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 0xaa6d77840907fdbed047d24c35ddb5fca78c4399ba0c08f2f257077fdb7c4b79. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e43f66b2-6a4f-4d98-87dc-e11b7f32b0a3.json and https://artists.proofprofile.net/proofs/artist/e43f66b2-6a4f-4d98-87dc-e11b7f32b0a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hawaiian Masterpieces Ukulele & Guitar - Soothing Hawaiian Music Guitar Ukulele with the Sound of Waves -
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 0x608e9de0384b1ffac7d47ff9640ed1868f2eaeefc4e6a999c95a98997160183e. 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/TCJPP2118327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f38bfaecefd14ed9fd9dcb67fbb69f1e9f59b9b44bc4671f44d41b672743ba. 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/TCJPP2118329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7816d1ac07af06f6a1aeb0397054ad061bfdd5c8273990eb48a0a505e8d80b35. 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/TCJPP2118330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcfb22b92bb9d75e2911d59b1b36b65481eb0104c42baf5f9caa509036cdbc2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCJPP2118331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c4f59525515d2ec47784b1acd669cd43288b777224a337c219f255eb22cfea. 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/TCJPP2118332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49675e7d7650c48596533a1a47832aaf299eb78d241601419109775fc063fac1. 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/TCJPP2118336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f435a3f611c08df5b634fe8f22a38b5f38491c2bc70d9afc17747ea720f0dc. 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/TCJPP2118338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24a4343da0c0a6405702c6e682ad28907c7faa6fd76a99457292297873a60a1. 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/TCJPP2118339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc8e868a670331d73d3defd6ba8fbd4edb2abd788714753c6e7b1da94d993e2. 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/TCJPP2118343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa856f3b0709e4adb10899c4954f15b8e96f8be44decb87c1e5980ec5ecac57ef. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCJPP2118347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0485c747fa390ee788477d0346ba0de9a9ccd31737b266026779e91ec9d0fb25. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:00:47Z), 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/TCJPP2118337.
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 0xc2bc4dcdfd7bef5d6ef192f7fdcbb8a1fb3470a1e5f491a2ae5bc3495fd0d2dd. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCJPP2118325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e3ab32307821e248acf36d0d304d27ba963b1b1c9615eedd6ad88ea0518605. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TCJPP2118326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ae3e5decd8cd9a225da6c076d036144f4d0d7f2d7cdd3f3581c2251615df5f. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/TCJPP2118328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a78b5178b6611cf159dbe71dea0f10ab3d6f6f0274f81dd01bb5309250be0fc. 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/TCJPP2118335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad89f5d9e8f04444ae99e3d08b97ce41c4f88963d2f950cd5e8c3418cf46012b. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TCJPP2118340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98355544a9539cfac1f28e29e5824f95a8d19f9bc9668ecbda76713285be083b. 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/TCJPP2118341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df26f7be0c501304377616370da0751e5b99a9fc851fbd0b48167a0ae044793. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCJPP2118344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7ca72ac870b3731ac2c3baabb58c29773a42af1e19cbabe01a8c7cbeb7abc0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCJPP2118346.
Hawaiian Music Masterpieces - Healing Hawaiian Music with the Sound of Hawaiian Waves -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64113fc5e2742634a07176166ef8867f9adc718f7e216c23a8bd8b5262898458. 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/TCJPP2116708.