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 0xfb1e9598ca86abea36aec066ca1a674fd90eeff230bbc9c092bd6aa12c4a1566. 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/cc92eedf-80e0-4072-b2be-764b1f793341.json and https://artists.proofprofile.net/proofs/artist/cc92eedf-80e0-4072-b2be-764b1f793341.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 0xbef4323b3f8fea7be44418af554b8a6e475a8b94b548c94f691f49c788d2fbda. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6P2074341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da25610a5424f21a194c9e50f32f5b1be4c5e76d7d5e35cebe89e7827235882. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6P2072639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901fd095dfc975dd22e097b8d5fb06b627a902eff39bf5fec4e103fe3ee0884a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6N2064670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198189cb8b94dcc676c624cb5ff657736eb1d22614ab1640dac1b06d3680cad0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:45:37Z), 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/QZK6N2064673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6137c8fd6f08f042e4856150a9031814a2721a4020a6eec3a490fa19445d87ea. 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/QZK6N2064677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25159e7b6993d485f610f5dc117793e4fd5603a1e7724fc31dac7bd86f74588d. 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/USUYG1366628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b3fb25329df6abaa2606afefc386b608c7cd70b2c4c9306cadb21624c1c26c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USUYG1366630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad4aabda46be14c9bb5c3beb9765c6f2ccc5169c3a01f5a66ce49ad5a4dc5e7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USUYG1366631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707a47ffc29c9bcd16cc7ec08d75fafad545d5b11eed6ab00c167cc2d33aa54e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USUYG1366634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af28042b891cecc60a5befb2c34c656f25472c58348d14a36a7c54151f5c827. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6N2111583.
Aye Hu (feat. Jay Bahd, O'Kenneth & Reggie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe7a04c88c7f96d0670c07f9cacce44c80fc9e84f2a4466633b83d8861faedf. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZQAY2283195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639bb3d12261cb3a244b75ca056c8effbd7e366cfca2574b62d1079dfab85107. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:54Z), 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/QZQAY2234607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7453ad7ac70eb2edcf2f0a5fce9487f3a5011a29965abc80ec19ab33a9ede82. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZQAY2271003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b8ddffd3c1ffbadce5fb309444177d7c23075d277b26f88fbb75d68ea3d6d7. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:36:43Z), 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/QMBZ92341586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8da3f776f0b456c82752e693953ce3a15e86ee890b249e8d35ab12c0f9c9f43. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QMBZ92341587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9979ae09c7f961cc44113bad993e1bfbe27ab519504107b4df3159c133bacb5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMBZ92341594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7b14fbbd5b2d34c3f18f1fbb97027e5f47d6f90adffb56aca3553ffe457d17. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUGBT2416382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5ea6f5c7c55f951366ef29183a250bdbf80549408da08d2201307683cdae72. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUQ9D2400461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a40e8306bc91ca633960818813353e2962e59ddc618a4919ffc096fee062f6f. 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/UKXN22233973.
Chanti (feat. O'Kenneth, Kwaku DMC & Terrist Carter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148adc0a550174e9f7cba5ebb72b71838d18b18c69fec2a6a28321597e69611e. 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/USUYG1414715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac821dd5064b3b90349ca828d52a27bf4ff1db080eff92a5616000b6cdac0e4. 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/GB45A2002378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cad6bb95dd968a7ae36446ea01d06bedf5e541ebadcd97f0cef2787080913ad. 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/GX6852200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6ffc7ddfb72c437207e967f1c660e4eb159eac9645a837c0c1c5d79dfd036f. 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/AUMEV2334191.