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 0xd60729a2712049299275f391ffb34be3ebcd5886df703338900420e089dcca80. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0a98b59-c392-498d-a984-1be0d653b071.json and https://artists.proofprofile.net/proofs/artist/e0a98b59-c392-498d-a984-1be0d653b071.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 0x217df3f4dd23368ac9dbd17fff03a56eb17dd5b173a3a060dde46f28d7a55dc3. 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/ARHXW2000598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f0f48df0ed00f7975f050fcfe847f25990914626534049f4f86023d4a315bb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ARHXW2000600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71477e8842471d4ab8a430bf8131341d5da37c5c013e8242225faa6e68aa5735. 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/ARHXW2000599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79323e593d94bdb50179d0fd352f1d86d16a2ff85b51a7e54fc5caf0085d04a7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ARHXW2000601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339f741dae22a6aaaba49a1b67ca3cfc7be9bc48fb10b6b616d1ed535d53e132. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ARHXW2000602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5a2045faec82e691e5b8aa8782bca2e1f7119e455ea8b2f653ec159624a020. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/ARHXW2000603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43730e55128807353a746e0e392f33d05aa5d8792235589520ac9289f16dd33. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ARHXW2000605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351cf3b23d8fc9e2918a794f1d2f0703c2152af5ec19f0d399ef8bf0eb56b81a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ARHXW2000606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaef0c2f15ea4b002f72f41836e35f75566c5a43e24b94d15e22a1db7ef1a759. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ARHXW2000604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedcece3155ebe40e37e37eb12677068508b4fdc365371311f55190d2fcfc692. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/ARHXW2000607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc00a79227ef94383e1f4a6e26549dac2ff21a2d3dafb52b9e67d7e6c4522c01. 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/ARHXW2000349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc417f8373cb1c6c525b6bb26c3f827d770f889c23c16d0f5c14370334a8bb887. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ARHXW2000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e2ad25dbfab31ddad7a0ac36331ddfdb42824a6dccb17623923c67630288c1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ARHXW2000351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e340d396dbb7f58e8e79d6ff21170debb900ef06dbcaf61171ae721813fd19. 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/ARHXW2000352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd674b9962f8bdc12613eee361d1fc95c6d6703db19fa07f8cf5e8293861b517e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ARHXW2000353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde07ff30ede34f493c358b2ba2838de504e2b8170864554b80115379c8766442. 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/ARHXW2000355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2794835bc7c0f6a83cbe0e2c28fc3bd9d9a7869612465981fd847b08b8c88a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ARHXW2000354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb757149ec349ff8ec743d05effa8808133c78a8ccd9e6e6a689136c4a3843af. 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/ARGDD2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a149530aa543ee203a21f466539bd813a485b3417df8570f31c907ad9f25d2. 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/ARGDD2200002.