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 0xbceb726bb490c5f62157f35252d27239b3d8360c05d290fe2c42dd48f4eef809. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76195562-6e97-4e66-84c3-4b40df3b45d8.json and https://artists.proofprofile.net/proofs/artist/76195562-6e97-4e66-84c3-4b40df3b45d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Food & Water (No More War) [Remixed & Remastered]
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 0xdb9b394e2c47179ac57f961cbc15805233e4163b983467be1260b8fc34fea40c. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QT3EY2418616.
Food & Water (Remixed & Remastered) [No More War]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca309bcbee302d6fe2ce2a77b0e7a5130e0a83692bfb456c01a1a63fa1179ef9. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZWFR2403938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923ffc7dedf2c48dd7c33cc60da368597aab4452d0c375e35a8579028623ff28. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QZWFG2468733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407ce4773f49e743774fd2d06e23d55080c0d0ad6e3ae4af0db5a4e70d973561. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZTBF2483931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1399f124cbf1e31bb0d2337b9cb3be1a174a54c8c7272d56d44deaec48451838. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZTBE2448242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8c1778ce73d31b95496919ece859b54c415112220cc15bd281daa523393ee9. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZTB42445171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd66279139babace6bc84e6c7336c615e64da205b852dce442ebd607a9fb23cb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTAZ2475117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8275e63875d6c3a387ca38e95c5b71358c0e8401ac0479a732c91a5a7fa0b340. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZDA42440982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88608479dd43f83654c7e1e16a0b741b3321801dec08f377ed42b9baf2bb5a00. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA42440919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc46eeeead571d6f352c32bcff8ee2d4208d51e8c2770e9dc8e87ae25bb2d5f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZDA42431799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917a17e324f8a49bff89331eabf42e3e33bd695b6507c9b84810f526a5f34e7d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZDA52420070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3225e7d78006b0ae640b28fcb1482464aaaf2792b4cfed6b247324db3fa1baa3. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZDA42431272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac7a42e7906e0fbf70c4aacdb9cc6207abbc2cb8cfbbe5ba5f5657013a30143. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZDA42445857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9844c5b854efe096a95c8f93b3595fc76df5f0c0790cd6ea1bfcd68382233c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA42413323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7ca1b413900c2d5f8f81b70c45e72f63c317dd6bc88ad6d407f5a3bdd71b11. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZDA42428470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adf29444e7f5dde85be535bf111f5979f40d71039a1f147d3dc464accabe907. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ72481711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddfcbeea46511a9cb261859a7e0a4e0e39ccc56964c930294fe3997a5249d13. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZFZ72479616.