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 0xc0de7954c46652dd7dc435d11a4f0b22f9c6e251f9456620c7ca97706449a2eb. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f37cbfa-72f9-41c0-9c51-20e235a12df8.json and https://artists.proofprofile.net/proofs/artist/2f37cbfa-72f9-41c0-9c51-20e235a12df8.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 0x16d26d1046d5d95e099a12c259c39998608cccf4a1e87de1297514b9fbdf793a. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/FIHL22300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7537282fb279e9f7ebea30354cea143129ea2bdad603d5a16b0c86cf1cf817. 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/FIHL22300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2609173474e722d6536d032565f9ab52e0463f84240e27872119748111b3f6. 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/FIHL22300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3a2afb21a05a72af39e3fbb3cb453a76c9c8218a40d6614a268c90427473e0. 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/FIHL22300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742966236a8d23247ed87ed7757ffd038ef8235db92b3807b2b2c80b95fe44e6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FIHL22300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d142bc1b0bd7e562886e0c8c8cb6bbeb9e78461d1bf7931dae8dc6b67e8ebf9. 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/FIHL22300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45040f8558f37b0b95e87f8101b97d47df9fe91912b42a4a7d7beaad2c7e4573. 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/FIHL22300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fa52012d432a8d5f6d53523bc10d6d3707f70ae856ec5e4b1cf44f3cde0b4c. 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/FIHL22300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffcb61969c7c9e3ff155d88b8df43749145ef8eb807b903a5281b16e1612eb7. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/FIHL22300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16d6c20f827b38c444116affbdd0bae442083648f01c25b7f6bff1d40cf2f3d. 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/FIHL22300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a99ead3a6f8db865c5de2a964a557a7f6333eccf6d9be0fe3fe172e4beb5e72. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FIHL22300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde278047e39c96de18b627b6be950c130b0bc2d9fe12a71cab7000f0634df353. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/FIHL22300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace8b75d0d27ad855112a8638fb267cde44c477a2a3c1e8cf75b5e8ad50bf324. 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/FIHL22200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a51a63d7a45c6b9df85d2d499b2bf84e52c0b7b77d9cf86bd242186db6a43c1. 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/FIHL22200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2964e7f44634e173347bdbdb60c3bc89dfdaf3777eea97c2a7188ff6ed2a97c. 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/FIHL22200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43175e7639950a6cc3767e2cef63047c03d859bd9a575cc9138b07e99dcea43. 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/FIHL22200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf990b0bc224e7e001dd6c6fb91b1bb7f7a836f9f718f8fa718ea462af919e55c. 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/FIHL22200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c86c92c3b811da0caed61e8403abdd33398ae328934be53c753224ce0896337. 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/FIHL22200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249374142aa3f1f7c6a6a0197ff288be8f526b316c0ac8217b5549358eaa2a31. 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/FIHL22200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac9890f42204cf9fd46de3cf59bc12673e81d0cfbedf1c1f3843f9c25e4138b. 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/FIHL22200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc4eed85d7b0c9553fb2a561f155720cfbe8d840d80527e8563a57f9baeebd3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FIHL22200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709b99fa3a7214dd2a4574ada61e03f8ae40eab3acc9810fe53023e0de238785. 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/FIHL22400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddc69d389987a623b00724f56d3ee005d8f9a0994e4217d592d289cb2722845. 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/FIHL22400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef0a49f6874d73297fe720f0c3b5f492abdcea52e4e33ad260e15be575ba03f. 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/FIHL22400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709b99fa3a7214dd2a4574ada61e03f8ae40eab3acc9810fe53023e0de238785. 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/FIHL22400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3a2afb21a05a72af39e3fbb3cb453a76c9c8218a40d6614a268c90427473e0. 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/FIHL22300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7537282fb279e9f7ebea30354cea143129ea2bdad603d5a16b0c86cf1cf817. 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/FIHL22300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f822ea6f1b98b7ee5f49a6ac56ad5a326da1d5f77af35c415debaa2fa85bd0. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FIHL22300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0525cc61b7bef16d6e3c76597884d343661ab37ea83e80b04fc549b226447013. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FIHL22200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c86c92c3b811da0caed61e8403abdd33398ae328934be53c753224ce0896337. 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/FIHL22200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c311fc88ec6c338a03fd69f108a383931f0db845c9b391dc79bb1183c84561f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FIHL22100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7695fc051447b55cfe74786e46a1100e3c599f0ffd66e7934a9f02b0a5fb67fc. 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/FIHL22100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c5bd8bcad7a6d8f7183c5c5ce8e2f9440a9d3080a6e3439adfefd45e45bb87. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FIHL22100004.