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 0x5f6edeb3ae84828359031a551763a5e2a9d37545fa9088f783ab4ed349475cef. 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/fbe71bbd-0ea1-4094-9529-76be8253ffd6.json and https://artists.proofprofile.net/proofs/artist/fbe71bbd-0ea1-4094-9529-76be8253ffd6.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 0x2d7c81edabba3e8324e23f0dc832696c459e5a4f7795ba08d5e9bddaa1bc49a7. 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/GX8KD2209726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720183df8f97ea53996e66c96432d093b8dfdcc63191d506ef3ccd6ff0b2edb3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEN2416125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26e17c2a31019c7e326ac50fbce85a57fac062a5e6c536fcd274818c79b68eb. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:06:02Z), 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/QZZ772423717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f283737bade77dc6f8da8dd9ff38ba43eebae7b10d8d2d8450ded47d259721. 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/QZWFX2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e3e9bca117314a58e5051aa640ee7c54be16de722eb5579cb9eed23d598714. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFN2461463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2411b3f80c4c90b40a73f5ee562dcf8f7e676a8625e759163f9f1fa40db87b12. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:27:45Z), 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/USANG2429021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289b7dab17f4a737b637830336380843edab26a2d8fc8dcdc26fd87bc281bf93. 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/QZMEP2485433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9033fd3b22356e2d94834749a1d3fd9d9bc781d60f6d76eaff4463d0a322a5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZMEP2485430.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2565be118dc9d685489e4a13ea623631e09b6f8b6e60f87e9ecbd3bfdc5235f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZMEP2485431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232f698ec5fbd749a88d0bd90cfbf565f704009401c204d459c253415783d60a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMEP2426439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e2b672b5b56637389a2aad97bc86a8ade23e6bddcb6ee34e74554fe2aa785d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZMEP2420683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1474d48ed43b1c775eac859c159f1affefbc7cc4e7701eb2cc280a22caf7550f. 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/QZES62482490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec75aa4a55a20de7c09c33e6372ea9c312cbb5f3f41d86c3eefd097577a5661. 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/QZDA62497078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb585315e6c40afacc91ea652e416c1d4da70b9f74c8636ff8fb47e74750d37d7. 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/QZDA62453690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1a9f58b16666b98c9d9e46e07e81573275483903301de119db943ab892e4fb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA62453691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91bfae38f4b0d2973905637b180375dbfe16fa9e8b8656912ceb5a92428260d. 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/QZDA62453692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40c47cb4480a4e697d267a640d4a8140a947cc8d743f29390e3c9048ef64b46. 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/QZDA62453693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d0d97a9634444035049a15d56178819818d1ceb3a34f22c21131bbe6a6405f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:14:38Z), 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/QZDA62441919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038d72365eac46cd47eac7620adae1f0fb141434773f01570c14024671fe1078. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2375332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbca89277d4bcefd6ac4074bff28bcece46d68b5015becf0d69a882adc71186. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKQU2367292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f01da57f86c5505da813cdafab17d5bce93440475d3d266274dde48159c29a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB8KE2320182.