feaa25. 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/DEA812400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb5c2f6b08871b89ee875f9644b3f6e681202cc5d62c6a3bd7310aca860ced2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USUS12200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706882fd6e9d44546a678c173f4ace3fa7fd75002a13a1789d8e13e117242d5c. 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/US38Y2309136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0776e9ce17deda6d143b658cb1a5d10c7b300ee5dc488be432f8c13f08f46b3b. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/NLM5S2201867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb7f84ba6241e6f31e4356675e844d86d8f5988d4231b6066c1a10a12bbd5e8. 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/CAUM82200363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0308e922e406bd92b96efd3074b8b4637b911b51bc7cdc6b8767b1796c4a9da. 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/CAUM82300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c5c70fb8f906b12b4e48392fec94d07ac70c7a0afc917179babe5b25f749dd. 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/CAUM82300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ad0110b96c979f7507b900d8658ae34c2fe1f584f80121c8da825fc08d25df. 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/BX0BA2300016.