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 0xdbf4552b193c9a6b3b00628296bf069e599b81a9f704a73b60158e2f4bbabfe6. 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/cb15613e-c9d7-400d-9ce3-076b6faecfc1.json and https://artists.proofprofile.net/proofs/artist/cb15613e-c9d7-400d-9ce3-076b6faecfc1.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 0xbd9e16bc934735265bf05903968a74f978be121f9d79227c32cfca88d5352e49. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZ8LD1987815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a21a2a95271dff2e361d5b8e72e26a3010866762e694c74d630a3e01b99dfeb. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCAES2052477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bce2e84659fe6f3f5b384cd9569d8f9f24597ec68f3dca096c53c836bf9bd8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZMHL2064266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3601a04ebf51609735c08a7fe31cfff5d1c0fbb05277ce3c7bbb738c8b0edf0. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZS632195945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33428612bd333039bd07099452b95748da43c1aab392ef57963e5bacccd26f6c. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/QZNWU2269394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3c234096920ee4fbd1ee810f8b462ed773fd6ec11566e680f07275a8d2d8cb. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZNWY2239793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9010bf82991012977ee005252470e5e767e484657cfff15019d32ccc495ee66. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZFZ42317159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bed17ff8e58b7ad3effc3e352da3f239e3b682da04ba2804244c00fc7c83c0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZFYZ2440860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e7a31bb896bd7feedac8e4c79c9bae22b6bf23a0d3c06d233a3f5f6c39a0c7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIK2412198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed79f90f67a54a9cda9770ee76b1d0744963935497e480672070f57c1976aeb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJF2562544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3419cb4756f49e709ed003a899100e7668807a5b51b4d90d1fa3abf95b0c5d58. 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/QZS652176341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42a18a5a4dfd327e14b7fee6bd43400964e93dde263cf9ae62e23f80ce8a098. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QZMHM2273920.
4lbs (feat. Swisha-T & DJ Crooked Finger)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcb384d321df12d5ed890f28e47e7cc67b944b359b03b9c484bca97fa15b707. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USCGJ1620179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2853d1fdb59fc03a8c7c989c41e6d547eff91f79bc48621c50cc88f624aca2. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USA2P1202771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f20e2ded8a3ecafd75ea1fa04ad389a6b5904479f96462f16e4f20fdb73587a. 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/DELJ81468796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1462dec4e48dd6607c40866e96259a2c30897e7ed7d369bbf90f1dc7a476ec5d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DELJ81468805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71dbfac0c9f51fa06b6d74bcd913966ef5dd912df1088a261def5f9bcb863cb. 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/QZMHL2216970.