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 0xb978903e18fe0e6d23f66f249d06cac52bfcf33df2a2b069d90713ec1344f49a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2a2c3b9-d9dd-4ce0-aac0-2d6c50b017f2.json and https://artists.proofprofile.net/proofs/artist/c2a2c3b9-d9dd-4ce0-aac0-2d6c50b017f2.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 0xdbf875ecdf7a1cba815d66cebc220ad7e6832aabde945d5385ec43bc3857d0b6. 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/HKG732422939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20bfe11c6c5e1aaca068090a5854d168181ccff63444dd5083fc812ee37755a. 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/HKG732406747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182ad6d42a9d82708d9b566ad48acee13d7c7173716b4d34f0fd6d7bbe7bb67f. 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/HKG732406743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6266e7ed094c8f89cd575793b6df1386cc40addcb945dd47a445bd5e0200c56. 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/HKG732406710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a5a734da5e63408c5962cc1630d3acca67506e99ebdef0b8249a18f90879a4. 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/FR96X2468641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ea54e5e07e51f6277493d9164feba061d967339d0201a1e44fb2a453d93b3a. 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/FR96X2468642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2882c93a7d13657d290203a1110113e4ae4d9f12b40db67820db31f56d494c49. 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/FR2X42401948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fbb1cc2422a04263a2907252ac5c7b67cb5b06208cc55cffc5bcbdcf3b3a11. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR2X42401949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb682add56e819663a89572e69dab84a69a056d57d53eca5f7ac32fcba2161b66. 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/HKG731679123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3aab2559d9f213e4b6a6c7eb556e8af1df6795f57fb12052cabc020d967383. 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/DGA0Q2367670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729b772d873f97caaf2e06404d4a247e8126f5385caf99cde191fd9f2a3074f0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR2X42448855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd83f8306205b27f73bf41424c6bbe8041b0f602d7de3b8d35f1c4a5ee28b62. 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/FR2X42402402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9386126813c68ebd2d26fc48e17b7b4dac220749b9dc052bcabcd548faca19ac. 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/DGA082397419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0208a59d065c495bee25db5fc7098ac9ca60175d63c5e1717ea753ab7799d10e. 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/DGA082350220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbc9821da635e3d7a1e268d1e7b7058a47a80b24e086172d719ef6b475464bd. 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/DGA072319835.