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 0x18beb7ffa03410ec3fd11cd6d1068ee16db36289d8a9d215812dba5e6b9a0764. 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/f2b44cb5-6eb2-4421-a72f-48a3ec064cad.json and https://artists.proofprofile.net/proofs/artist/f2b44cb5-6eb2-4421-a72f-48a3ec064cad.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 0x3c09e7b0eab1521c31757c292bbd8c00f2fc25c688062784cbdc8c68c9f2f747. 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/QZGLM2507353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb679b30196ef78ac866caa4ff5f333c1a1729f7d15668c2438cb4197fcd0e3. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/US7VG2557247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152ec39a2dd2bd4470ac88391c25482ca6a3545d7d85452e0be6b15178adb4b5. 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/SGB502586267.
TÁ LIBERADO O LANÇA vs MOVIMENTO SINISTRO
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f086bcae93f6ed4e8080fe138d1df2eb364f30858a3e670fa75bb63cb95216. 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/AEA3A2246705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801029068c5abc14e04207cc130552f5af6f74c65c6201325629f1bc24fa709d. 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/BKTKU2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95a6ec09b38fe1a108d6e08f8379f9b743b1ec71bc07a60edf420ad45fb76a5. 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/BCHFD2400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88265d49b984e8c9b605e61475bec3dd04ae365dc029b487823a92838f3218f5. 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/BKSNK2400388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203b19e6ebe7ae6717d896657795140b7662c969a6f15dc02b2b662d9eb214f6. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZW9M2408667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61f8826c783792712e9641f04137618696e03e94e476657f0e251fb905f82d0. 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/QZW9L2442938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619e751e0a74e40eb86621d5994c7b8a650149975db9f60bb700fc935dc64ef2. 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/BCB4F2400427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda82693b9f9a333d715df7e37ee919024153b9720bf3d9a7d0e1e92829183d01. 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/BKSNK2400383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec46b25411d92241d515b9feabc7500f01c9d35d4c6169dda4f5cb1494412fc. 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/BC3PG2404030.
So Ta Brotando Xereca (feat. DJ Barrinhos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eca2e242544856a1b935a102f4d0c2f97ec40fe580db327971762128097e4c0. 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/GXD7G2278829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59432ee1ea0ab5b6616c0e07721a07853d53d542a867148ec8e368160f24ccbe. 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/QZNJZ2468564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3267758200d9387489f328462716d595370e2d206f890f73a4c15186803e5903. 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/QZWV32443582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b7905741accae19facaf7a7f45bab7f5b63444e3361043afb680af8d92f7a6. 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/BCVK92500557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f0bc219e4a1e9b545322f9eaa15b8e38cce3604b4ab77a12e491100b6fbd01. 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/QZGLM2557318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee34e253b8ce259bd40b3f6f8f82eb2041e768ffd3e613cde211c084289fadb. 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/QZGLM2522284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb735bfcaa5fc54feec0973c08827875ff504caa11c6c66dba3df5549fba1f295. 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/BK8O12500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac129ed36a568ecbec020027e38dc0c0d6b5a1346ca9a6b8d0d167fd429b39f5. 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/QZGLM2540324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c0357f3a73b4a59161db36fb9eaf7e506e51b3867d4348da9a44d7a80734a6. 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/BC3PG2401822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8082ea19faf56d9eb19ee55d0bb04363ba8eb61ac3cd397f4eb87ff5a36dca5d. 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/BK2242401278.