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 0x2906e3392537ad36a91b446936ee1802adb9561c8da7f689dba9bc201acb762c. 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/7c5ce32c-515b-40fa-be24-021043da95a6.json and https://artists.proofprofile.net/proofs/artist/7c5ce32c-515b-40fa-be24-021043da95a6.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 0x66a99d0b1964e6136ef7bdd02f510bfb4e0991c44a0568f8bd89650a27cecf10. 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/GBJX31960042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5352bc37cbc47124d78848120b5019f31b90d28133387ffd7e620a08db3e41. 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/GBKQU2387779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaedd28dfaa209096ad1e251ee097dd054577475ceb89a235a7eafc1fda17359. 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/GBKQU2387782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dc708a8f2de6d2c66735cc9b5747a6e040215c4111504b4b647dc8097e4620. 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/GBKQU2494161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a002918329e5f6d8e5499aa95c72e55d2b4c9383c0fe780b9498955852bf25. 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/GBKQU2494162.
Sounds of Life: Tech House Collection, Vol. 63
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cde0358bd8fca452b9864b4afe51b697a530c9e15f2d6c7091569fbec66f23c. 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/GBLV62408956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46e7daa702677db438fac31bf1c0169080e5d488d95a818fce530f890047e1e. 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/GBLV62408957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c44c6156de3e11d77f0cc7b9fe79020caec6fb52558ed02351bd038a7596f78. 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/GBKQU2526438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9e2c88f9deacab61af9210193623ddaab4d6a21ab04205eedb494597919039. 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/GBLV62403267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c847e9c61d6a191eb9d19d6a1c0e8eef835108006aa6b31f0f695e842342a8. 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/GBLV62403268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fb23edcbce92da1a5b4c2341b91f174575794e48a2b452d4131480c2ecf47e. 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/GBLV62309255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df8385f3d122073ddc4de9234628a533d6ea6937d501b69af50621be70e20ce. 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/GBJX33720227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5d7a4dbe9e5b46bead8ab6c6156e6c9c3a3f4d6c0d08318ba259de81790a57. 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/GBJX33720228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaedd28dfaa209096ad1e251ee097dd054577475ceb89a235a7eafc1fda17359. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU2387782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca569847ef3fe8973b2ce156cb78ce51039150e84e60103afb464e8c1cb4991. 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/GBKQU2384178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e7911fb7f65696e13a8f1363c0e28a69d19b860e701dc3745d24e47e749962. 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/GBKQU2384179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1daf478dd56570794db685e12fdd2e4c7b9256020d143018af84988c3279987. 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/GBJX32152516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68af7d68f1bfe8a2018579ef5cc8c07e24875191f4e42bcbeb8fd8a6d87149ed. 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/GBKQU2194126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3da9510e9a3e0ab5e1bf4b4502d86430f61e8492db3852fd4595e0f6a7b20ed. 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/GBKQU2530467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e8128c42a294858e692f5fe4eefe67fc78e35b77eddc94340b71957e7a06a6. 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/GBKQU2455883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6274d3314a0923236216658d8837f28c9fe6efb6c131c9c275b557e183bdb0. 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/GBKQU2088856.