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 0xcb433d777c86643221ef6ec18b8791d284719bcca95fd5bd3cf22d7b68a35f17. 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/a22e26dc-c0e2-4a7d-a4f3-4c09eb714218.json and https://artists.proofprofile.net/proofs/artist/a22e26dc-c0e2-4a7d-a4f3-4c09eb714218.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 0xb2c6a71973ea48800bb1b68204f17376d603ccf7a1618ad5d597dd25f60e9ba5. 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/QM3DF2200633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9b7fa8ec0e12cc151c5fba30543e8c36040c917a7087ea1910b22b4579aff2. 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/GX4R52331111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89e3e3f416f88b711e3707a1c6f35b77966e467ed6eab21d5552dc664f28ed5. 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/QZTV32492380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fbf3e270ea7eb8826ce2a939ab45967c2d5107a65ef3353f4efd4d34a757c6. 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/GX38U2338979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2306cef9bbc409c27354e98058a129e5a0b840d558821983d8e52d67b88171b4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZS632359461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8aa43d1bd2bcb81bdf7a5200013c5aaa09ccf3f63f136b9fb3e37bc64d28918. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2358988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd6c1e59805d25e449bdd676e6d7801cc669204a70a13f91a6572103f086129. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM42K2369190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b0eca63ddf8155cbec981eda02f35c79985974e4afe77058f124d9dbf60a96. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX8LE2315952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1b87b3122a0b8847dc2b3f29e6415c5817d018e0154c069ce53156d30c25d2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMHP2366263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9b7151bb5bb50bc196b5e11f27226da08974c6981746609c7cf491f820a190. 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/USLZJ2374766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991bf9720d13ac2319a7a96dd98365468191ec0d5c0748328ef1f35627663ca6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USLZJ2374757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb25b4ea58d0b4d03bb331cfa001c1d6ca2cba96f350a924992d1fb45928ce98. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZS642306978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab437c240078866a12c2f66069a74a5dd8020c8136a20987bdf05dae1584179. 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/IEWER2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb76e513a8e9de6625857f8a58bcb3d62017a94dc66a1c84dcb3a10c36f4ca88. 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/GX8KD2376136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7283edf7c0130c1dd6e4095c169a92529ab1bd6fc0a0caeaccc7bfa27f8fb4b. 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/GXBDT2448272.