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 0xcdd8348bfdf9ee6ed03c85b5a718565200bc0e5cdcb03071b16bc901ab811bd5. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/381b4b2b-2d54-4231-b1ff-b2785e1068e1.json and https://artists.proofprofile.net/proofs/artist/381b4b2b-2d54-4231-b1ff-b2785e1068e1.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 0x034dc08d7fc0bc964afbcd8811c94a680cc9e109b26977f93b441f8b3ad005d2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZES62589383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ee3a6edcc4cafb8cae972509f500aecc88d76f0e57cc92f624413e3c81aed8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES62583712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57e658535d35e1d70b548185e99584025bf89e11196ab3f7a83eb4ce3fd0ff4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES72559743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ee0e55ab52e144e68e4bbe39b2abb7932976415b25118a2aabc5180523de5d. 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/QZES72554012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7ef6cf12216516b89e2afa64820abd6b659d8a96c48878f71a962ac6984c47. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:30:47Z), 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/QZES72562184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdee80adf3ad91536dfe00c1e7443b088db99f8405bc0214b1ffc753348106cd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN62564526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a8601d1e51b0b66736b8185c1b857b353ee4c18dd2f1c316de3d0bbe37303a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN92517105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3482538524c4ee96fbb285ef1d53afdf486891d4b541320659e405207ff59ccb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNB2550869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd7f7e780c3748bfd29c01a40af86710780cd02da8f85a8942a697066798b4a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZHNC2537851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf9ab9ed8a22bbde08670884693f4e714a6f788b8de43bf3cc8b1bce9008701. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6F2507048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248c389aacab3dc90d74a667be3ed7820327d7008616aad193494026e5cc0f75. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZMEN2584368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc532375beb1b8ad996ac0a65235fd080d0c7a34f01437e38cc2ee41e8c7c6c7c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:57:46Z), 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/QZTBE2570445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baa641de3db34f79ca23e55d41363fd178ba467d013aec3794ff9c70c1300f9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFH2586860.