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 0xc7ccb8321bdf28c5d9dea748086c94a51d75a68546204675aad2793d2ba971ec. 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/187a874f-3774-479a-883f-a4e3fc355260.json and https://artists.proofprofile.net/proofs/artist/187a874f-3774-479a-883f-a4e3fc355260.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 0x634e3f5789d298829c2fb8121754936760c691e6e1113e355376f769b3d7c806. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEH742009431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f85f0e46c0dec08ee6582b3ee66e4aa9c05496affe2f6db0bafbef983caf518. 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/BR5TG1900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877711bd607c7dc9cac9e613f4b3f5dc378dda8f3868fae2b5cdbacbd05da352. 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/BR5TG1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7303d30f4580d8ff657d42b816f550f4956f37852cd0a92c830c7f58d4cb89. 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/BR5TG1900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74a3a09b3b80d1a331f612f7eaf36effe6fed0c6f7a513aea76540733d583e4. 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/BR5TG1900060.
Take It Easy Baby (feat. CALIFFA, Sabrina Lopes e Fê Costa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc681727eb7647f527ff1f5096df52246ba2b2e41110c446a0dfd96d5ff2d71e. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/BR5TG1900078.
Kurt Cobain (feat. Dolla e Luccas Carlos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7962db5f8f07b53c4ce2c889f557b120fba237c6a3e160dcf5233f28d63ff411. 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/BR5TG1900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab3f8c8a7ba435c6650cece3b3393d8e6f04ecc067124745a7ab6a355ac9191. 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/BR5TG1900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dd37c0d540328346383e67caac0fa0a3ec5ffab089ae0e93bef237551a910c. 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/BR5TG1900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a5bbdec664c79a1e7f8a73b90f34dba24c33e7d36ff923dc6944064653adbc. 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/BXF4A2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02162b6ea0c3b5af30bf358c554fbf2ff1b4a0477b1e3b387a91cbc1b449992d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BXF4A2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf990523743a83a17a5162c571a488a5b9dd7d0503d12947f024e34ded257643f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BCBOY2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f834dd2ac95176bf3c4ed609816f27dde1502d41d83818eb0829f819e0b041. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BXF4A2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5384bd386aa1631dcdab36ddb60e99b085d16e011ea04d9535371ef61535707. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BXF4A2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74a3a09b3b80d1a331f612f7eaf36effe6fed0c6f7a513aea76540733d583e4. 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/BR5TG1900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7962db5f8f07b53c4ce2c889f557b120fba237c6a3e160dcf5233f28d63ff411. 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/BR5TG1900038.
In da City (feat. Dynasty, Nature e Hyldon & DJ Chubby Chub)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95568eaa1461abeab15982e245726565ea3e8b9a704dbaeec4826e1ba07c5244. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BR5TG1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877711bd607c7dc9cac9e613f4b3f5dc378dda8f3868fae2b5cdbacbd05da352. 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/BR5TG1800001.