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 0x1a828e5304f5d8f4fc69e6e3a15f8c441f6a770446f0fc47550a2be784044bbd. 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/84b77bd1-02dd-41dc-953a-ccbc268e188c.json and https://artists.proofprofile.net/proofs/artist/84b77bd1-02dd-41dc-953a-ccbc268e188c.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 0x2e562e8a2f248b341ffdc9a94ee10a2dd4d04f49ef65389994c49d03400a9e48. 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/GBXWN1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8468e8c253625b7482d8f578202ce9e5ef14a60cc2d98f89128b0ed2b99c43. 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/GBXWN1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8434e98aceddf79f395f3abf8c6f915f7efa13524b66ee0de4012683c4bc67d5. 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/GBXWN1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6b07b9c1edabdd3e3c3a8f3e931893149d0f922fc481d2e0e17bafbc01365b. 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/GBXWN1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491c7edf10bbdea16c32fe80630f001da5d8fcc28eae063e59972f5fa45d81fb. 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/GBXWN1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe36f493d29580c667bdae0c4a5115b70d95ec12469fb27b7e9cead13439e6b. 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/GBXWN1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03c3e1eacb8138fa352cf8a400988044dafd4518ffc8eaf9656312a87c30f2b. 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/GBXWN1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7586025442607d26909b8d064622759e6ebc0c043d8efa01852382b151c2a1. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GBXWN1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec8c6d76855e3401315384315edf492082271acdb55a721aace060d7f3d3311. 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/GBXWN1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0786fc1497198e50cc9851b23bced5fff996c2cdfa7456fb0913d0964b9f71. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GBXWN1600014.
Natural Born Killaz - Best of Serial Killaz Vol 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae604d66c66c8db896b20322e42a4265973d91cc1891bfeb7a61c56660ed154. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/GBRD51300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ee0ce4df26a2e3388e846cbc0fcde635e1cac6ced36bd27397036d24d6fb80. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBXWN1000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bbdf875b469912d14af32b8675167d6e79eff05964949947166c3312923dc6. 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/UK6WC2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf08a5cfff8698a7d1594496d03c0276bcae65a06360e74f6d170cf81ebfc6c9. 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/GBQZQ1200380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ca81496fa9b148137266277aac632d244664fc579bbbe2aab6eee5d10edab4. 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/GBQZQ1000621.