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 0xbda6801a51565e9bf9c43d11f180efc0c6d203490ec776cca80c5e50f943c2f3. 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/acae0506-7cbf-4e20-aa2f-e27cf6830d1a.json and https://artists.proofprofile.net/proofs/artist/acae0506-7cbf-4e20-aa2f-e27cf6830d1a.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 0xdae50d3c09e65a2c4799c0abfcb6c60b916530b498cd319ce43eeee15842fd82. 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/PLC062009166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93234796cb3280610151f4af820687387bf5c2e6bd15a3a97db53158751701ab. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/PLF242107538.
Zwykły facet (feat. RX, ZBUKU, Hukos, Bezczel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef331ec247bb11b3624b4bd2132ebb2c12ddd76b9262fbc447077e2d28a5c26. 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/PLF241906565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68850b012d5e0f552e35a14076c43c077195755ea29b71a680e00f8c2f05cd32. 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/PLF241906566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9dde14e892b8b1e71d33f16293f7f386e44ed557182e8ae7b8cb948619b226. 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/PLF241906557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd591462f768201124baf0972ec599efad46511af8c91ac91820fb471c0dde968. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:49:28Z), 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/PLF241906571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea2c197899dab984ce592dd7334b66dddfc458bc99e51d5349bc045e58c200b. 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/PLF241906574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6da6da9f1f40652e52e37be9f8911054df1b7b4b71ece61cb7cdd6dca72bec. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/PLF241906618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dabf7ba6990084b8338515ff12e9ca2c23f57ba0c33e590461324ac4dfa8a5. 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/PLF242007204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb6d3ebef25deb651763d7b82f392a18c016a9c43f0eae9541202091cdebd90. 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/SE6XW2122215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29afcddfb674b85939af6143e344e2994ec4402df94d916235396a091fd5ece1. 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/PLF242007168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d46e2cd0f2ea2e0bdb0076e19745b59c8855871dae4c19ddfd5a5e059c8c9c5. 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/SE6XX2199496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7e5cc369eea5ad73344ce4db3cf3b41c852c27962b9e8a804c8676acf29cc2. 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/SE6QE2072944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9defa4fd81f0853692c61a0540c0e4e05dccb8eec25ac0c47c0197e914435fd8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:10Z), 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/SE6XX2199497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f60c4af59644b8f456afdc1b405b42df5b35b3835f4ebeb01ce2c9a1ab5bd4. 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/SE6A92198369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf324a4862a0ec7af194df1d9daf1214f2180aa05a75fa13a040c58591c0b2c54. 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/SE5BU2117040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fccb228bfeb33f3aa079bcc7dd656156ff534d530e79e53cc98a59fd7cecf5. 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/SE5BU2117039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c994b7d32a8881bb15b5b19403d6e5fec35acf2a58f8b47e5686127ff95acac. 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/SE6SA2156676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a7b5cfa637fe636cbeb5b1c0a4813c8e60a4ec93e5a33393da3ed428c8c4d7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SE6SA2156610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6531d2e0763e8e5fee0d8753257d52d19c7f1320473311580d06f210fb392625. 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/SE6QE2088632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a939f1158e326d7ad691230e5b6f34abfdd6b6e117d41cf67aa3e6c707ee205. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/PLF241906580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c711561638caa9a89c0dc2f37ce18c0635744924539743e4b4fb516d0d9eb76. 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/PLF241906783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a7729026466fdbdf1a171a4793285447b4eefc57e5dc26cee070a9ef2a7f8c. 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/PLF242006837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996534e43cb6d08ef7fcd0189a0c20dcd09cbcf887e02e79ddeeb3e58acda66b. 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/PLF242006845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fb28b36a8894de7bf04cb984e8bc46f6b706af85f78de1d45b6919f0ab93e6. 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/PLF242006846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5114cf5b53cf3aabf139b203104eecfd19f502dd5bc93802ed841f9fb2ae50f. 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/PLF242006849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d0f313d959616bbd50b5bae76c2944a1d571fcb1f43c679e9b814b0e724e79. 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/PLF242006850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb6ca43ef821d81a1c70e9998bcc663f796fde9e4f738414505644505c1b2a9. 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/PLF242006857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96040c9280a00a8aaf25c2440a54781ff2c7e73aa788e48a5c5930f1912cb83. 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/PLF242006853.