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 0x4613f5f594248e516c9adf69bfd4bd676c565bdb648cf920d445c8ad25b17d72. 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/1bcd765c-9a1c-4ebd-9557-c68cdc510fbf.json and https://artists.proofprofile.net/proofs/artist/1bcd765c-9a1c-4ebd-9557-c68cdc510fbf.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 0x16bec834f3b335174ff56e59919de95ee55cec67adadc49878654d0ca70ab265. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZMEM2163299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1d44061d61d20a9dcc91e37bb4ede3c0b140debfe639a01765f02dc84c6ea9. 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/QZMEM2163308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ef6d0a9a8169024cdaada4307b80afd0c77ea1158ebc41b31bdc22d6be93a2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEM2163309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6f6cbad36b1ca97b663bd3142e0a6c12082171146d4f558c442d0ca6b9a2cd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWX2146953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59813e7f96f09bfe4a53d92873559ea6810152aab0ea79372fef29d5c1748417. 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/QZNWX2146954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc464358e874f7c8d2d55f458c1f90650909160007e3b416de2235a38b0684b95. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTAS2145433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed323a1351e019a84fe69c114932ce7632409638733b237d7b332519b0491ba. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZTAS2145434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15aa48dad288e66cebed2c65657fc34fa78ad86fcc252f5c13a8c4dfa23a019b. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZTAS2145437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b914786c98a842ddd4bd9151ea0ed97cfb3ee847f5a5a81b19f2ba2a932bd2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA72219102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af283653747d7e4f4426599a57133a46f0bb8b7556fc0de6b07bbb47bcb3330. 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/QZHN82201024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9903b7dd356090b4f47106ddb099668d63b2ad92257c5e7c2b3d5b5da2ccf7. 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/QZMER2280871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c77dd814a94761abd132cdd19ee3ec9d7b73fac7fd35e563ff4f4dc86ee6fa. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWX2206255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b08c86cb8dd93a68af16a27966f025cb1acd6475ed034bdda3468d47b237718. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QZES52494313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf972c377e49d78f971442121f5b3b8fd312ef1a599fb80a85a41b2b2b74f584b. 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/QZTAW2273112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e733b635204c2a2743f47069d5a09bff8c3e5785a5a2fe92324d94918cd51dc. 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/QZFZ42395192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e60824ddc09bc748946dae4656a8b9f50f6030d7b8f4313b44a7cf54f74a588. 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/QZTAX2337933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2af1810d6b2d837a4ca92bf1a38a88af2d493fa97ee9867b8a750d2fff1ff3. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/QZTAS2432337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70b2ff33cf1737088812dc12b6b3ea3423ebb4f0fea146fd6b71cbb1eb2c446. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTAS2432338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6825cd71ab30f5d5fd1cb53285cbd42ae9bcd73fb603a5569f300d6fcbef423. 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/QZTAS2432339.
My Hair Is Falling Out - 2021_legacy_mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40ad148dfc11ecd7c05806891706c66a5fcf2e528c10183dac267f2966b6f3b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZTAY2471080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c994a1b4e848b774ce3774eece4e10664edc543f1075dcfc21f065e2a087d2. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZTAY2471081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a973b7388273e7bdf151512363b0593321ab94e48826060e09eec77d6c68095. 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/QZTAY2471082.
Let This Eagle Eat My Liver - 2018_legacy_mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b226766f8f4014a0fd38230f85ca39c1803773cab288bc0eea480513337a5e8. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/QZTAY2471083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5d309ef98c6edb62deeda9ca91fc55bf55a02a4604ca156dc4832c0180411f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZZ7L2491236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682d8b1593ce31515880f51b4030faa1cdcd37237b675d9b4f6390c6253ea3e2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTBA2577159.