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 0x48499ba21be80a9a82f758d9241a2fd8d46c71e27d9906ad9f8e0ad67046056b. 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/1fae2a75-6737-4e5e-b59f-1b3f8cd94f42.json and https://artists.proofprofile.net/proofs/artist/1fae2a75-6737-4e5e-b59f-1b3f8cd94f42.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 0x1b55fec9c27a5c39bce40ea63a2f951e81c07422e0878442c3a2d135014c0fa6. 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/BKNDN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1eb762a9aae126fd3eacae330dc0457f58050a860e8b708bd975609f8643c39. 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/BKNDN2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524dc202981720ea10588bad77f161db0c35fce7f1b623c523767d25690bed1b. 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/BKNDN2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4d84fd2272209e5b5a72bc792452ebac396a341cf7834fedd98d96e59c9340. 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/BKNDN2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fb1b85df991c562b3fbab928e220cae306cde101ba3d2861c12019e406125a. 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/BKNDN2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db21795b739928dd8f6689a37e4c42d1014f933d373b62632435964ad3a18ee. 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/BKNDN2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5307e54c2b35c7fea09fbb6abe07a56980460e66c85d35f9b9f039179189a2ac. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKNDN2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea85541947012dc9bcd6d233ace2c8525e31e55ec47dc68af502bccb802ad1f7. 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/BKNDN2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29aba9b9841640a148d6e5d0d7e0f9db5e07482de196fddc62e922f9fd90fb71. 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/BKNDN2400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09794a6174d9418498e51e8cc294ec3202f19ba09890fa6c3c472efb9d91e657. 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/BKNDN2400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47025517b82b919f40b5a324fe7a0f71456f65c8b8a5d01436216807689e8849. 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/BKNDN2400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61d9038f6f21253b1a473900dee6b709657dfc4730b15c285d92796dd412840. 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/BKNDN2400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa14a67857889ab048329534e2b23c22de4dec2bb13e2c2c632f3100e8e42d99. 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/BKNDN2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff7cb0f807eab7593ca7229d9dfdd2d15749009e7b5c895883cfada94217da7. 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/BKNDN2400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5577570588a17921753f8ded97a5dcf7d7c2b9c6683d5cc2257eb30360629d. 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/BKNDN2400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7abbfb4821572cff10341c63f562bce00c41062a644e3541b1775c657c26a43. 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/BKNDN2400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbfbac0ffb3340598d44c4885fbfcf2b6eda72aa382bfde839fdbb7c59e2984. 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/BKNDN2400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ef58d43ed1cc003e498c7da18a757b2c07f853b66b68658423b84d876d30c9. 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/BRRGE2301026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8138e280263f312017b05833c9e0db41a08c008ae416a183996f6a8ec0c77c8b. 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/BKXX62400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd724293c8fdc9b8dd639050ecbd9e33b02b75f537fba7d3e7b678309b89e501e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BC6P42200029.