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 0x6fcce0a9b0fda8fd2128b99c12266cab706aa35cf7234c8cfa58538aa5450080. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/086dec9d-cbe3-4e73-a67d-c4a1cdce0dff.json and https://artists.proofprofile.net/proofs/artist/086dec9d-cbe3-4e73-a67d-c4a1cdce0dff.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 0x3167bef954a7c9f4e779652432a7402b5372c27a3862b811b15c2a82e464e8c6. 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/HKG070380001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7e491d696e6629396313b847521737580057e4d8347aa2e9476c8972972517. 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/HKA610401088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10925468081e3cd572b77a549411c9cfe423f15c689020193abeda04a61e188. 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/HKUM71000704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa569546f756af0ef450cb64a1995b3ceed021ee407d9f5c61103c668f5563d2b. 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/HKG070100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2641699cff2b2856331cb14db58d20fd92ae1d470b2e47770ed2b4c6924b4238. 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/HKG070400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a32626285aa5361b7b11569faedf909dddeedd208d96194cb87297937cda118. 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/HKG070400039.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff57203f70069dff25a3fcb90f30a673970cf0d741391c240b458a86679edf31. 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/HKA610600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9dbea5e2fafffaaf7853a05b9a0893cf01bd92e0109f2a7fffb30007f3ce37. 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/HKI498723101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515033229fa310c57ed121b7f7e5513592ad57ea513dd62fc691f86e77762337. 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/HKD048800805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd545971eb27a01a560ad7cbf1f58de24c9192f95f1d25daa6addca6b14daa6. 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/HKF360605001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd847ad5eda27e1392586862de2ae6f8b85333e1a2e5deddb2c3c34788c9c8a. 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/HKF360605002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e11ec0415da9dd9b68d99e3f4344127a39cd92c26913202c5e13ae59f4d2a4. 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/HKF360605003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1ff5139c522a77950e4297e36e11a23470cf16bc266fad2714f2175da3a9af. 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/HKF360605004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a32626285aa5361b7b11569faedf909dddeedd208d96194cb87297937cda118. 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/HKG070400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2641699cff2b2856331cb14db58d20fd92ae1d470b2e47770ed2b4c6924b4238. 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/HKG070400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4a45dde9a44a837ad97e5fdcf5f53a6fc2358bf0d7b1ccf19fbce9a706a0d5. 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/HKUM72300379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696a2c76bf3ee8dba121d8e2d49140a938664a2662563b0df25d0f72c915e826. 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/HKUM72300384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3507bd714dc640bf02eac980ad34e9d7ef579c8131368d12b1105553cad996a9. 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/HKUM71500909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd5beb2d96306e9e34551cdaa5b63bd4b1042abf0667717295a304c79d43554. 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/HKUM71500910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67397ab1cf2f42deb215c4d21f8554ceecfbe40f71fb6d0784fbaa9153bba8d. 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/HKUM71500917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229be8080414f18d7287b3aa29d39cf93330ecb19e9d126f1a60268928c057c4. 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/HKG070490024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece6885377f3f7a37da11d639c567649db125d6d44a2a0d6998ce73a03bcffa8. 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/HKG079900363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ecd0b8b35b49a0ffcd83bddea98b2a6c6f415bb786678e61c8e0c79da5786a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG079900364.