Linda Martini are a Portuguese rock band based in Lisbon, formed in 2003. Originally a five-piece, the band was founded by André Henriques (guitar, vocals), Pedro Geraldes (guitar), Sérgio Lemos (guit
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 0x028f52423ffab30b8956423993b35e737814de39fbc7f0e89241c71749a16bf4. 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/327eea9b-b8d2-4f49-a862-31cb81b89267.json and https://artists.proofprofile.net/proofs/artist/327eea9b-b8d2-4f49-a862-31cb81b89267.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 0xbe2d5ca0e73279668d57e665468955686f27c4752219c7f89caaf3be01dffbaa. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/PT9BP0600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62e0547cac0e8391c541d720b2bf4d56d41e71e92f8c1b64515742e6a841e9a. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/PT9BP0600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3b9be972c9eab2d1c44dc4fd67f70f0382492f625191d7b57000771f439621. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/PT9BP0600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2755fb31a5ed5e5e7da62804cefe9f16c077919b348fe4806639ca2cc1d2339e. 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/PT9BP0600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fccde8749920f4c94818ff5b59368b3b75765e98beab0e75334acaa7623d28. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/PT9BP0600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad788f8aa2631c5ad5a4c2744434bb6215515d36650f835f0d39573f1d8a1a0. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/PT9BP0600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc9a0b73ce605c5b3ceb7fa8cc4508fc04d70965a65848d6e3154b47cebd3e2. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/PT9BP0600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1e2fcf1c824e3afe338ea7876e535edcabf7be8694017a2d6b72ef25643105. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/PT9BP0800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde91cc4a9af043651a54c9b12894be252b6b14862be2ba8a3707c7741828ca9e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PT9BP0900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79876ae6b3fd49314dca8efb6851584337ff2893cb77b762d8a8ec4c384e8e1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PT9BP1000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f58cbb4966f72bcb8edf48cfc6c92447845807d234806ac342cc0b3fdf927d5. 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/PT9BP1000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb0da54ce9406495af7a8aeb542ed3f3fa0cd95ead8cd572979aa2568648279. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/PT9BP1000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a4b722acfbfde3f0aa2f984fbbf80252533867db712473c415a3e427241c33. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/PT9BP1000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42e70bfb79d6a664d91a2c1c2a7743c8b56b8320fa38e0dcf6b0e3665d75ace. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/PT9BP1300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3f6d61feacc4fd5407413d844c4077cdf5f47cedf8e86a86b0e17b1805fe17. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/PT9BP1300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb9dc9d75421d607d0f42e437a440c687b547a0c8f7c87ebcd4aeba7d0a781d. 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/PT9BP1600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f97affb8650a539b2668d72354dc6c994ec94c1b7dfb848f0e89da2212b483. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/PT9BP1600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776f5b7a0befc7101b2f0b79b5629602e9462a469fb3a6dc0845bde77f3b2bea. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/PT9BP1600069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad4523951ae7ee7d3b16872b3f90063959c4a2ec1b1dc485a769109fb51ad18. 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/PT9BP1600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e03a573ae5cd02cc8026f72eef6230b87dbc81a8c70641b6ce2cd7259dcace. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PTBM11700267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf1e57bf8d1cff50a07492b4e4ccb7e5c6f98f84dc00265203a8e60163732bd. 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/PTBM11700268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf456cbfa9490ff9402fd239e8240c820298b15106bb62f89bd4db29224ebb4dc. 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/PTBM11700270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8726756a943de7ec51f097335efd9d1c10fe0f636022a37a9c10d8f4f664842c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/PTBM11700274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817b47326ab8d57b4dadb722e2cba8c4f263d771abc17f67d08fb44afb3714dc. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/PTBM12100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78105904d74c72f247d4ca603ea14a6a1e3c7bb8fe36036c6188dd007ab421b8. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/PTBM12100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4992629532650340d27d538b72fd5e39eff0b851599ac5dc2eaf19249c201ea. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/PTBM12100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58adf9b1f1735650ce2b24fe3f3497d187d7fbb08654191eea2c77a9c923b35. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/PTBM12100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b976880a44ad2fe23fe8d715ee6dad858cd668b52caface6b02287e8d32e096. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/PTBM12100213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9db9e194ed3830c3874db81c078d001eddcb560e19b521a8b78df74fe3adbbf. 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/PTBM12100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c995796fc6a869ca9b7f503fa89d40cece8c07a0c3b673425294725f4e23cce. 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/PTBM12400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cd7a3ceab757ded9460ea9b0384ec8f20d2b653a2d6156dd14c90fb0e50ec8. 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/PTBM12400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06d490eba8856e645810fe5b276940d830a0b632af6fda457935c454acc7458. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/PTBM12500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a4b7339554525bd38e9c978d319af4b5695defec21667cef39fbce43071552. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/PTBM12400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd706baf8629df2e562e8c6f26c1c5ecd068c313f730d71a879c1dba2c7fa3c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PTBM12400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5104823b2b64c228548d607db7c41f6961e9bf8c440b2b51c469c034faef3fe2. 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/PTBM12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcec58f5413daa20bf117eb034b68265d1165f96618c8c38d1b50f37300d94d. 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/PTBM12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3c5ab96497ef565f4020243f60dbe6c3ffbd7a81e6ba334b70a3ff3ca214c5. 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/PTBM12400003.