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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ac404c72c0273a8af6ddfc75022e6ba7c268e19bdbe2cd4154ebf1b999b4c0. 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/32b89bb2-63ba-46f5-a7af-6b4ea39a892e.json and https://artists.proofprofile.net/proofs/artist/32b89bb2-63ba-46f5-a7af-6b4ea39a892e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2518e1f58fb6e2bb7ba78d743daec85b8300dde951a2e96af1269ec4915664bb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BXSMM2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2ef6c20df5d5b217d82a2723a37ea7a692e2384a6c3506aaef2803a68d90c2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXWGC2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1321149aec5ab8546e53f32fa9e186c21022c353bc20cb1e85809d5383be5c0. 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/BCT1S2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d145856c6b99fbe40ac457c2ff5279f6ed7b05e7e5040508732524787942635. 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/BXWGC2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac213f9c31b17acabd052c53d8c61ae04da05526e4ea87c5e1801dfc71b81517. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXWGC2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f6867a03d863cc872030258029f3b7038aef36bc7b16712e0a5f9f6bf7e4fd. 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/BXWGC2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa823a2d84946fa78ab4cbc51a6a6651abd57a4a2d7c64ac2a32fdf315079ab50. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXWGC2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0dec742df8b310219e42d48b4d4d0ddec4a05661a819162412bcc111c75b6a8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXWGC2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459395b2847aabf4299efaa169c1eef26d8e7cc7428a9e8446c06f21eb85c5be. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXWGC2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99253c0825e3db8b76ad4e5f7d191f4d41ce3a16ddf333d417b5485a341a51f7. 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/BXWGC2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065d27e18bc73d95ca0f09f5d45b83eb5c163b4231bb8c4e956632cb04ae5d3a. 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/BXWGC2100012.
Barril de Pólvora Parte 2 (feat. T.AT.E, Cela Efeso, Tom Calvario, Mano Sassa & Vnegao)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b765ce400822cb7ca9527917b4ea75d6d7eca51b45dca0a6e4a2dea88eebbb. 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/BC1ED2300001.
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 0xbb7523d010e53974a53d71120f7e7aea240f7cc32841af3876d4a51033c8339b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZNJX2253679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737d84fb72f3fa55b415044ff7c8e172acfdecca482f596028aa70ad5f04a28a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BXWGC2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e57d08b0b2bdf3c0efe34ae5b8ce1b8d44c74b67ec1299fdecdae07b54a3067. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/BXWGC2400009.