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 0xe629203d17388651846e8c7b63ff923e101be5e89ffa995fadbe614ec9b0e4e9. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c22d1c63-6bdc-4a80-af11-77d7c5a5f08f.json and https://artists.proofprofile.net/proofs/artist/c22d1c63-6bdc-4a80-af11-77d7c5a5f08f.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 0x475b854c128d3177ff5cb5282170458088659ffa5976a9340628a80e7cc249d9. 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/BEX231009308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf68ca08a194fc1eb7e18c62dea038e5b2a382301cf6edbc2a8c276d260e6c96. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BEX231009302.
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 0x88fa57f91e568f371ea52c509765da4c83cca73651c542f95cf0a3b85af6d19d. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BEX231009301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8349dd7325de62744d2e82ce74a4ccfe0331e1226da31a49cb7717cb4e3ea23b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BEX231009310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae783993db480b505f88be58c2f1904f13eaa4ff48dad55c24970dea3c370164. 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/BEW631614502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b96d3f7e35e120e4f0672d5e5fe3e0603961dff8989f34aee0f29dcddfe6dc7. 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/BEW631614504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85834887287179b990517ed2ede765dcbe80b3546f9cf25ca9ae7741b8da1914. 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/BEW631614506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6b3a83a799d8966c74479de08992a110edbec948f7ce3a2982a2f18401c68b. 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/BEW631614508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dfe7d76d56d95524e5fed5df7e380de61fd186beeac7e56b6b41e2f46f8dcf. 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/BEW631614512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878cf4cb2f1deacceb362b91791a9483cee6d53db9a83305bfd44f5eae53eb88. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BEW631614501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cc060704f1f9bb9ec6ca8186c03d37a4e098b1f2e1fadbe1391687764f6896. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/BEW631614505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e89b56bc64f954fbcd26a70cb3cdd663c18982e08dc4c1fc61fac6f2d10262. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BEW631614509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb627220d38d8ac86e6a57f3285021e72f58a149d26827296e0c989c72d9eefd. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BEW631614510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad3d3c660845da03185a1ce86c28066e4a3009e86b1e4fb05b7daaf16e302e4. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BEW631614511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d11526ef0bd8139ee4f987686eac95ceedabf65c70e3d65d11bb179d87dba1. 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/BEX230706906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8739c26688bd60b3a334cfdc7e63a2811b6e02088f4f04451fcc68fada327776. 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/BEX230706907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8a117c62f7ae94173a1723107073aff8d2e6cbb86c1b2dda1b1ec92fbad05d. 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/BEX230706908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa841c48c38441908610a6552878bf369e6015575f1a9d94f59cccdf7bcfd9e4d. 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/BEX230706910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb9e87622e7475ded801b0f7d4b18c107ae2f6c183cff9a19c7955e5fce1b87. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BEX230706901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6319c265495d3f7d9346865147830163a6035c4bf7c3ccb006804720a421f517. 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/BEX230706902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3814f1ee679d3d074ee6e7ad973a4d227b75d0009131d3adaf14902732934e5a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BEX230706903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d32004e47f8aa841f58bd5a69dd85a6f1b2186f6255ea42839b38b959c19e7. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BEX230706909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c137ee8a02c7175b71e26176a8bfd6f485fed185211bb36f3e6e30794e88247. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BEX230706911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22755deb0c118d445d4b7af510614a30917fa043fc3476dfc2c26b61ed1dd031. 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/BEW630601602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1665c8299e120b2e4333c12ef5dcb138017237bbcc2fb05d7a1f97429aa0cfb5. 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/BEW630601606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34869ccc860a7e025a4608c0e2a17390915643e257c2d9819777d7faf119166d. 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/BEW630601608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf67f9b2854d1d628d16b11e243a25b4a77e8e9c389a4cd5d23558ac7f17e010. 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/BEW630601611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d1a284164af523600a78c49e01a7444aa117fc0ba53c9ef82b7652ef941b6a. 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/BEW630601613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b9022410b225f21423aefea90e682d4ca6130be6b17a5d127f2075cf8aa780. 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/BEW630601614.