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 0x72b037d3fd9a16cc78e057a2e63e691e305e7014736c31f3d8519c80fcf7d04e. 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/3f2917d6-02a7-4d94-a20c-de33073ae801.json and https://artists.proofprofile.net/proofs/artist/3f2917d6-02a7-4d94-a20c-de33073ae801.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 0x101abcfce3bcc0bf9b99a7084335f7023ede4f3c74236c77a143681dfcaa96a2. 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/FRX202257588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101abcfce3bcc0bf9b99a7084335f7023ede4f3c74236c77a143681dfcaa96a2. 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/FRX202257588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e66bda1afe744ca98fa1eda783c34b7c7f394390a8b67d323d4e997fcf8f9d. 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/FRX762271785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc2c73d0b3b57115ffacf3416087759b7947ebaee2912960eb5f4094bbf00e8. 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/DGA0P2325585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8090e0990bb857c34028ca92ffd54bb7a0519334c77da2656f6d28e4de1fad62. 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/DGA062202203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6509da54588965ba8372fc230c40807149e6eef4b75c4d3d57c778d7e506e20. Chain 2 (Bitcoin): anchored in block 957212 (2026-07-08T18:33:44Z), 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/DGA082239670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f458958fd21b52ba09a80c40d4d788a9ec986b5a5bdcb3ccd3a29100dbf9f31. 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/DGA082314969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e66bda1afe744ca98fa1eda783c34b7c7f394390a8b67d323d4e997fcf8f9d. 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/FRX762271785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e66bda1afe744ca98fa1eda783c34b7c7f394390a8b67d323d4e997fcf8f9d. 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/FRX762271785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101abcfce3bcc0bf9b99a7084335f7023ede4f3c74236c77a143681dfcaa96a2. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/FRX202257588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ab73dcefabb9a2cdb0f8b472f14132e9bafc59d2f27930314ea41d298ed15f. 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/GBKPL2287150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8062f1098c0ba1052b5c694dedcf90d996c04e16b0a7b0f38f5cbadc031f6cb9. 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/GBKPL2287149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40785314fc537b2f166a3d219a57b00b4df7e000f104d84c1ca13305bf7c2a6a. 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/USDHM2111539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce69420107ca0b2c60e320ab8279f0809cb7f9fcca36e9ffb4cbd0d9b73788a. 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/GBKPL2287151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f190128e2a43844b44d2f3fbdccfff65f16212db6663509818d05761c056d1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USDHM2112362.