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 0x3c494d466be24629d79f72d1750f57cce43264cc233cfab02299314b31e914f8. 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/8c5323c6-a824-405a-8e42-faeeb92f0e5d.json and https://artists.proofprofile.net/proofs/artist/8c5323c6-a824-405a-8e42-faeeb92f0e5d.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 0x350211c31314a6ae64cd315c74f168465730fa7c27efb5b0d7dff03028f52581. 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/BR4IW2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f41220983b1da2a3575b524d1c9b2130a61526c500054ca3381af0db54a2d5. 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/BR4IW2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bb115a006201752a594d45f6588842626c408a5ec06fa1277afa985c784196. 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/BR4IW2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eec4e2dabbffa715c9fbc9aee6a83d2e55cb518a5200e3dad96552995fd8a00. 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/BR4IW2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1059e196d9ffcc24d5f71d082663a132256de605104ac738e32fe707c3f339df. 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/BR4IW2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b7b238f3801f0a02e2c9b3ceb43106df4db16314b6007058659aa0ccb14454. 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/BR4IW2100008.
volta da vitória / citação: us mano e as mina (xis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b21c40f10e2470401a0001fdff9c36236dcfccc482ae4575b5bedd95971c39f. 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/BR4IW2100009.
favela venceu / citação: rap das armas (mc junior / mc leonardo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b758e8a2700773259a45ede041ccafa5bc26bc27d3f3cf2ef2c70bd3b2f059. 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/BR4IW2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c5c7d0059501153058cedbd274565afbe1261db437a3393c3365df4f01b4da. 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/BR4IW2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8e0d11736016dd9a52d44dcf235d96e36626f5293529d1f66145e8196ee42d. 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/BR4IW2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359699d6d2104d305ccfda47fbbd8a45a1b8f8ea7591ce92306a042166783b6e. 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/BR4IW2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ddd04fe348105f4cb6e85abf5eabe6d2dbd1ff418bb86143ca8cdbaee75dd1. 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/BR4IW2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f46a784c44e5907786518e7b13b66cf92c48063017f395e9d5c274156662ec0. 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/BR4IW2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb197cc6ac588b161b90cd44e83710c77dd09fdfb073c84a92e729e293e4e02a6. 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/BR4IW2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad5ce0c0f9e20d25fb6e8faf985abafadb4da3c3204cb8cbbd1f27649810a24. 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/BXTQF2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a23b816ffec14837f5fc6d1521c1a820b8ee46fc843ad5022526ec2df045d6. 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/BXTQF2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6c4527e566853f3ba9fa566f2e383b7cd10f3ce4627e90d00fcd9b9ca430b9. 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/BXTQF2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8216af84a886b78cecd137e83b456d32316ac9aa53200fb1cc8594d0437ba5b. 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/BXJUK2300001.