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 0x8abd56a62cbf17ffc9ff74acdebef97b63e48af8a8726457c85fff7c1333517d. 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/31728550-8e57-46f0-a0ea-8f3b9e4be65d.json and https://artists.proofprofile.net/proofs/artist/31728550-8e57-46f0-a0ea-8f3b9e4be65d.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 0x8512a144eba86d1d3f7f61e61fab29508e4fd27b972886ae311015d85c48ab92. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:03:55Z), 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/TCAHF2331000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ef85eb0d5980ea62ccd8dbc47db5947f2002f2f5894ad144980482e09e4d08. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCAHF2331012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78bb4784be39a7c2e7773cf4d1ec605a3d68ad427f23701d9b91dc11138cbbb. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/TCAHF2359601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7d3d2915a79a4759fd05b28a896d5dd763f5520453ef1cbabb2e834db223c0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAHF2359616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c41e504238aca4ee1be3d77748cc48d471c2bc3dab909b97df1c191d8194bc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAHF2359619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abb852e359c980106bb3dd8381ee4a6250f2c614913c66412fb3a1cbb49580f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:09:17Z), 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/TCAHF2359641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dcf418f35b04e1d6d149dc50ffecd26fad28afd43f8ecf40c9e1f2c36189f0. 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/USHNR2435501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef978814ae5429534b74465823fbcaa8da9c36f45f27d8c844fe867e3566579. 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/USHNR2435502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796eaf828d0bf30e2c7f1213c6f7bd66f730b7b63dc829f4a33623371b47f63a. 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/USHNR2435504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7611a95269e4a63d8502060dd828059c0fb525737ed479b818a7d2cce253aeb4. 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/USHNR2435506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d030f4e7a22640f470121e76ab3605508f4f6f28f3631877d856bd7ef01a7e0. 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/USHNR2435509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab6ce6fcb82dae3353b8e72e2f3694ef701c3f32f8dbecd738d8b5084ccf6e5. 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/USHNR2435510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d49491d1ef045ed8eddc7feb709b188d5c55177a76b4767d4704a212343c06f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USHNR2435503.
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 0xbad3df613a925a62af9406747feb2b81503385171b0d08e68ff07c56bae9494c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USHNR2435505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf397e79f5d1579526a765d42b9d9e5ae7daf2462d39ccb08e8cb57ff893021c. 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/USHNR2435507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4519c6db8132ea38e27e77d45322d235b016288a7386bb5af52646e40137e98. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USHNR2435508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0031e4142555bd219011f38f0afc838be6b05440abc043394f8866f6838cbd0d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USHNR2435511.
Three Views of a Secret / Goodbye Pork Pie Hat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e235a05099fa93aca21ae6f0952ddd8d87afa533d5ef5a51f94934f541249c0. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USHNR2435512.