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 0x56c87f3aecfc5445a5eaa8bd56e1309c6e0aa39329f86424fa511a992fb854fc. 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/71e83869-2293-47cb-b714-267d1834c8e5.json and https://artists.proofprofile.net/proofs/artist/71e83869-2293-47cb-b714-267d1834c8e5.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 0xc345b984ad8958fc976ddc55a42bc19b0e3f3d22e01cb94ee392596e74024caf. 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/USAT21400522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c65f5d2cf839f436dbf1e351e07a6294a30c0bd2659000f6e74872e5a68a853. 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/USUYG1085431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a1abd6245a2f045f1d6053936150c9fe97a10f7be2e412547fb6194c4da4cb. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USUYG1085433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e36db2b3fbde3035550f94149bd6e6c2036968f70a98d4ef841a73e0d16fa3. 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/USUYG1085448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ac017526ba35efd3b7157240bfcf524c7c6076c14acaa8cedf693ee206a3fd. 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/USUYG1131381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e75453452b231a1ce6eb341cd4ed7d628f117708fd9b69bc726930311ae15e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USUYG1131385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf696fa30678b364af92db1a1fcfd5e4530b221d22d0418f582be3af4a355de. 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/USUYG1159208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1f8d6a88120a8dec7d3a2fdb271d85fe565e999c4166ee527c897f73295766. 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/USUYG1158877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc47f243940b508f6626240063d4cf67c411f1352069397c1d9d954d9484824. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USUYG1158878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ef6e84c0637ba5a032aedf1223c92e0197d39358795dff7acfea982edd8d61. 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/USUYG1158879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f1febc7216b61fa3c8be7ffaae7d880cad8cf4fffdf2102d0d88d32a771a92. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USUYG1158880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2818a160a7206b8bd245ae6a165390b9cd6add77e45b14c3a1203af3e98596e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USUYG1158881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d1229494e800f27af3aae7334590eb5a249b3b5ed0b9e40418abf46d256a61. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/USUYG1158882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbe6174cf33516131b4dde6ccce68ddecfc420483d0742afef4ef99c05d6938. 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/NLRD51966022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce64fbc41eb136923728cb0480a10566ae085d11569a639ce89a4b2b1f5bcf4e. 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/NLRD51966023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b06e3cb77555fffb43ba3436380c316385d2c609ebc8f0273735aebd41a5567. 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/NLRD51966024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa51aba5aeb8a9ed9d80c9568fb6d692087aef2d8d8502c64fd4bb55831ee9c. 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/NLRD51966025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f130100fd9df3e9c2a4eabf3fbcdcdcec7210a6f85e661b388b7f9c1a457bc. 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/NLRD51966026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab6f8669766b58b8de7774553a60ef6c06be2d1676878ccb32420137de64b65. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/NLRD51966027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fecd056b3adafdd7d59532437307ae71124ab22a3e1cddf2cf78732db5f6aad. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/NLRD51966028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e42833cab309e8be771c321376f46af3cf5449c8a3f9adb07d9895ee66c013d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLRD51966029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb69b39cea8807453a31e86eb3e8be6fc5912bfe6315c22447ffb91ec379a819. 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/NLRD51966032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902e366d15b99bb28170cf5428b2431cdeb9b2fb4c98fb279fa0d8e2391c1679. 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/QM6N21433230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f600b8616131738c0a8a4b8ad720ff9c3bba643c1bc05c69ac2202618aec53. 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/QZ67M1804324.