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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177c72a1c7df803d24c80faee6b3d2cad0573d780cc8a3c812f3f7a6257a0b45. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/047ff70c-e0fe-4bdb-b8ab-cf858109e539.json and https://artists.proofprofile.net/proofs/artist/047ff70c-e0fe-4bdb-b8ab-cf858109e539.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1471d56af0cd69684e55da029013ac5e603f34aaba9203a139bd7fca486348. 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/GBCJY2200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fb9a10b2402337e7e1be45a7117cb99926b364f77ba364858070fe3fccecf9. 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/GBCJY2200131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09466fd8c30f148fe0d1e6a7c390d71fe29be86dc732bde60f729be524f0fb4b. 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/GBCJY2200132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a5057abe035634a28cf276e881475d7b8f2cf0d14abe19df530b35eab4ba77. 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/GBCJY2200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc730d19f654bcbce54e45d15693cab26826a4a2670f2925e766d8b2ded6ab7b. 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/GBCJY2200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e9ef6f2b371e33f0f14aba38c405876cc6c33a04709e4f5e6047adad00e554. 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/GBCJY2200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ec5d614c344fd02b71f7fd4f2253f3a08bd2ecdb21da433a7fb9a20c2a48e0. 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/GBCJY2200138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb0d2928d5609b807137e4a4d528a6555b48661965f8e14fc07b1df4b0e4994. 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/GBCJY2200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7514c6c26eb72ab259694552084e510e9890d267f9eb4b27fa62099cca965b1. 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/GBCJY2200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b96ba6d14af5df48c5c87b301c4dff40d774068626fb14928c68c1aef6d2d6. 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/GB2LD2310205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209d59516e2adb294da0217d2c0cd99b5c85f062e61dd1e5f338288757086aba. 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/GBVPL2200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2a34875da1e4d8a7c38c6bf60696847d82038cdbd3709af491f19c86e39bae. 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/GBVPL2100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ac00d101cdd2b7ef99872eb542f37b2671a209069cfdacff84618ac018cfa2. 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/GBVPL2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe59ab367e8f33a910c66c2c07807272a17f2a1627322569f7bb4bc6980116e. 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/GBVPL1900078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796bbed04406eb239b5aa1dfea52a1bab1991dd10465a183591801891fff8b50. 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/GBVPL1900071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fe29625b3144df88a1ff4ea69682882b62760ead60d0d74ef01afb2f401f4e. 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/DEQ021912055.