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 0xba5b77b1d377d53e4bf3c8cdd6490277bba89001c486897cc8601e46e8241de2. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97d95e21-5081-468e-a3f0-031e460e71d1.json and https://artists.proofprofile.net/proofs/artist/97d95e21-5081-468e-a3f0-031e460e71d1.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 0x92fc1c698ac11070de37b7701a1bcb5098d44741a67da0157433fb95dc20027b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZTB22411685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda71e5e4277b799b4bbdb677709e49260cc218f0c736622d1474f990e935875e. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTB22419385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d422fec2ab19e132ec2f3770bf1557f599328756eef93792b43baa96c8f74f7. 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/QZTB22487421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9bd134cc5f62a0a6d608dcfc9f106f0d3e469310a825f58b213db07f2afe9d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTB22411682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e3a0c1cebc381411daf9cf632748f73a4bd4c906ae85604d9a1b16483f3ae8. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:42:53Z), 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/QZTB22433255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0427111e9348e05b02102ca53bcd2ec59fbaddd31b02a2b9ef89207e1d587141. 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/QZWFV2459367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa270f98aad00a4d5fc8c4d41e8a01ea7b02e24077a9d7f23368375bd01f3ca0b. 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/QZWFV2433906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea76db90b6ecc3564bcda2f151c2de53dae67cb89e57b73d9c86dae11be519be. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWFV2434408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3c7f03270f355efc9b3a098af91478d8209a1a22ed15b54e5a2b4d01edb72a. 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/QZWFV2434407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd443e0c989de6ae5c5b7d2cdecf60d7647c80945e2dc637890de18d1b16a0e6. 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/QZWFV2434399.