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 0x66b75d15e3d31104f8b1ffa622763187818cc6d3d2621bf8888680e217ddddbf. 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/73a8d8fe-267a-47f7-b026-b5f390b0a3fb.json and https://artists.proofprofile.net/proofs/artist/73a8d8fe-267a-47f7-b026-b5f390b0a3fb.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 0x20060a649e837188be4684918a713ef7f6f48701dde00c261c45d0e0d86f8a2d. 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/QZGXC2400455.
Pure / Nothing Else / We are Hungry - Live Medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc4a4feff0a4362f8dbf713d44da74a2efb6bc88e6192527ef868d8ff4c8952. 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/QZGXC2300893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce70c4c75d7d761548592b89ad1f61455b12bf29eb48e027e7f21177d74978c1. 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/QZGXC2400456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91ea01e6865824da374f49b8dd648028830022d57a79e78c8251d0fac0420bf. 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/USM1C2400321.
Lord From Sorrows Deep I Call / Still On The Throne (Live Medley)
Pure / Nothing Else / We are Hungry (Live Medley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7c91b8c67ae2f1d4da03d417caefbd7e58a1fdd129c7f95caae29e2a9d6362. 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/QZGXC2200275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b83a72cbb8bcea1221fd0f84fd6b2b18aa0a847a7bb16195bd64ce040fae39c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGXC2200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93dd77b22b885a39b7bf64717d2389021eeb85151d528740ac9ef00604b50db. 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/QZGXC2200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf342438243dd41e137939e853fbfef6d2f700d33ca62e285a9072e555b3c2602. 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/QZHN72119883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b110bd5745a93ac81bd41e9f01a006559f08c0c5f13347d3c067278743ce1c5. 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/QZFZ62158322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f01b452a9d37d53bcd7206413c1c846492f35cd0f4086099a4af73d251b2848. 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/QZK6P2091014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e18ef997766ea42c127466b5098c6b1fd5223e72f7f69fd2a68694e3a2ac88. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHNB2050820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cada5fcd4b796cf98ba151372b12301e1cd4a729391791283332535c3618e8d. 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/QZFZ22016637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d7f09206d2409653c739a69bcdb66ad0f1ec3708bcf9a76968ef26dd2c38fe. 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/QZFYZ1961216.
The Way (New Horizon) / Let Everything That Has Breath
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5953745767ec76043ab6872049df077ae904b177d4221e7f16520a739f249933. 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/QZFYZ1978008.
Build Me up Buttercup / Blank Space / Waiting in Vain