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 0x89a107ccaf3087589510f3ea229f6566bd2e2769ff33e33fe73e94afc16822fb. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5569e52-c912-4b98-8954-1060776d44fe.json and https://artists.proofprofile.net/proofs/artist/b5569e52-c912-4b98-8954-1060776d44fe.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 0x5e105016d809d5dabfe2267dd0eaa68c4f44fdbe29da0b4137d4598ba5aa6729. 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/HKG731697924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6144c31619edc64308a23c8e40bbec75ef74bf94cf86b4d1cca69ab9985e0e3f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:42:16Z), 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/HKG731697932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855978e123ed8f46425e5cef673e9101b1acfc0faa3fbbba7083a18cb6f43eb2. 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/HKG731697933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f71eca328938f7628c1c67242b44a9261e1b810bfd3c6ec7c6b592519a6f651. 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/HKG732467341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c8bb7979930ccc589b4b49ad1545ae0b041c9fbfa76ba73c47844bea68f2dd. 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/HKG732467344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d854a5ca00809094926a7bae14f83c646bf82dca97894d3f93f81c3d5c4caa3. 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/HKG732467345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad24758954204fe24a7ec7fa904d98f94f0661acd954defe7fc291ab6b817cd. 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/HKE022380001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edf3f5412a8e77ed99f6bedffdf81719244b630528b2c9e10994929be7bc835. 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/HKE022380004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe12107cf5ece066f55cda3e0d36d4998f5f4592e7b8d29d548949bc6ffaf23. 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/HKE022380006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9068e5b00cd0b7189e428c5d67b0698f774013b16e3852a3440330f2c7ebb7e4. 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/HKE022380009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269798faba8ea6c790aaa5aab2236828bfcaaa32741fe157e69370aabfd2c5ef. 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/HKE022380012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d943fc7ecabc86900c01009fc0563e2de5d4b892b0a4385f086f66ebc0ac2bd. 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/HKE022380013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c82c07905c7b5b6ee0fe179909b4e5f17988179c6e774a9dd22f40604d1abdb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKE022380010.
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 0xce71650a083ff887266114e25127854f47c613585e24e16de6b2655d330f4a67. 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/HKG731401820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a91a8f91e6ea446af44fd03c9f6b024f779796dee0b99b3960963517916c63b. 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/QZJPM2485100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1985d5a0f0530261e7c9be66b2e2477db40ae41f400b0943283f2e1a6f3b17a9. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/HKG732460640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b62fcba819fe9fd87969b5b2b6f0976afbf0ccde54ee734ab36e98303036d21. 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/CNZ682400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e12d097577c70d22a9c0336b1d52bcc984eee056203a274f07e2611fc04139. 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/QT3T42419412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e444731bb5b033a8e0f6b5138389512b2601934e6679ca750d8f887d477eec9. 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/QT3T42419410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1504e36c015d8008f240de93cb140cce8bd34e215ca616be262b985c215f3a0. 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/QT3T42419408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad2060f305230bcb6c884b054099ce28898e5c4be27f3e8111b4c0ac1683dcf. 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/QT3T42419406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c96b64d161f8b120924721f926aeb733c8e8ae39eb10c915edfaafc7ae75677. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QT3T42419407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db8e98d0489186565a15dd5ce663cd8d315b96f568384e732f8574da6f8f46e. 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/HKG731401875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356d2d1f8f6c5c80d0c823c13150a6df4a2bc3e85d6437eab55bf10b790909af. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/HKG731401874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe664e8a4e97b87e80d2d63528a4c385a7cb620ed9f569ba0d452a8d6b2864099. 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/HKC992325983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a62549565279fcbfe81ccb290cec82b7ddab179745af76c867c74b133dc773a. 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/DGA0L2346491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6513455eb1cb8e342f93191ad4976e8bd9833380f1e64596148bad513514ca03. 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/HKG732499140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5474e8097d1b1329ebef6b2ed135f321b0719d420a7f9f8a8ce0542e278be8fe. 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/HKG732499142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb862b37fd9d5835af30874e8db1812c44c65bd3cbea8f01878c222e679fa6cb. 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/HKG732499145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8ec4a575a0c5bc3217130f27f539641ef6b477852e7bc2f73e75ad22d8304a. 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/HKG732499147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c8f7ee7c7c316e2791be6cfe8901f8db990b43dfbbe6cf3a8aeafa90547021. 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/HKG732499151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc380b8959ffa5355aa7efe62513f8dddd0b258a44b5f73a4d5cd23fcc813f2ab. 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/HKG732499153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ea301a4a20d4a090da7e5d3d2ce93d433d17587b57e9e34a5406acc794b930. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HKG732499144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3d95ce05506097b987f13f9a8e9bb1ad7883c9d8f8e9a0e1f0a3298957e254. 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/HKG731401590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884551d6577e56af5d5454b48189e87ca01247622c38c68d1da847a6a54614f7. 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/HKG731401591.