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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb75d647171a8dc4d1964eb74f6a527cbf98ac0b67c28b7538f10324e12bfcdd. 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/760d085d-6419-4375-bc51-d5e415cb6292.json and https://artists.proofprofile.net/proofs/artist/760d085d-6419-4375-bc51-d5e415cb6292.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070cbdda8ae0355b8ebad4f1d4998be62d079ba645fae25489d23ae3eebbb54b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/BRQIZ1550036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93799379264e3cdc6c0d51903564c93c6d8e6bc6cab73c2b70ba953d26416ff0. 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/BRQIZ1550070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb934acdb277c2099abba3d774eadcdc1aab6a02f4f6c6dc4cd2a815fa21e54. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BRQIZ1550303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0723a991afc36c5231bfbc59b309279e3314b2dca2f2eea7ce3583db1197d3. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/BRQIZ1550310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd868be467bb1361b41939b75955d2b09c0ee552a7975ddda2d36c4d16a1872bb. 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/QZTVM2337172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36bde9ebc971a26230de0a4ab3181150585ace927da3590f7e328cc870bbaeb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTVM2337174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260cbd73e47c8a1286e71b4d648fa5da78e43d5c7b654e1b2f816fc147db19cd. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:22:58Z), 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/QZTVM2337175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556da053ce7358587ef235c15640e55c6a414878be540fbd15de564f38ee8ac6. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZTVM2337177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c64d52635e03dfc016d6424e0817094a0549c327577e7201a0379c63959a4f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZTVM2337178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba324e6807e594a56cfcb0942a6abc974e3797d51db4b5dc1b5617035611e448. 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/QZTVM2337182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2678172b78e1061434c0f92f416e3826dad0eff04fa2534a821aae78c16cf59. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/BRQIZ1550077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb891e05e2793842822758709afcd401efe3f2d907520c9710976aba4d9b935d0. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:35:23Z), 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/BRQIZ1550098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578f32c880744f8d504305d129e0fb6536631dc59b5686d49b03d13bf9d2f09e. 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/BRQIZ1550102.
Desafio Nordestino de Cantadores, Vol. 2
Desafio Nordestino de Cantadores, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466c12d7b1b3e848ac2aaf10f9e1fde13b72e45221ddfe804cd5aad737483d57. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/BRQIZ1550144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1b5e181903e79532b06589b0f740f6ec780950f631796cf51663aea1d8b679. 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/BRQIZ1550152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156617095425947e0688b9edd76aa903621093e872531a47feba1e6f0f4e91bd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:08:46Z), 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/BRQIZ1550153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4cfb7a41790db8455da217b3151396952f1b37dd07f6f0c66fbe645be35dd5. 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/BRQIZ1550161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec9ca0b2b3468633a9d266ea36d18b4ecd26faedba421b15a0061bb952a1cc5. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZTVM2347023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831e1d26d29055759996883997a57cf17d499ad953489e5d7c406a6a56f47834. 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/BRQIZ1550164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1ac6cf374329192779006c67c069d38fdadcc3e454eab58c640b0e21b797d7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BRQIZ1550165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088dba10435507d63ab75cee8ee581e99278548bdccf8766d66ed06f944681a5. 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/BRQIZ1550168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ebb5e8c01162dd06d648971ddb811d4d4c5f4bae4c7803c1c8bda1c0b5da16. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/BRQIZ1550169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d699d6d05cb05f9afbfc9374624294ec52f95dcd497207b90581e88277716ba. 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/QZW9M2442884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9de1338230cadd8c23b31623c5ef05c2e5fc9efd59569106ba29fa490d7769. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZW9M2467775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ae697d14d3c5cc9d95d2427e75d5c63b4a635b8de716015313c68b7aec64df. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZW9M2467781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ca3d0459a2a7b6f756a9b15308eefb34eb16c99946add5f68f03a339de029a. 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/USCGH2147029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7399936650b33ed49b2364ad7307e867c2db38d3c144f41820a1e10d92ac52b4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USCGH2133530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4531c03fcba748155dea90ae875305b5768bee547f72753359f58913c26664e1. 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/USCGH2133534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8449a9bc891255c75f33acb8d3a7a670ac00b5ec2f9e0215796c5eed37e660. 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/USCGH2133535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209889601f3ddb66cf5a106c76a859bc819fe17e59d20d1c3bc7744d83e52328. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USCGH2133538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d17c5708cb44fdbe72fcdd5312ea87d49f3a249f1015dd65a1a976cc81a6bd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:37:05Z), 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/USCGH2133539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa0b1fde6b03ec5741211fcf65e3926e273e7364c073a3e56565001148b157c. 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/FR2X41855544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8300f3b38b5c0d1365e8fdb1e4064406eaf8cc0709de4faf3fd1678ebea93d69. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BR1841500054.
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