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 0x41a1848358a2ab361b73b4167b67f26d7d27d31bb5a86314826d8cfa57a2bbb1. 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/08f2dea2-2090-4f5f-9630-84d9e580bcff.json and https://artists.proofprofile.net/proofs/artist/08f2dea2-2090-4f5f-9630-84d9e580bcff.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 0x4a82c7255b448242741204ba02ed990e337e9aa2ba6a61446ab8455e2e6a1964. 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/GBWUL1801084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6479f2b738af1f3999a66467086970cc19c164cbebe790049d7090abb03b73fc. 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/CAF5R2000115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fba5768fd5fec9753bc6b87dfb07a8e38b9d1ca4b857ebaa2a3fe9a326d0a0. 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/CAF5R2000116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3de013aa46307d02da9af1f84ae5f7a01397c4c59bff541e525cfcd987a918d. 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/GBWUL1935572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31b5308e6ece90bfb0e8d3e3f74c409f6e922c2e0d4cb6c754b4ccb5c5cd2d3. 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/CAF5R2000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc792375c04f134b5d0867c6e60d8cedacd4461fea19a24ba0630aed42104663. 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/TCACA1495572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e58ff0e2784addb4509fd550f8f1fa68825520794f1dc87f0989708db6dbbd. 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/TCACA1495577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2bd6b17174da8561ed5188fe09e2472cb16f32af1a627800ad69e7be3f915b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCACA1495580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b3fe1e3b176ab873c6f814c24cbccb2a1d73974637d3ebca0032448b3987d6. 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/TCACA1495630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838a3e68aecc13c398d08cab1830b2e5c7dbba24f6c93e43435d04cca4271ead. 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/TCACA1495634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a42c05f92dc69e74b12025bfdd0bcdbcad1e23e93d85542468e6331599cc68. 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/TCACA1495637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8f2167b9f8e6bb748f3acc4b4466d6e42dbbbbba47fad9c0aff42db1ff49c2. 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/TCACA1495640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a493d77e50d1a18c89ce221d650bd1c0ddb2ee669c43cb98c4612e04caa41c. 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/TCACA1495646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f6a6394244e4d6a22286babb3cad29c8266d202a7e96145df157a69a2ac555. 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/TCACA1495648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf815e98f4052bbe197dc1c3a2e3ac79c3b8511c7eca6aa688b13074578b85d. 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/TCACA1495653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a9471362e81327bbbed9bc0ec2a0dd20b09c71591cdb77020208445d0a25d9. 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/TCACJ1594622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d6fe11e92bb2d1a33538f21714dd382f3941674cf4301d0b5d8c472b04cb5d. 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/TCACJ1594623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48f969173783557b4bb6e0ec8bfc044a24d3cbb55693410e9c3d2e70c7efd7f. 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/TCACJ1594656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ec7a2305e07e61f1a0997482bdea3ed68217f9b9528a55edd0575a746c4a2f. 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/TCACJ1594667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e78155649974eadfc07fa141ef08642690931c35222042e1da641d80f65f003. 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/TCACJ1594671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015f87d19a9d707d4ab07ed7a4ee5471707d443b1e91a9996e67ff8bcdbb013a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCACJ1594681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931fdadf8eb543b86a8c6594615d95fb42d692560533b539eaf42b7bb7820643. 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/TCACJ1594684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2711b97969aa4dbaf13e3da6ab934410c8ac598993407ef144d07cddfe6f096. 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/TCACJ1594685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8235fd78806bb9ea64e90dfa5806575991482ac9d1f51bafe773c608fc753e. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:00:08Z), 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/TCACJ1594621.
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 0x048107536b0f5a264bd059f7cd86365d58778b48218201be8a703d5b58f877da. 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/TCACD1536784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81d72deee6fcf292660a3f960f6c5f82b66e944ed8a24c929a548dedf5f6d75. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/TCACD1536789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7245328f37cd9b238b074ded96cd348c57ae1d53dbf3afb0aaaad4b8c2346cd0. 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/TCACD1536792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f25f0d8929ffe4b7ccc97f9bc43931b6f32e35eb1e2f7d830fdd1ca6c79ca88. 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/TCACD1536794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885cca3a4afa13886f2ddda3b71d67baf49767d9bb494db486037d0241d85d39. 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/TCACD1536806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23adb87cef4ef600a99ad970b136b9282fb77d84e2ca2bf76300136c03d01447. 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/TCACD1536811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fb4f6f4d92879fcacc29eaae1e2fe7705fa83e410f442f2dc0d1e249a9bbac. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/TCACD1536802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb32810a83523da72febb0f2260dc75b2e5e8507307f7cba609663f872d4375. 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/UKACT1614575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe28435bfd134e3bb24c50b8ffec973f2d59e1044e082a1c86bc7c45b4c3f25. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UKACT1614576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86be660539ebac57ef7ef82770bc77356d8731a3b2fd833a263b62c95c043eb7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UKACT1614577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98757e1674532ba3d2e18f4f7f6ad6754e2deda51f5f73ba54e698d70e1a07d. 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/USUYG1108659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88156d744c680f75574d66e240bc5b4354a63e4805e7ba914600b13decaa177e. 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/QZES82237968.