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 0x5ca268e64d6c2a3d401b00a9b99839a23314cbc146cf1f8770c348a5d4ede710. 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/ecf59f03-d39e-40b5-acc8-291ca931831f.json and https://artists.proofprofile.net/proofs/artist/ecf59f03-d39e-40b5-acc8-291ca931831f.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 0xe2313d39ab50f0f675fd0f9638d2f2c531ab12804f4560e1ca45fb0785b8d175. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR59R1981548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca668c3bf4843c307e4df92ec604d58340c2b4d63584bb670a0798caed8ec1c. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/FR59R1987922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b69192679e1976f6a9f997a1ce5c878fa7a163a31c174a3d4364971bde8471. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR59R1987926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9141309a15c5fd8d1ba4bbfc60ecad98d16daf386cd2209d345cc07c6139b705. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR59R1987935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2001c839ebee649b90704a0685456075c15308cab5188507331ea9b2af42f1c5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/FR59R1983644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7c977dccfdbbe444b2a0bd8096f89ef1ce5857661aead404e3c5f77b692cd0. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/FR59R1986723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efe619bfaf2831bc3f4d392152e80e5ae72c6745c7ab38b153f582ee78f49ce. 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/FRX201920362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56a1e080ecd492e668ee036feac774e6dc21611269dcd338be821c950048bb6. 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/FRX201920363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3974185cbf5a9fd8d3f39c65a91c0d865d28602815ea13ffc74bc5df2f00ae69. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FRX201920367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8530a3092636a2c9a480e627ae8cbfa570cfc13aafcfa5473c073cfc9cfada15. 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/FRX201920371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa501c8aac515856fc8020da4ea9c41a22a7c33aa44da04bf15bddeca497ccbfd. 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/FR59R1993203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50df996db9a05acf37746be62b2d5dcc729d67716be3fee0627a337f51985a44. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FR59R1993210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ce6ecd1bc6e6d38c86dd518ccd15fb8f6a4c837439539b7c9a9e189be5732f. 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/FR59R1996204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833db16fe9a413e8331377455c26071a766a42a14c78c9ea627fc395b0f40e3e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR59R1996206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4418aea77790d088bc1eea746a5f957aa0848bebc9f45a7e916c8d1f03fe78a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FRX201924494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed32130330bd0cb1573b7d9fe8dae0113558fd0b96fdd1f5610d08942234b42c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/FR96X1929129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3a1ca8f1a8be03db97794bc4af43bba11f011cbe3177099cd80609048d15ab. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FRX452029886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc274f172e7239ffcfffadd53cf3f1c8e97fa491d40826c20950bb7573acda7a9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA062020182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aaffe11efaa0c349e135e48acb50e65483d3d774a6a472aab57b898e4a41619. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/FRX202215305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5063327f78daa27eac4d5462b4252b88734e03291649eb9a1572657e05593f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FRX202215307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685fefecc3675ae14c697dbce046dc1ee7c890406601db1b16ddca74d4522e27. 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/DGA072336438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d1b4ce207770fcbf73e8a7603c9658949264a07f7b6bdd79efe7cf101636a5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DGA082379276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a6ea797e98782cb22f17b6520080708c5036c45195734ae5513f356674f950. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DGA082414241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2132d7486894a0126ca24b6d6c5d66ec7965fc8f0ec4a6686d3a947d4fc80fbc. 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/DGA0M2409115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043c7cac1960233b01f67b620cba22f86786700f1f3c3c3688b4450baa69cd2b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX282566449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55c4351f94d7828fdd1eb22197a789222d65a9d845c9321f2cb0829fa04d615. 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/DGA052593852.