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 0x6584f347e6ac87a4c00ae34256d49d6a864bc09f62ade96e8edb42fbe96ad60c. 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/ca48b8f1-12a2-41f5-8d02-9eebcc54ecd0.json and https://artists.proofprofile.net/proofs/artist/ca48b8f1-12a2-41f5-8d02-9eebcc54ecd0.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 0xa60fbf77064a393a206cb457baf9665f6c919e805dfe062e7ef2c1be22aa1b9d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BCKZZ2300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef77c6bd33185e24016451c6e056ae1d63daab632b7bcaf00410c72efe09ede. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK2242401244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb0db23cf94344fece5746082eb88009d14cc52da7a2896de4fc7d5be57a78a. 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/BK2242401281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f966ad84ddb7f21f90afc795517ed8c3364e9b650d18a55e6f5de793249facf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BC3PG2331076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9aba58b1b8f6e3423418746a7f73b8b239916824ef66690ef5964444f4a2223. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC3PG2304860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a050f16e36ff7b2ef9093d356e3a4377969116c60b6a6eccf85ff791260547. 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/BK2242400739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abc1c3215084e628853f04d81c2c00053f0e5aa1d3e8f587798cfc122e6eb6f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BC3PG2331080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60097db12dc31389b1835e58c0c7418b6b7cfc018b2c825e578c3728685d845. 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/QZNJW2386884.
Vira a Cara Pra Parede (feat. MC Nego da Marcone & DJ Higoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062c34ea548f5246603123a7fc8ab75340a5cd576207e3053eef52d2b825a68d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BCJT12200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06be33d0f194895112a9d8a91dd578352353b5fca9b16ed75cfe2b978991f6b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC3PG2402902.
Primeira Direita Tu Pega a Reta (feat. Dj Gouveia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd990c9efd5ad4085e9c13f8b48766865c26bee2fef1ba9c05c70ce0cd56181. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES47F2300236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f25d0b92744bdfa19183e90d8658a7217a897f5fa4457ba160964b9108cb37. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BC3PG2403379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5c01789b36fac16ea14a86b5f06002adcec894f01b8b65bf6e1a6050a4d0de. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BC3PG2403269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a3a61bce14a36522c6caf44d6189c62238056dc1007425548c03505f7452ad. 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/BC3PG2403278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b425dcdd3945e9c1484c5857bb94ad1e433ab032de005875e7d1f80b831e8ac. 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/BC3PG2500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4c24b967c39a4dc50de1df470097e7a0d158a3e46d2f4c0994c6ec810510a8. 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/BCM9B2500173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7546ee75d67a79efbad64562e625e976b0b342cb94e987e1f58ac8be196d6e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/BC3PG2304770.
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