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 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 0x75cdf9a6952cbfd3178ef75c37dd9bbf6e87e9585ebcd7cbf9a0de4c68c0619f. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9ffe158-9f52-4c97-8414-a31a4273143a.json and https://artists.proofprofile.net/proofs/artist/f9ffe158-9f52-4c97-8414-a31a4273143a.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 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 0xbe4bf0d1efc62bdd473ed546cabb62600a8e6d49efb28bc3e0ecdf453c7607db. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZNWT2373884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df6a5214b9903635dd9b6aa95b7c3816a81aaa5675da82121cd00256382c84e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTAU2361792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb20e0f493127f43bac52192763d9dd8488723759d851b4162db5c2e4bca55ce. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZWFL2327946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb870bdca1846fc8cf1308df236be927c2a99e5edfe716d3f20ea09c3b939e79. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZWFG2402095.
Be Careful What You Wish For (Witchy Witchy Woman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7d5ce025be876abeaeefe441ea4923fb1b412d7fb59d5041291e7cb6e0c5f9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES52545951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e137d1886c8da8fd57d2795656f6c5a707d8adf2f860ace80caac2178cd347a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEM2562490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a2dfcab6af1aad2f87b33920b97a90e497e651626e1fa472b75b201ceeacd4. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZPLS2579152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4116b79461edaa3bc73be0907840a27bb2f87afa9015045aea34464e78c3a784. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZTB32580230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b0efc66d3c5ec87193ce463d35b765189d36bfc17ab153a33d6911952bf6a9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTB62550099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dec8cfa7617a7b58ef253ac249028e1e4916a8b5bd1e4e181fe9c32f4a8dcb0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZTB62590052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450b16a0851f52a9d0e08932d12896561d8040c66d1a51728c8478942eb49c0d. 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/QZWFQ2599089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd948391935293d4c100a56d3e824542eb9373d3d5c06141b7a1bf03d810494ee. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ7M2556772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe234c974005cefca7b28be9ab604aac93651525dd9f7e75af20f24aa27e5bf06. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QT3F32521778.