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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e65a556cfd1ee45ca95bbe2190bcef2eeae25cdb566c932c65cc2f7ccb6b7d4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a809ac1-1e42-469b-a735-c76c3081b645.json and https://artists.proofprofile.net/proofs/artist/0a809ac1-1e42-469b-a735-c76c3081b645.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2403d08afec83248162ceccfd930910274a2b547cd7e6516bd4c223ac6d7d7. 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/USANG2193323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54748efd5570f2cbb30df2772fb293fa5fa245f5a806696c8203b45070cc452. 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/USANG2193357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb70258dd1c435c50392fb360b36b3e477fb9263bf0e23d6dcbccf70f95a565. 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/USANG2193369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67625e73181663cc47f15e688de17212694f2d3ba27438aa54964fc68a22b61e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2193405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a99c4597b0b91968016202b4148e8fef0d5fbe0e05d3944160b9514361c3ef. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2193408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabff4c0a984792f83ae6a7c226e76b02152afce7ad6bc9a0bf3faea2f3554d7. 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/SEYOK1927116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd6d3897a9d697f223cb87767ae0dd72b510f18f669e6a341181f9e4fa47b9a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEYOK1927134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73f0a6c8cc8297f37535201d1533bfc28b5e5cc2362903be7e72c4f608872b2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US3DF2481746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc43abd222960a38e22e78af63aac369277710a4433b1393e81aaf4b606a63fb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USANG2254593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67625e73181663cc47f15e688de17212694f2d3ba27438aa54964fc68a22b61e. 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/USANG2193405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81035eb5149b7f5992daf0fb75400fd8209cb89be0e67e6e0cc9e90677f29235. 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/US3DF2076713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde048e50c5306b46d5d8aa61cea5de906b3338913cf0ba697c4c73202f5f4ca3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2076714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a4bd58091d9f499a686f4cfd2fedd8e85ede91c6d7919a96f8f5410b911402. 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/US3DF2076725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06b6c1dab001ca41ba8fa6fed320953ae4253b6e090d017cfd545e7c68a5324. 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/US3DF2076753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1be1e4e1e5fe55305783867d3e68510dd6e86e914a64db65a472980a0ebcfea. 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/US3DF2076754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b32bc7c1f17547ac6ee071bfd367eab8062a5e98d854916278cce6aa9c4620b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2076756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1903ea1f45a208600a4aa889e902c218c0acd5c1a7ca45fbe9b343f69fc42ff3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2076761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abf9c8798031979321d44dad7ee2883f358126f0e9c553c870cfa35c3cf92aa. 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/US3DF2076774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a238512dc60b3ea2c0588bd814044b1014a9b93d89dfd5d4429ef75d17bef4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US3DF2076775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe926e4419a7f8a86c7fbfd689eee8b00e1e4e680876e5cb573ae6f76ace2524b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US3DF2077753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cabc87e11016a6f61e0ebca382a0856b76ca1e454a742dda57f0906da9ecec8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US3DF2077763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08627cb1e834578c820581735b2b0f91b1cf2158ef8aeeddbb0d544a566febd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2077765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bbcd297127afc9b3af7b8793a620e72e1a50632c5fa08939b15aa827afa195. 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/SEYOK1844783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab755a271413c5eb2b447360b6bdd9152fcb3fd88650cb1bd4c64e04d660a6f. 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/SEYOK1844790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5869c8b656515563e2de079463c8e26dbf026b6e1d80c15d8aa535516059bd. 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/SEYOK1844813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd3afd03dd091ed6fb02baadef6c0d17a59837dc00ce2e95473b1743b2f98d1. 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/SEYOK1844832.