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 0x50abb99d9ffad1a2f14f820dc1260fd69ba55abd378712b31b1142481c12be18. 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/9a05c0d1-f4ec-46f3-bcc6-a5c77fa1881e.json and https://artists.proofprofile.net/proofs/artist/9a05c0d1-f4ec-46f3-bcc6-a5c77fa1881e.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 0xd89617f6b2407bb4232558630defcbfd2bb5845788b286ed3ac58c4b9dd7c007. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/BRMKP0400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a76e3ed0a26643c76405353f5767c9adcc7b7ee6a490976ace95c4673ed54be. 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/BRMKP0400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1169c033d3983953bdce122f7c8b6c99416a3c88026377a5ea1b2ce2d51dfd3. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/BRMKP0400278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f1ff4ffae64427605dd5ffb7c40b5c22e12aae764a7553a98ed6eb6c6ec508. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BRMKP0400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd8a814d2f3b278e540596d241a3bfcdf56ddc80a0ddbd4057a29de00f112ea. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BRMKP0400281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8cbb11736c56d079ae2620c0228a567c1ee7f86bef1b4b5efd4f7e2e4cec0c. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/BRMKP0400282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa836c958764bf1824dcd17e042f92b783e6849f36548b2016f84d1caf5bddb86. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRMKP0400283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb0fccdc6951cca905d74b6b836df751deeee6a786bf43c150f5b6884effa74. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRMKP0400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5266f82c15cee1cf18904fe71cec9ffbce36b2481909469ab0db0cfc5a7a237b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BRMKP0400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca519f7984c92673c142b37d4ee472020bd5a780e5c7f77a6f7f0733e186333. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/BRMKP0400286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdac24ba4cb4e4aa150487c9342ba8a987c64bf1e7c63aa1248d8ae4a667406f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BRMKP0400287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5c8c09d354e0fc12e8d14627ed39f32babd58aef9a435c79e7895d423e335a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRMKP0400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694bf4cc74c3aac8ef19918574c0f04bdb5cf0b0f1d18ce07c36f72cf1846162. 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/BRMKP0400289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3996b393de6764497e9e853b9aefe42d91c119a739062e79e96dffaaa429d9ae. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRMKP0301290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7ee336676b2f40d435901fab5217082d642bc8d8b628140769b78aac5c8e26. 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/BRMKP0301291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d439d6e1f6588390e7ba47b719cf71847806819c41ae59db2ac16da72387f6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRMKP0301292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7ab163a1893689fc220925b406ac2852504d40294a447e7db04dadfe49cf9c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRMKP0301293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092d49f9caeff344f072e89389f361fc6d77a93da2b26b25a63ba32f4fd45184. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRMKP0301294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75016923d8ed7861633d66599b385468f725c53591851a15fe4826250ace197. 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/BRMKP0301301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb3e79f8b72704295618ea308fb6601b95f852d19a090620dd799b1c6cadf21. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/BRMKP0300997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71fd43928b3b02e853021d1c564e1f36f6dcd7af5dad46dd4e885effc3b132e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGH1981862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00aa9b223a207db646da56eecbeed1457cb7447a466d9890f0cb780286c46fe. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRA1A2400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c20ac98e97009d87c5a62b14061725fab8e96a33a08ab69485a2d37042bdfe. 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/BRMKP0300400.