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 0xe42f6ea4468545433ad096fcc2bc6cf6a1d888fd734ccd8359e08e2feb416c06. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a64485b4-6b7e-48b8-9152-32baf3531481.json and https://artists.proofprofile.net/proofs/artist/a64485b4-6b7e-48b8-9152-32baf3531481.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 0x00262e4b6851d53764f740363f0486a5a46881781d1a5b93cc218a6744957f8a. 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/BRD9I1800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99f7b27eefce1c4b285003b15e54a5afa240b7e103836469222124f1a30511b. 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/BRD9I1800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb623fad6323ca3d99a3b8e07b8cd65221b9551f52b31648be53a1f9a0de155bd. 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/BRD9I1800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dbd81c93bb9b0b34daa4e3410bc20eb53440cbe5e809f4e498522780d0c636. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BRD9I1800049.
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 0x188afaf06a5c0c09b535398e99e2fd56ae6cc5c295e792951affbea30fb9c4c3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BRD9I1800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3e7e8f49f2dd08d37ec3b1a99e8509e9f3c347de679af0765f497c23533159. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRD9I1800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e87f2f2dfd1935c85f11e49fe5ce218b22af153a621df931aa47d493312105. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/BRD9I1800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59f7ef21efaf520272f81358ac93b837124997df3f46559b721582101f50579. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BRD9I1800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6838f89d2b5e6e451bbd89b08d806f5c128cf615a050396001067fbd0fedab01. 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/BRD9I1800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33486879b9cb387752d7655e3035dfcdfc8e20418d7846fdaf63dcb0584ef0ff. 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/BRD9I1800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4621a96c38c840ae347355e884a477c33aa1985c8cc2733c2053d02b15f239cb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRD9I1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf20e5700039d255efce542e04c54fac0fbb78ef77c5b15e3612fa7d28ed0171. 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/BRD9I2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf21d832fab4eabaf0bc0a470e1747eda58bf86c9140ba3215ea11bb53e7960f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BXDFZ1900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8597bf130dbc89d1c50d787f54ed9cfdda6ffcdf7d841bbf9ee1f805e0fd1f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRD9I1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8426b66d8a0a32cffd16f1a82023976b147a52a7e576349ac84bddbdbbd6f3bc. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BRD9I1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028f6beb45577fc4461a38cf716733a8887c8232d9272cd77eb8e8d67246ff9f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRDE11100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d8ee819ef00cd906b8a8b1ba44ff963548a4b0938e1270d6d7ce61205e4bef. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/BRDE11100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc2c24a95f231e2d86101b804443cb0f331e533b25ee3337f3ceb68bd42658d. 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/BRDE11100004.
Clássicos no Jazz - Paula Valente Quarteto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824c054625007a2f116f04278fec7f38cdb596c911ea4c10be8843ad87c7bef4. 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/BRBPL2200028.
EIN 002 – Debora Gurgel, Vanessa Ferreira, Vera Figueiredo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34b5842e87e272a9d02ac0a0dcbd4ab827968a7193ea05dab154afb18046742. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BXSVC2500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc609f9a06405ec5ff56d39e0ac91fda3b69e17fbcc1e6c897b2af412fc3bfcba. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BXSVC2500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea7652ec23a927b56b4a0eb866fad9800db30b6b8aad71dfb50ca1697edaf5c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXSVC2500037.