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 0x1a4bab84dec2f9cc450ff9761dec9b0bfa646c18fd45933d159687ff9fbf8fd1. 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/26be5d56-7e5e-48c5-83a4-6e070e517e8a.json and https://artists.proofprofile.net/proofs/artist/26be5d56-7e5e-48c5-83a4-6e070e517e8a.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 0x405f8b44b481214d36fb2712c7aa57e62851171469af00239def872f8048d5ab. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/TCAGX2302597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5ae9b7ef22359bd36b2283d445e31cc298844aee6b92e42fd9e4df4a16e26f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAGX2346002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6309c5f98f41422920e8b33f26ce9678e1096d89d58cf9b057563106e7b41e3c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGX2345195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceece0c78540c717e6641de55c7ed31ee724080347bbbebaf87021fc5b057d8d. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:03:28Z), 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/TCAGX2345105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4b546c4fe4cb557d4d58b125d852dbb00999f95ceca410819532366f0d9431. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAGY2337958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317da778e85609dd9b0caca6dda23d7f60fe7ca153919c9d54945c35d1855f5f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGZ2334994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9822cfe4bdf98adf60aa7a71619f2c4084f4656b6873abfad22e4a6ef3945bd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAGZ2336173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8b2930944117ad90818c7026be1ab53dc74d1dc9cb7ca3b584a9428603d04c. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:22Z), 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/TCAGZ2382031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79543e7a6468d828b16a159432cc75b4d854eeb48e15efc1b5c6194250a2dd2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAHD2321581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a33fc3dc8e2ea235702f89a92d9180138873311a0d29a7a565be850817ba944. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHE2304816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955b4752d9de27a6b3e1e57bd8c32d685173edc3c9eb4d6b69cd87880312f4b2. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCAHF2318199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7124991e2ce1efcfb539738a43b5ade3f8f19a0ac88d5bdd0d7e8ac2bbcbd3. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:59:56Z), 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/TCAHJ2398054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee8fe3bf5bd1014bb8cf92287e6b2df1170a11f35ebabc72f15e48f65d76869. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHJ2397686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e886cf80b6831a18947e1d6ad3601f5017d07ea1af2b14c76b459c3418d7b33. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCAHK2304382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dc2f44eb057d7a8e9fc2fc41f38f11d7d459b621aefb1e9c7de0fe1ff4964a. 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/TCAHN2332805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7056ee78908f7d2541712b855b8df9cce3bb303f6d6e243a7a30e91768cf93cb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAHN2332438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d78116ee41e1155dafed0ca72603711d72bd6ec8632b88d8e1b4ccb1de85192. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:24:38Z), 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/TCAIC2460892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f6a1677a8d8c7543b973db0f2763175d799f0f5b3d637096a6c0655db5ccc9. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:33:49Z), 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/TCAIX2430423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb633d2e8c460f15cd079f13b4229b2319c21faecd224401930c311f2cb2cd63b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:31:43Z), 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/TCAJE2559201.