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 0x1c5e09d84ed40677e8f3f954e37feb00a8058904f9857c0677271de64f661a31. 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/2c1c9aaa-0e12-4dba-a241-de8e8de5e62a.json and https://artists.proofprofile.net/proofs/artist/2c1c9aaa-0e12-4dba-a241-de8e8de5e62a.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 0xea85946c4bb80415eb49584ca3361390c121ed77656e0696902a0e9f950a052a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QM4TW1993014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe25ad159202db3e59601da5a82115ce45aaf53584f6e9a75552a31c089d7b5. 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/NOW9G1202091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34481f9a79298c5d4e01a26ce15a8b6d46d6b4ad1f1e367c3ea6ae396e2c0bc. 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/NOW9G1202092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563b4095d32b04b7f5572690215e2c46cf76a65da50771c91a1319e6124d0734. 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/NOW9G1202093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b6939430110e51470de4555a922235ff2b1682b4048a0d2b93b5c9cfe182fa. 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/NOW9G1202097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21749d5d37864d1a02a1b27102c100db222f756dee40411c5be6188f85e2fac. 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/NOW9G1201850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc13eaeaded8e790f4b27c0c8600727ff9168a9a092f6dd5354087c38057e58. 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/NOW9G1201860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eca404e31cb6365c667e0d8279f54f5088756ac787f25124bf28e91380c26f2. 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/NOW9G1201880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46e9be2c08806a0976b793072b3fd446aecec0528e2a1b9630ddc410af3fb91. 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/NOW9G1201890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39305df0ff1648cad172da1ac7dc65ca3acc12ae3a91876985748bc62808e4f. 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/NOW9G1201900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e077c067de4cd2510e70b8b2d5c449025a823d8d8b8b2a03202907928bfb0c2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NOW9G1201920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa524ada873978f1ff9bbfe917a9977f4443952075232389aefdd46fd315646cc. 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/NOW9G1202096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf8b2e5b2c8e3deed7f004ec3bd167fa3b2badd50fe0ffc6f2a4730d3624b82. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NOW9G1201370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528a52cee813fcb3517dd540adec63a91b5e346a109e1e7441b29a19badae5f0. 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/NOW9G1201380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0581c29593f31796762d6026adc3bb6edac81dcef328dca76fc07a5fb11ccc00. 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/NOW9G1201390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82ac1655a32e04cb48f7072341509949d4cb6b01b5c5d6c91d53331afad6d8c. 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/NO2PD1102011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2910263a9f66d6b358d3565e4b62d14ca775f09a7925f1b9e51a763abf709549. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NO2PD1102021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1da9fe8376b0c3482c8ef7aceb4be73ee51a9bf113306d200d626e57b4c2733. 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/NO2PD1102031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a3db505719a3cfb3e7de7faf5002a5840508aec474c760693d19ef10d947ce. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:57:35Z), 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/NO2PD1102091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb58b83443d96f82601d632e588f42b3e09e0d7e21a15bc008e93003a7a2c91. 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/NO2PD1102151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68faea832ebea018c1ccfaf0981da3cd07ace36b5212604eeb4ed6756d6d509. 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/NO2PD1102161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69c3d23fb0cf7d726df3cc4c644e0e8a3e23ef0a0eb83c6ab62d37a64bb9db1. 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/QMFME1926316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaacb89e06ac93d4fa82e249bdf7889c05c4115547734605d1184841ba62f03. 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/NO0LQ1701597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa031d20112892f494e3c3243577fc8292bbcd54014898da088ae88a2bab2f8. 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/NO0LQ1601500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf54569feb8507f6e577c4779319007ba0d99e44f688111e3769690ca305dfd. 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/NO0LQ1701578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3c2171d175d71e6ee3732fbfbbf5ad3f37a7f629bf6e46f61e00fdd958fb25. 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/NO2QE1408010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb495b3623a676b19371f2cd4eb4aa8e33fe9d2c24c1a56df44fa3f7b4c21e07. 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/TCACT1637936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91f5a3848afd0531758cde6fc76259c2d4ad6940ae8db74ab17824bd50a389f. 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/TCACT1637943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d086b52554907a431cb9dc0a61c3da5c3d586588894c39fd0c757a318e3fc8f. 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/TCACT1637945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e83b27a74e0980aa32538be29f2ef62595b72a42483ec84053f7f1177e47411. 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/TCACX1706666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec41c3f9e89d1c7758d0e4206bffc6a9e7c2cfa3ea067cc3a074c103c3b45e3. 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/TCADI1734855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29e177ed3e3a35a22458abd806e8696f1660675ed63df5c842cf723ce3fa904. 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/GBLFP1814211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec1a3d06be607a78f94e547f217d836ea48bb790f8183c8a77ee1823693a09b. 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/GBLFP1814218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ebab303bd466372faa98530096b2ea91e71af6c16d890a8b94fb3141c1d2f8. 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/SEVVH1300903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacf3c84c3bcc32ad08d472966b329e3fa7ae0db4d26257608d84eaa7717e863. 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/SEVVH1300915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f05061fa361ea9c40c81d2690db8a778657fc99cae800dca573f9186aab5656. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NO2QE1601010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cb8a11295ed87c4bf06326beb109367352ce27fdddba6b686a3f1eb546caca. 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/TCACM1610158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a27481a67e6d0a90b136a95bae936ecf3fbfc319dee7c875e068f26ff7a1e3. 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/TCACM1610161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a2e18391725cae443276ad5fb868f45758b5393eaaa713cd9186ef21fea48b. 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/NO2QE1305070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd12cb6a91484ffcba0eefabe2650c5009d82cb230ddc2ed013bc0a1324a8361. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:58Z), 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/NO2QE1501010.