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 0xfbd834cab6d93c840c1f3b5801b65f17793d0164114a93863a4bde666af996ee. 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/a75a983c-b241-4648-a6e5-3e72149561c8.json and https://artists.proofprofile.net/proofs/artist/a75a983c-b241-4648-a6e5-3e72149561c8.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 0x0b2e8fc6c0c3be69e05b462fb4001521ba05e9eb28e67c289337b11a1a1e3bc1. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZES72236741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d4acf1d668de347cbb0e6d6630dfd97a6734e75703b6a39ecb78a2179629b7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZES72236742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a5eece6915349cbc9b015962ef3c43652737b87679d9d063af97b0ed1e490c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZES72232890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3590d05876ab654cb2a2cfb485cfc632ae18a132958008f6b6647eaab991f89. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6K2297404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940a4f5ac5a5ed1d53020bd6e170452b64175983b2acbbee1dc3148e3f5b5907. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6K2297410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2180f7a8d6d5b2a8002d3c171f3a3e17a3b7844f9e3556431493aeaefbada19. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6K2297412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5875b8a01eba89179cc456151a0fec3ac1d53731ae6d2094e2e2d6739fdeb27e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:54:22Z), 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/QZNWT2239439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200d36121f1861f8c991e54d107756ea77d48c156e4dc9f47baf3fc87cee9646. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZNWW2223886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1eccf434d4c41af30171dcb47c0ccab7a82c890e124535d7beeb055b1daa806. 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/QZNWW2223887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19c70f0d28e907377f52dd7ae7194e9ef2dfd4ea3232516965d22dcc7bb8c60. 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/QZNWW2223889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4946b63f2aa622c225f6f62f31b62e4d5b8500b22edb173a4847c09f5f2ea48c. 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/QZPLS2247622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1bd92962b394ab0fd78e119596f2fe9689190d823860453f1977fc44fe313f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFYY2396143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ec5944dbc854895de3c034d95d7f6e5e95ab58e2ed885f2674a66b84fb537b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTAU2373249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa9eee36baa4e58e587a82215077ad3b9b3ca0e7421e49c14a627734b7f96f0. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZWFN2310584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33b19ac995f3de3efe66c29e321f190a453f2d8949fd433634e7723c22d8db5. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:38:48Z), 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/QZFYY2401784.