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 0x01da6ca16dc194b549bec7ca2c0aebc589f41331f5ab40888fcb273820ed36e3. 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/70df8443-e21e-4025-811b-10547adaf5db.json and https://artists.proofprofile.net/proofs/artist/70df8443-e21e-4025-811b-10547adaf5db.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 0xdb6cc3a0dce24998d0e46651f974606ff1d87c181b30f90776308833492b2fa4. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BCM9B2401005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c70907a9dd6a96db6767cec62c6245263ea1ceaae52fa442e8daa4b0fbddc81. 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/QZNJX2439174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90356e6129120993e10862926669d8b8f3f09bca01a6e9613a9158720204f86. 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/BC3PG2401404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea62ceea74f7e96863da90da1941da1e066c0d13c77c966bed76a0320fa1888b. 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/US3DF2436504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1391f3ee64f837815f29d2ef0d2455b40f0c554a4b583e9c92d13705207f1a3c. 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/BC3PG2400928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84bef1ee27edd265f221450531c182f20891355809d196bc11afc9286e355ec. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BC3PG2401037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7ec238007f188c463647b05c37b3e4d719e3ff175d5370b76a543652c62b39. 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/BKHYR2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4be6ddf77d5fc919632501d78e0c3cb95941a9de623777ec5af5bbec0b10c6e. 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/GBMA22499898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c710b4508f039a2ac5622fb5ed4a7e73dabdf08c6660c2d5291ec8e9520411. 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/BCM9B2401562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e8dad1ec0d7cd51919af3b5c5635b611bfc6a27d4de234883436909f084ddd. 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/QZNJZ2461564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf46fe6ca7f4e8bf480286b571b90a882c30b637c8b8cc2d13c79f2f29adc18. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZW9L2443704.
Vou Ter Que Parar Com a Zorra (feat. MC Tom da VG)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f556d01a9ed6ca9ca3dd75786a335d3cbabfb135069c092834a31363ce03740. 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/BCVK92500990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ab7a51e29f5641ea09311760249e0bf97a3988af5d96963f78f978c2496ba1. 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/BC7MM2500066.
Chefin da Boca - Passa o Fuzil na Cachorra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ea9a099f33e56eaf7f84712725b678ea511821219713f7699a0fc9daf70bd4. 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/BXKG22500143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f495cac215c8991d7e0c1d81cb167ba8594185880d2e8b4d425091e9392ee1. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZGLM2508304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73880d76f4bc5789fd928284e3a5491d686a7b2a85e90f8bf739c5ca6e5b298. 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/BK2242400652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b91af87c131590309c0f0bcb6b7f1fd9dea4fb904850cd77fb1d5a49fa3d32. 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/BK2242400647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75aafcfbc4cbbcb099ea4b95ed81335c4e5755fe171e2eee7f0a8e09d5cf878. 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/BK2242400649.