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 0xb5f892d61fdc582b9e15ebbfe024f714e0264e202389c14d99536155dc1446cb. 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/c2cbf444-8531-43a9-90ff-b1335f32381e.json and https://artists.proofprofile.net/proofs/artist/c2cbf444-8531-43a9-90ff-b1335f32381e.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 0x651bfdfe9f68e6538b8c4468f76c66b5914317cb1388959032242716ac76168b. 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/USE831580900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e8b9727103592dea84ee7350ecf48dd06b72a51d6c50565c8a369904d2070a. 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/USE831580901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8650da6f7cf678e715457c68514a76dbd21f0071fb347f68043f70b16ddd3e2b. 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/USE831580902.
Uwa​!​! So Temperate♫ (From "Undertale")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa3a3c1a0c25680daf642b62333c43ae27d6238f75b56e954a630c77e392db1. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/USE831580903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc810d6df45063c1cd477b09f786cfd79d4b1358b3898bda3b3e1a570dc36535c. 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/USE831580904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc675e61190b159a80e786a0f2b54a869597bd999561451d6cf615b20f34ce8ab. 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/USE831580905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa615acd6418e84f9527c0c8797671363dbd163098f2edcc75079018002250245. 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/USE831580906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1f7a8eba45d78b04661abdf531f3f3b6bcc165d23e2c46fe2bacb11a1a85ed. 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/USE831580907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ad29b835353fdb22e9cd63e74def2f0f6314a6007b044089301043652ee4d7. 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/USE831580908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d428eaac56d4d4f31f02bb16aed8a555577a22fef8b2b723a2d43169acc35a9. 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/USE831580909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2097f880116fff8f4c1ca7c89b82e9372e7f275eb22f3efedaee83b77d0f8e. 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/USE831580910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f10164452d64af62e0fb0742aa60af5a093d06a44bf6ec8641453e899731bb. 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/USE831580911.
Battle Against a True Hero (From "Undertale")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34d091d4e26234b3c1d1ce82ab6a5b62353f581c694475c635a0659a9fffc99. 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/USE831580912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda380da5b2e33579c38f2e80b768843c3551531a0bc471534b7a430b4ecd2e6. 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/USE831580913.
Straight from the Underground (From "Undertale")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7409ecffca782606d2e17636ff2e6c399c78913110578c558120cbfb0a2cffaa. 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/USE831580914.
Collecting Junk with Temmie (From "Undertale")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3d759990fddd720751337961876f9206676fccf8ab708489f5e0639f6194dd. 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/USE831580915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1c75f284c01a40d2dd88cf9d29eccc4e06f2ef6d0da5c21eb70342099bb8eb. 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/USE831580916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f22517b1e6616187b726b84b222813f623ace2fee48438073fa395e9e704bb5. 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/USE831580917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfcaea6496cc10c2a7feefe193e52e3b31567ddbe724d7c30e78b7313dabc32. 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/USE831580918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cad09c1f50fb1b0879a26f4d0f4da704da35cb4261ae6207e6c92cbf53c0cb. 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/USE831580919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6035088e495aa13aa2076d0570b12f0c87e2d67d1576a9353c8214c79cfac152. 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/USE831580920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29623f2463958019a2ca8eb6d8d5fefafeedfb19959273067271a68d9c585b67. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USE831580921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c44b3361831af6e623a96656ee4790bee7f2ae72d5581f4ab7e62821fcf5b7. 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/USE831580922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb419ceefdacaa0b2f82dcb6a6370c78321d6e8a061ade120ee40efd72d15af0a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USE831580923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e14e6f2cb49f053993c57164e167c2b505ee2449f1a4ad97eeb3ce91064c2ce. 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/USE831580924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e062d4d01feb871a173096f060e760b37fd4f4e4c77ce96d5d417e398df130. 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/USE831580925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b08e890b25d25f43ea13af367626679361db1f4d95115db01dd349f34c4739. 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/USE831580926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b3e314c9e62d603d5bdf87622a3c81f9a76e3c8364a11a216e38da0510e472. 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/USE831580927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bde3ccc98644b64775f1e2f4af1a93810f09480eba328a32f2406d6bac9136a. 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/USE831580928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b66866e296a1cd2be1d350307a806bb5c9b18490a9778d92b25760a099f9cc9. 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/USE831580929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2eeeac1831bf969cdd32c7cf083732160a9f3b48dabcd9187193df55516095. 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/USE831580930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a3d084f29fefcdaa66b5762c9a640104330ba8fb4329f748c83c2d25ef9eb2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USE831580931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca720b51156853b63927eb3774f682404b0bd0481d259c7da8dae7394073a7b4. 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/USE831580932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f599ea9201e3c8b9c7a055942a114cb7554bb3c0a532e2157714b093c74beee. 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/USE831580933.