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 0x6ed0a74313604b23f0c010a4cf9249a3ce0048b000d99ce45e8675f8bf4202e6. 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/48d7c0f2-5fb5-499b-95d5-c305db302e51.json and https://artists.proofprofile.net/proofs/artist/48d7c0f2-5fb5-499b-95d5-c305db302e51.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 0xe1c9983d11fa5ae2a876bbb6261b9c56a5ba20be577bdd04d122d27839b5a21c. 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/GBMA21825100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9bffcac5cc4945318d5e15533d62a5811d4241de15451bf437221601324d5a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GBMA21825094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b20e1fb99d443d1e334a4acbe95123c7ce1b7bf971b6c822794d07d640540a7. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBMA21825097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb2f59107538c2d4179b77917730a492cf8592ddd21abe1655499eb8f01ea66. 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/GBMA21825102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7bac56569e5b080491677975e4131c23f4f943b4a3c8d62a8d143d1e84f470. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/GX3Q92170026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719981116027cebb8801da5e5aa30846a7dac71274fec3824303328b6a8f4300. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/ES16E2200443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed0b2c537c8e8e56272ecd601305c88a0f55689b7bbfc3d574997747d4f10af. 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/ES16E2200477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d30f51387ed980411f373da82de450c0a04acce6ac3e4cc12057a4b7ce9d52f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ES16E2300579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed86624913b964f91e1aff44311c3ba9b308b4dae64cef6ce91f4567769b27fb. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ES16E2300618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca6b3df01436f3ca23e491cf0bf9fbe69ac530f317bc38486bcac67f4fd32ac. 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/ES16E2300619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68db745552688e5215a857a0e3dbb922aed0a4ff6f1f2bf8dd18b21e2d8bf6e4. 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/QZW9K2418660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b10f4697152b1e1392ec1752f9deb5e073e5640cb85729e33c684c9166347a. 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/QZW9L2403103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae04c0fe3a752bc790718f9a9f1cec7989bba6a799fc42f4c51a9f49e41ca25. 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/QZGLM2569455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b10f4697152b1e1392ec1752f9deb5e073e5640cb85729e33c684c9166347a. 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/QZW9L2403103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26075511d910886be16a27c95eabca732993395b94cf463f44a6659c2004db9. 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/QZGLM2569456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d736e13971b73495a346ae0eaf351448345869d542ef31a75797b81272cb07. 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/QZGLM2569457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332cd3ef1980fd38dad6deb289cbc6fcfd76d5c66d5e63230c524d410a3b58a8. 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/QZGLM2569458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb985e15b3fcfb0b0ed4526180011a6eefb1bcb242565e9e1981d3c8bc1efbbfc. 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/QZGLM2569459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb9ca4da4bc860778e1717aab9b939e4aca31b1eba245cb227ae9cbf1493207. 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/QZGLM2569460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a7bd2a5db88086d54e1de1b6e18e493429bb6305ec15bb5c37422c48cc3a25. 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/QZGLM2569461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6504d90a0a9e1b1adcb8055444f5c03fbf1b2e4d47bfeb8e60f96492683b77e. 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/QZGLM2569463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb969d40761289f9d92dca50107543b5f05ca7d39a95a248302b52af5a2a77ce. 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/QZGLM2569464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9670ec08dae7352ad770d03870ae0f93e403c8e625f57dc659a79274172840f. 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/QZGLM2569465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68db745552688e5215a857a0e3dbb922aed0a4ff6f1f2bf8dd18b21e2d8bf6e4. 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/QZW9K2418660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf0e008c91396105c64a81d4af15460cface34fd5a27fbd75a510d81232e08d. 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/QZGLM2569466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828016b272911d5ac3a82443d2a34e5b77552f075cd79d663bd383996b6f52b7. 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/US7VG2553854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953e8cb3651a3a5c1b2734de99fa777ec82a5aee6e56e89ab502bec05b01f4a1. 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/QZGLM2569467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5623eeb953b6f051a397b0bd04accff105e435b8c5af63c9cf40564585f96e17. 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/QZGLS2259941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557193437ae7266c91194c3c7b87e4b0d8292eda862e66c3475bc48482eef646. 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/ES16E2100231.