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 0x270cea431d285552347edc3fa2e8b2b7aed4d333b39b7c24d9b93f40fba975d7. 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/6e459e09-d6b9-4d8d-8015-7cf98f9ac3e8.json and https://artists.proofprofile.net/proofs/artist/6e459e09-d6b9-4d8d-8015-7cf98f9ac3e8.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 0xc6668e72551e8db5d1d33ef0456dab07d29e9c1f6dbe7d76e1a89d03c904831e. 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/AUBEC2530133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a139b652c4ec6eea63b039824a8fa7287c4bdd062a6fed627a03a64419e9c4f. 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/AUBEC2523572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207b3be6bfefa42eaf51dd741c49cf0db586e664389a06c453d7e4ed73092f1d. 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/AUBEC2417995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe8debe6aff0f52225060eb8a83f05fe4d3f183bd1d4b6d45be63cc547cf1f7. 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/AUBEC2366353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa2a6f009d36bfccd134d4a6068817d829bcc25b4508666a361651b4048d15b. 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/AUBEC2530134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba501ab9514c82f9fc50bbaac13f2f6d53a96d86dd5aabe25c43844c3261845. 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/AUBEC2526461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449b37b2b64af7bb0de28a8e61dcdff8559b0fdac36b2888e5b8d052f9ae7535. 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/AUBEC2458053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167598573a26929a209fb5bcbfaa61d6ffdf954c30f5dbad7018ff8446aaa0b3. 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/AUBEC2530135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9364f01656f87afbfb8818ebd699968b3216552f7e83eb3977cf59ec168f91. 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/AUBEC2530136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e248eac7d8b4cf4d825d39abec432f8becc0f7afcfd90c759018c27cd3bd01a. 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/AUBEC2530137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba501ab9514c82f9fc50bbaac13f2f6d53a96d86dd5aabe25c43844c3261845. 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/AUBEC2526461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a139b652c4ec6eea63b039824a8fa7287c4bdd062a6fed627a03a64419e9c4f. 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/AUBEC2523572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe8debe6aff0f52225060eb8a83f05fe4d3f183bd1d4b6d45be63cc547cf1f7. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/AUBEC2366353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207b3be6bfefa42eaf51dd741c49cf0db586e664389a06c453d7e4ed73092f1d. 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/AUBEC2417995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449b37b2b64af7bb0de28a8e61dcdff8559b0fdac36b2888e5b8d052f9ae7535. 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/AUBEC2458053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a139b652c4ec6eea63b039824a8fa7287c4bdd062a6fed627a03a64419e9c4f. 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/AUBEC2523572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe8debe6aff0f52225060eb8a83f05fe4d3f183bd1d4b6d45be63cc547cf1f7. 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/AUBEC2366353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207b3be6bfefa42eaf51dd741c49cf0db586e664389a06c453d7e4ed73092f1d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUBEC2417995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe8debe6aff0f52225060eb8a83f05fe4d3f183bd1d4b6d45be63cc547cf1f7. 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/AUBEC2366353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449b37b2b64af7bb0de28a8e61dcdff8559b0fdac36b2888e5b8d052f9ae7535. 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/AUBEC2458053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207b3be6bfefa42eaf51dd741c49cf0db586e664389a06c453d7e4ed73092f1d. 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/AUBEC2417995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5772b44bb9f0f8ad645f0f0b7f91e3f0925b54d3ea7c3accd4d6e6f0dac630c8. 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/AUMEV2398101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ea1c27a358bfe18cbd16a83609419534614430fa5612bc02fff651c598c3b2. 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/AUMEV2294666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bba3d83c0ac8bbd217bf2f09d0cf6d63f0a6c52e59e4a42d86a3196163405b. 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/AUMEV2236731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf813618a5d5981111efc9b6fe38ef1d567b38ebb0e98cfb4fa959cdb84f74c. 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/AUMEV2183783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6699f82d9375a8092ce5ade6f2ec79fc71568e24ebe57a3bfd45700ef30707. 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/QZK6H2106449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f99d1cb6628bafd433d3baaa31fe44b5ac496cce80ed12e38044ff4f4afa0a. 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/QZES52130190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cfe723eb121f0314cc98742c9c69efa5ea5281b5ca914920749f802a8c3cda. 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/QZNWW2034809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe934651f03064631bdc04ca28a831adc1d561931b01c3a54d42533200494743b. 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/QZES52130191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6cb50dd30535df8bccaa186294901751c40d988ebed45439526fffe3c2f0f0. 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/QZES52130192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b35ad91f824d59ae02f30dd5445896c32e1a3a65bd2c022f58adeafd1730024. 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/QZK6M2011721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f99d1cb6628bafd433d3baaa31fe44b5ac496cce80ed12e38044ff4f4afa0a. 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/QZES52130190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b35ad91f824d59ae02f30dd5445896c32e1a3a65bd2c022f58adeafd1730024. 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/QZK6M2011721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc78f12d5b2641cf045dd5471c2903990c7024a561dc52e9b3b7e31d9347746c. 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/QZFZ52045328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37c8686d2b46bc5a05cfdb1c9b695b710c8eb8208c60c1c6817be1963a7d493. 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/QZFZ61977610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c50ac39521ddbe6c9533aad7d01f2082a5fbef0f35998e98e76903d279912c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZES51907376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f00ff407cb98be9486bce033156a0dfe31abb1ea332ef4146d5e7f7e64b9897. 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/QZDA61856474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bd2946ac1f45563c90e726c67a071f331ed187c4e3319ba9751563ec0a17cb. 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/QZAPG1834471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5966671ae2c19dcf516b8c760c6e42f1d17368dc316086546199138fc790c6c4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZAPG1834472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0965ceaf213abae4b79d2a532dcd7c0e0db3a8cf2bdd12ebceb3ae5fee2b1de2. 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/QZAPG1834473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed113f03946763e25088e8d170ebdf516e5e00ec16c4b91975d9d701aab22281. 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/QZAPG1834474.