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 0x9968d700ab68956da2db3e3e6944954832a1749064d2658658ab062404c422f7. 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/4af8d132-c786-4a70-ad88-93a49fd47846.json and https://artists.proofprofile.net/proofs/artist/4af8d132-c786-4a70-ad88-93a49fd47846.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 0x9b250e8d340e52e78a45af360db47e9e76cd00e27b711526519e3eaa99ab7ad5. 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/TWU711601462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353b9499e1db269542ee6670a5f5db9132b46efddfd5355df7c0c37b2e6d4f4b. 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/TWU711601463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c86c2d60636d9880fd7f6de5942c8491d6e980e5d471d03b8ba87b923b22c9. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/TWU711601466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59af3e539197e8fca655e301001976bed97abcc89d966253a706b576120e7153. 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/TWA271207008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc74d5ef41ddf4083e405b66ce0d42963dc22a3e4c630636532ecff0de60c8d. 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/TWA271207004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583dcdcce8c96ad5c92388da14727df5b55f5ae99f75c20ae95244585cc76d14. 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/TWA271207009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c89af5691b5f43d44f6180bdf42a3f4a5409c5066b514bb7443d69bc042b2d2. 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/TWA271207002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a514d9bb477a4c897e980d5c310b9d25ac0ca0a981cb95d7137d9d20d67290. 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/TWA271207012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90202d65ad63ed423332de69d295d2e0f03450352bc24df8efaddd7263d9ad4c. 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/TWA270918001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbb364a55dcaf25474ff243e228abf0f48903c514058d811673f59439f26c52. 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/TWA270918002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6bfd2be729a0eb33ae7ee499e20ec172c70a97bbee728e1b53042c79ddb435. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:59:06Z), 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/TWA270918003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dff0b30de1f8af3167d78fed6ade4b01e2ea1aef1208957a886f11aa60de39. 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/TWA270918004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f7649683e4e0ed7691ff2119c5fb900f04dcd604bb5ee29053f75bcd99cb83. 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/TWA270918006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa460f30706c1003349b571621a04bf2ce4ec3ce8996e9ccb80b9a98f4cefe038. 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/TWA270812001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357c88a474087da8f617b775e85a3a9bf5c8d8a500ccd53bc9c62ddc91105e93. 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/TWA270812002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527eed6a7a16d888cf59412a035aa3fb960541d93052ca5f570bc598539d5a5b. 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/TWA270812003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68edfcfd6826179ac31d605a5bf06ce266658616fef9a1c21bf7299c0d4c4e5a. 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/TWA270812004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff2809dff8a801099290953ec256ae19fe48714bde06a397670a9795cc92f16. 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/TWA270812005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21f2659e6db1eb97540cfcaf7775f7d502c10624a0a77cfc5a1b3ce296bc784. 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/TWA270812006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03eb755f519c7ed2e0cf557a14c02031f4cc70c277856203da7f29cf6f156d7. 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/TWA270812007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b2ccdd0faa385fa3423170176e3d039b7fb5bcc50ea3413fcc512dd6ea49d0. 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/TWA270812008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f20e4eddcb8f23ca32e622dd0bcc7847100fe472342f2fb83439e4f94eb41e. 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/TWA270812009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091db06a45064b01a0178d7ecf4d7987e3def92ae3b472a2b54830eb807d0898. 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/FRX452368945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a57761cbd865e5b8d53406e914774482ecbf61f66dc01d3542cf3b249bc46f. 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/FRX452368947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80daafa13a4240e66003675d02dd48d9917da43477e812b530c9f02061f94c37. 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/TWCG52099739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f8917d196268c9abf5e4f095b2b6de4b7ec8c90691ebc3496b77d6160073e4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRX452085575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a57901a474ef3e2349b94dba845f7cdc0437e5a25b7187d072319d67e76e62. 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/HKG732289271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f919f40b54b0ba8408837a38eaabb9d0b6377c0d27eeb229dc33acacc8d3030. 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/TWU711300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eadb170522b2d055366be22e9f2698afd650a02c03ee8ba44a977fdc46b1682. 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/TWU711300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57728bc1f6c45a18585062d5638f3c355d936102fdff2b51d064376f55d2c2d. 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/TWU711300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11f90321e9dddd3a8cf2d908852be47908bc594706dd54f599f69d98f9393a4. 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/TWA210160001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bae288d10c3c1341cd440901ecdaa7b36a6d4ad62dcce33856cfb783d1694e. 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/TWA210160002.