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 0x4eaee65b7fa0aeb81f86ae4b82a2e3159dd339cc49c3fe9000db39ab5876d6e7. 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/09b5e523-b37a-48e8-936d-0441a3ff1900.json and https://artists.proofprofile.net/proofs/artist/09b5e523-b37a-48e8-936d-0441a3ff1900.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Sounds of Carlsbad Caverns & Guadalupe Mountains
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 0x850cdb5dd17ebde219d2a2c951e02fb5940f49bd6a13b4ec63307b22e5456ff9. 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/US35B0416701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c664f3b1f849cd4c9ff38c9590c294afc4dc39f9786fbd8d3492ae1d530cb4c. 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/US35B0416703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b66b2cf098949c91e15a0fb5eb192c0139eb0fc0d86d4243d6ac42a82aed234. 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/US35B0416704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4d44d2dd2ead727a11cb1d57ebf34cc067a6d748f157799a1e9ab151d51706. 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/US35B0416705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3e3db2c17b33113238d11679abb06018e57e5e3ce792c68e207884ee1aaeb4. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/US35B0416707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed59c0e045259981d69e37953efdacd37971dddfc0bc9a632ace7651e0849c6d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US35B0416708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eab4f9f732ead08969cd5c8256ad2663e16f3676a23a9672a44ebd33566a668. 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/US35B0413501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a3116ed65fa16d0d4ffd37c2d201a6089b12aae54caa5cb8ebec39d2c15416. 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/US35B0413509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcd38f9c56b7b69343d33f3e013e74b88ba5feef342df77a2d48e77279ec0c0. 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/US35B0417101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c378ba852ea1eb904151364d39c5c040de0d7a440fe488590d6ef1241e073d. 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/US35B0417102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac91c49c9d9e52e4f393f35c0a0cb75077c022838cc9a575a0270fa8632525f. 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/US35B0417105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76405589a7f0e495b6d6a52c648030d209837dca17905b869e346f1125b05868. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US35B0417107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922688b101da05cf294e5900c30ae87d3d625faf231ef27d8ac5b758033b9b21. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US35B0416709.
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 0x22f8c5cf0249595527aac1192b81f737fe8b120b1234df572a2ff2297b85c133. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US35B0413503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83352c860e535951ac865dc4e4079b28c4e1aeeda5304cc3cb28c68d6040667f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US35B0413504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f720c4b7ca7c6635932d03a00afc7dba025648d373c442bde5475128ebb345. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US35B0413506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17ce32f0c96dc38a342fb54d665e931211b8c1aaacda0d13ed6e6d03af9bee5. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/US35B0417103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8ee1c16500457648e5d7de3749d121eb3daf126b5495f2570895c7e5b6e67d. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/US35B0417104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10ebeaaae345dee010ded4e00ef47835377dc9b57d69401a6778a70c7b2c679. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/US35B0417108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc37cfe4d8f4ce349459449333f183cf0ef2661855210d018f14422ab9e3165. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US35B0417109.