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 0xb99e28fc8f202b3c8d509de906d3b9578ff8ec4b44b1b154c69bee9a1da05c76. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2b16024-7527-4c0e-92c6-ac2f422d6e07.json and https://artists.proofprofile.net/proofs/artist/f2b16024-7527-4c0e-92c6-ac2f422d6e07.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 0xec1f732f03aace673def4de6cbe68fe3f87d6e880ee7852af48fca79c8a1bdb4. 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/SE6XY2209739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b0e0dcadfa4b366a35340da75c27839f25e9d5e193fa76bca79c3e1b8c7e50. 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/SE5BU2006995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9badeb41a4b1a9002531ea423e4bd023445d7c44ac4b800028db3c77d6e1480. 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/SE5752089814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4ba5e9853df3b6476546b87f08c473c342525122528e7f8bb573fab03a2c0c. 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/SE5BU2053653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cb48bdf4aad41c0f07d76136a236b5f1deb3f70630236becb27ed17bb7dd79. 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/SE6QE2338550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1214bd906dc2a7ca60ccf08912abf4203a6aaeee18982ce137f1bfe339f3dfd4. 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/SE6QE2338552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189efef256de2c246da95efe82fa507ac9910d9e1794d18f682bb8df44c282ac. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6I32392376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6261d253e64a0f5ca275c0689bd1a95db3e5ede5ea39c56152b682d5a7c15d. 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/SE6QE2338556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33de999703d64dc309d501e36e3c8a1f0e0094d2d993a6c270699e278fbd6dd. 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/SE5752417312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189efef256de2c246da95efe82fa507ac9910d9e1794d18f682bb8df44c282ac. 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/SE6I32392376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce8504610ff3f7b0c78cfcc0f65dbc82704d321ebea0a969b4a0b418818bd56. 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/SE5752384574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6db203f4564b1e753056b53ee75afb01f8840e80b1ef75c369d4251900c738. 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/SE5752379534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe699dd251f59ae21d30a04f71abd2de40ad1591ea5b80269fdfafa975ba8f8e5. 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/SE5BU2335907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01afd4f208afa8a2e70c42b45e5567a4a9c2b36b5002d45bc074a317739651ca. 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/SE6XY2236791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1c8acfbc0241ce201d723cd41ff8c9dad924f5c289c99be66efdb0b7ca8d60. 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/SE6I32214818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc2b6e3e8da1c3471c49b070c76ce4bea8db795b302ed49fdd7db8729120323. 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/SE5BU2199662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b5a4f0950d61a69a807bdf069cfa34d1b41f6e51a4d294b7093828d57f81a1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE5BU2199664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037f7039a4e2535095bceaa777bb53666aadddda4bf58dc9c2d6ba5b4112d394. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6XX2133419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abeaebecb04b6e4443d3771287bf42c99a20b9525f3fcc1582d28b5defa46cb. 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/SE5BU1790196.