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 0xc7374e788acaf4e50b6be1b95a88c7d743fcb62ebc0d78f9ac3f27048983a10c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3253eb59-4f55-452f-9e7f-3ddab8eae95f.json and https://artists.proofprofile.net/proofs/artist/3253eb59-4f55-452f-9e7f-3ddab8eae95f.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 0x8968c0ad1721b527501a7be493fcd2a7346a79610c45053581b723ec44e0e0fb. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ARF043900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a7d71f5662c7fb26c6ffa680401d12200bd195fe2f64e8f30624fd5073b02f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ART720310037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b48ad51b5197e6d49c2e048b792b25952a5d5f59b05d183a1534a08be0350d. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/ART720510433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd1d406e90e9e07f7433f029629c0f17a6dee5a9b5e944908aeea63627180d8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ART720510435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191dc0191e27975dfee417e2bae9c29eeeaba71fb472855e1fd016daf0d18289. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USA561388843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0870fff617a8024534e2d61a7be7e6216ccdc8854394a92ba4b77c70772f6571. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USA561388844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cb8936e5ac517ba873a5746fa52c9a7026e77143a73a423cfdc3fd8312d056. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USA561388850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed43e989721b272d7430b3f036e2ef215a3d3ab07bcc77647ebcb7a4857c92a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USA561388858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49cc697438e4cea0d9fa1ea23a246746e429d8461fc7aea18f371b75e180e29. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:28:39Z), 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/QMDA71497949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b3ebac5a3d192f79b02ac64ce5538dc46becc7a7fd31193544086c08ec084f. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/QMDA71497950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8513441ebf99947a1100880a00ce0510ee3d520336a4fb3b9479599d91799ad0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMDA71497955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb260d481eae822a39013571916b724605161278f5776451e27c0f4fa21480d. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/QMDA71497958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d296f63bc13a65069567eac92403d8b2bbe2943225a146964a2e8226a2d4f3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMDA71497960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ac1de6cdd73bd7d4ead1da88a9884ebec82ced97aa0c653c68ce7c6dc11cc8. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:17Z), 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/ARWRW1700140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785de7191b708342a3015bdbc4e0b5f5deb816505b0d802742acbe94cd53215f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARWRW1700129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e27603ac120e074101ca14778eecdedce4cf455ef6c1e03c8a0b3879446963f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ARWRW1700142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77145f9235faa4f56eb9c8cdb6c0808ede170aad52939e47fb18c0a264eab36. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/ARWRW1700149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bf27ff122b4ab9cc27a7be1320a10b8c575d299a5b0785bb2e5d4f158ec483. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/ARWRW1700150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6168b628464acd16b5cebb7790ea272c339c292358df3d4d0f8fb6ba995ea6e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US3DF2038634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60632702b6ed05a4e0dd1c1f63283f65fc5ba855a7c843fb98f7f35001771856. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/US3DF2038639.