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 0x5c30540e3e64463a9a14dfc34d1bd72bb3ddadb2c519b7d62a0f835caa9950a7. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c3d8ab0-f2f8-4374-9086-8f7adf289542.json and https://artists.proofprofile.net/proofs/artist/6c3d8ab0-f2f8-4374-9086-8f7adf289542.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 0x63ad96c3fa41cc852cdc10af1c2fb0936f0e7bb84478727d8e5ee67bc471ee4f. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/TCJPR2239351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5635f931bb3abdcd6272df57debf220bdc263012b6490b785b0b45900e3056cb. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCJPR2244559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e804ba857e5efe2085683b5650825cfb6219efc6cf16d6c2bbdfa44f0293e1f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCJPR2244562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dd43e7e34c5bcbc648d200a39fa6da05c77b40222b3010d4848ea0efd8cf46. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPO2147059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0001eacbe3c6b216074239b80b5a38e136d0308021bfe0473ffa73d030715d97. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCJPO2145616.
THE DESTROYER : [catastrophe] [feat. Cazqui's Brutal Orchestra]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3982730d1159bb9673daa5ffb48f80ba6290db6d5e6fb31a1e87eaa146875406. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/TCJPO2141629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53477359cdeb0989af445c81f7f50450a019c96ab9cb4f886c2e3db02a507d7f. 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/TCJPN2180709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f6feb235939a6a6e21f5a80e7ab4d24b99deef11d21464e4de9245a9ae5784. 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/TCJPM2050832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb046356596f8caac9aaed72451a87db9fcd8cbe4372f8413dbbbe3795804d0. 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/TCJPM2013118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2277caf7adfa5c0a409429713ebce1fac5fe685848c534928e23be277f2ca00. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCJPL2049439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15f2efe41e5306ab95a8a7e901af383e7d075275a02b6336366cd9b79e28922. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TCJPL2018147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca57648583a7355a023891b550b55db7409bb2538e8e9465a86b8193c42199c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCJPK2088967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3007e4843127ec7284c512d491149f8e90b85616f887bd67cc54e71a2292df. 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/TCJPK2081355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbf2d10d529535ebf1f312b9a4b2471a46bbde77fbfdd5016a073e3ff17ec5a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCJPK2025681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d37261c1f03065ebb68df439180f4dd467a0bb0d9cda0d31c653dc9dde011d0. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCJPK2025686.