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 0xf2ef63554f111aa8509f83f28fd46e709df648763c1b732606f4d8224c67ac2a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a28ac672-f1c6-4e5b-aab6-03e5e8fbde7b.json and https://artists.proofprofile.net/proofs/artist/a28ac672-f1c6-4e5b-aab6-03e5e8fbde7b.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 0x5db82a19b4011c7cd07ef4b75c6db1cb1cdd4459a7bf8c199c71f55824792108. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:31:28Z), 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/QZDPF1811158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a5f9b756b034bbb20aebbe7b3038162ff2874c11d82647caf16dee7f6909e7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDPF1811157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fd4baedc91d1c5129232ba299c907116a6900869a8a8981392ad96ec05b093. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDPF1811159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a63702ebd46cb3b0871d96b7ffde2026ffcb0375b9f25c6cf183b1f6bdae4b. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZDPF1811165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05e973dc1c8223e8177ba5b36214cd863988f0cbfa830445a960f47ef86678d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDPF1811162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd3b95f800bfd0c7c255502b6d3791573c0875b49ec70b771228637c1d56aa8. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZDPF1811161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73739b5d91c2b009fe273d654ccbe77ddfa1f75f351bcb45b0380d92b48fe341. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZDPF1811160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf3ba32ecfb0679b2cf7798e651c8775b7a2a7aea987d109fe92d919ce18e57. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZDPF1811164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb731f1d9750095fd0e443b1d16239b3e46c2a8aa03614ae79a2b603d82656a0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDPF1811163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1444916c0d0efbc6dd79f56acafb55cdc83ee5c9cc570a5c57f38e3bac5e25c0. 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/QZDPF1811167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1093ec3f29552cd5f0553bc63675b8fed33a07aa7af2de6b2816a3ef8efed1c. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:35:01Z), 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/QZDPF1811169.