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 0x7541b3fb46a1d0eb4cb65d4d6454cad23f16b5f4d019df39a53107a3c31645ee. 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/23f6e9be-4047-4124-b185-c81112fd77e0.json and https://artists.proofprofile.net/proofs/artist/23f6e9be-4047-4124-b185-c81112fd77e0.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 0x69bc033f639a0d38457447aa5c750fe447ae770b0545f44d636888745290721c. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZTVM2487323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb42735aac09488790a690c7511dc038eebd1ed81ca1b71e4bfafb81384f6a16. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZNJX2418519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc014ac8d9f4bb45f76858a72a456aee021c46eda796112d8ab324622d25245ed. 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/QZNJV2410629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7544df1efada58becc228d48f3b2cf10a08844ddd72df67ef66dc9beba5a9e. 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/QZTVM2391362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8149d35ceb0b180ef0c546cf23f6db6ab405d1a7e5d52784d4aec1a8e30d0b5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZNJY2341801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26ede371d0c477261d249a8416830efa18719b7fc4f88a6f1693b97c847167b. 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/QZNJX2418570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8257af8226adb998402837df470bf6ea5e657d1028c5bf3b71062e7c400723f. 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/QZW9K2397957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10306f2a67de4ca3ec14ba2e6724242287ee2538a5b9f198856f4808f9301e12. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZNJV2351001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba6b3f6078c4cc624c6dc4d41aca826a7f9afc61dd56773a04d5f1d8bf8153b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZNJX2429306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef0f2507dad318c227c26ce140c197fc64e1c9fa96a317f7a17283674d00726. 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/QZDA72385923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac0abdaebde93cce023475a9733db4e569d574fef71ee67c8e43d7ce2499230. 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/IELOI2274227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b08aa2fe9a8912f067617e0f0be0bcde6093f04686a614e73a4427247ca3058. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/IELOI2269841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7be707ba4883c664f845993bd4e8b61e02a03cf83bdefd29c41e5faceeb888. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IELOI2269342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c01fbb8cae3e3a8cea0779abd429d7aa53554c6033e0132a9f20dd00830bbfd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9K2398043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056861cc48f647545e64e52a4204b0af9e4b80bf46efc866476e2032b08b79f5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUBEC2080503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03464a4909c931424d70319b4bbdac58517dfa0fe849456b53a48b2898c494a2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/IELOI2270363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf080cd37a056a4070d6e43f40fa94a899e7c1b7d1538360107dd1e5571653458. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB2364089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda303f13dc6e3bcfbbe68584bd24f75971543a55f9bc86ebdc5552a13fe3b5e1. 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/IELOI2270139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a980fc5cf9f4598cdac3518d93516d06b1263bdc6c57dda3aa9b049c00438ae. 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/QZNJX2429309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dd8d729e07dd4dd5f5d708dd8ec887f7d04a77d12365fd75cd537d3ac45f52. 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/IELOI2270375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385c3a27f2b33b10bc64ba50bfa322ff1ff2a77f18dcd43e4a85a7a1b200f6db. 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/IELOI2270152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e22b673577a26aa3f1d834c664e75af5abf252c5b41098217a34f6f41f586b9. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/IELOI2270371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdb501abdf1b334e012311c93015ec0a179f7999c11cf1b0cfa7dddfbaf5232. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/IELOI2274216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927d0e0f32c76686e092a876bc6f17af05cd8af00209c0a73285cacc0cd0233b. 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/IELOI2270361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f3d13b33919fa5f0faa9b5fc0721dc70ba504558cc30ec339bbf417486533e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IELOI2270203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc1f1c2060ae83f1b9e7eca41949e2085ea6daf4352e02e9fea5f2af1a811e7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/IELOI2269383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba53bac7804e2a2decceabac65e2d3bedac717549a6d33d6ec2cc8995c06dad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZA41S1806317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f92a7228b3d2b285d302fe5a132a773b7a3385c6c6542e71b71f7d3b7e377aa. 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/ZA41S1806320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12728c6c5fe0fe7a3fcb0b43762a30a42634809407d4e02d823d9c5dfe3c3eb1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZA41S1806318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6708ab756ee6c1885829ec337fde9f5359debc02ddf5cbe99117cbe9d1e6b7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/IELOI2270141.