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 0xe144064f840bc07b744d88d498a0b4312cf8814a72cd44493139f09b2c0182f0. 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/49cf2d9e-a5c2-44db-bc6a-cf97c5905abd.json and https://artists.proofprofile.net/proofs/artist/49cf2d9e-a5c2-44db-bc6a-cf97c5905abd.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 0xfa537e4f8cc8c6b077e0164b1c5d4ed3c689437920751d4aa43e0a0c69050fd3. 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/QZLL92215253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4e7208d1df685752278ce29544d926b1428163926bfe5581f15b5893359ce8. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZLL92215254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6234218ad52ed1ca720ef5d88f8c7e256ff38feddc895d0589ff9533a4b76913. 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/QZLL92215256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe291cdd5af339a813021c83961429aef04f5cb419d28402ac5e33749da527848. 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/QZLL92215258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93410a66a7fdb67f99a7f59d36df6119564c14add551e5b7ddd6cd12751b185f. 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/QZLL92215263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaebe08cdf36a8472d3ea1576d052cc2494e7b85aa69b5a9a8e2f6b9b171c87. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZLL92215264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1679db71c40b85fbc73b2d898b3cc4e4a025cf4d50301d9368983c2bc38e4c7. 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/QZNMV2014367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ad891f45cd6fdc79416eb095cef67cc69f6d1db0314de6dcd22f82e7000cd5. 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/TCACD1501502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb2a5be0cb672cf53f67d204e76caf4b2184c51562a542695fad607e4d4b618. 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/QZNB82045800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e329c0fb1f4656665d9e5f3d200520c4810eec4e152b3d90bc4a310626a108e. 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/TCAER2090781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67327d442e6d44762299315d02213f030d3f8d662091fd64c0f716f58dfc3aa8. 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/TCAER2090785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6642fe83957ef16fd4d715e9cabebb2a7347890af4b91e409e84cc1f7016c385. 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/TCAER2090787.
New Faces v2 (feat. Earl Sweatshirt and Da$h)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5845ef1a60f2be1fa2054897a264917e68c0e4845ada33402ad2336e71cc588. 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/USWB12100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429f1c080a0561d0fd26ea1d34b3daa4ac2ef0ed8d0754d4da97e7105d2e0145. 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/FR5R00906268.