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 0xac86c274e7723a9e8c9ecc3dcc19bdb26d821d605d3816f73e06e32aca8da42d. 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/627731f1-d110-4a69-a274-a4f1258c1b68.json and https://artists.proofprofile.net/proofs/artist/627731f1-d110-4a69-a274-a4f1258c1b68.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 0x027580f8c3bda3d5097ae35a454f60b07d2411f4ee12d11244782a4e0a7a9620. 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/CAUM82200292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0368d2c7e9d070818a715fd1540e7ac1b7512964234655bf30fc4f755d15af. 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/CAUM82200293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb2e72b71a850c270d1ec78b6feaabff7eba4d2c5aba53fc5769e434a6c870f. 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/CAUM82200291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9ae1a22eeaab96a0583d3234091fd585218bcde55e9663d5edb337e59808d7. 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/CAUM82200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42530cb54719ae7edce35f7b522dbcb649ef724a396a0aff1d2ac951e0774ad. 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/CAUM82200224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710671c0545d1f0a5e68c52c1ffe7c3b15ef838fb3068d425cc1f1ae10c987d1. 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/CAUM82100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd9a2f5cee66046337eed268e1012b4a020b1845f8de253f49cde141120528c. 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/CAUM82300377.
Deadbeats & Brownies - Drum & Bass Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd9a2f5cee66046337eed268e1012b4a020b1845f8de253f49cde141120528c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAUM82300377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38015243e03fe2366b5e5818be9e95826f96846856dd19c007adead8a21a8ee6. 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/USZXT2454717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca308a524ec4fdf3f09b39fbf505d73b8967b3c6e63762820cb26a527cef4fd. 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/CAUM82400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd7093918b48aeba95108d0a1c2e75910e0716657d648b68f8b61e2dcce14f7. 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/GBCJY2300490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068e3f467a73653dcd4b9e6274e364ff42564a12277b23862d5b14dec1001e94. 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/CA5KR2316927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6eedb2fda704f74cb6182e524d3e73e2e76cadf3195548b9adf7e343ba8f82. 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/AUNV02100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710671c0545d1f0a5e68c52c1ffe7c3b15ef838fb3068d425cc1f1ae10c987d1. 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/CAUM82100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405353c63f235ed1655d67e48d9ee9f76b758d8ab6f5cb6a0dce494ddd70e24f. 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/CA5KR2316928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca308a524ec4fdf3f09b39fbf505d73b8967b3c6e63762820cb26a527cef4fd. 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/CAUM82400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38015243e03fe2366b5e5818be9e95826f96846856dd19c007adead8a21a8ee6. 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/USZXT2454717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3fd70f793367365d2b9ee5223c9df71cb6aef0791aa8575dd6e646e11a8033. 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/CA6D22400372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3fd70f793367365d2b9ee5223c9df71cb6aef0791aa8575dd6e646e11a8033. 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/CA6D22400372.