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 0x8cbb646dc783c7b04f8241c49f035f88e90d4f14a59b55eb7ef8818dfc99629c. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96551c9b-41a1-4fe5-a4ad-4f30ae023fee.json and https://artists.proofprofile.net/proofs/artist/96551c9b-41a1-4fe5-a4ad-4f30ae023fee.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 0x16043119e5221d4033ada47409a2bcf1be51f2b806ab7ce6d2633673c08aa57b. 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/US38Y2420143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ecfeb5c8c10a72c8bd7c2c55bbd334e21a2778d4083476699f03acd146d200. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/US38Y2413687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bc70bf334fe2ac39021e10bcc7f0679c64c9eb5608c5991c56ca92f6cc2fd7. 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/US23A1512157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82ef18bdda5cb0f7f6a06f915b163150f84f27ae7ce9ca222a852dea4b9567e. 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/US23A1501459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa725737ef2cf8b07932ac59daddffd3be95900072d17f3faa1a38596bd24008. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/US23A1501458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c38d2a2c75d55b447f6710ad7edf60d95e4fe52841ce7d8d8de36a928dbaee. 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/QZFZ62098830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a5cecbf834a9e14161358be7bb848a2f775524454da7fcc837cf30f1d8f597. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZFZ62098831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799e59d9f2b8350baaa242f5b3676642994e9eb84b5de428edd5d5a2a75d546c. 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/QZFZ62098832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8447442a5128a1dffbc24fc48eca6bde5518489374b608b4ebd98ffbc2f3d4ce. 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/QZFZ62098833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc0d1fe544a771fa0a1e0428006369e5ed58ee962474782e6804735061fdb72. 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/QZFZ62098835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a6bf81f719f50cace73f78f05fec9abadce6c45356e7633af76e8e9f172247. 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/QZFZ62098838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa26bc98ae143d113762a69dc4ca432c28f0dd1bcdd3bf9487ae04ed18c3d9f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZFZ62098834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6a7f27160cb7c7b35e31470b46f46b95573c7d64719841ddb8dd09de6f4615. 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/QM7MR2000400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5117d58847d15eecba5ccb79e002bb4ee3866c867bf6a774bd09a8cdf929ad. 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/QM7MR2000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f49310ddab16ecb38453e291276c8c2f76e46361bf3ce3e9d4da9acdd66105. 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/QM7MR2000404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc312aa3943d14a846c4c548129955252fd69c8be38eac632f30632bb4ccccb2. 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/QM7MR2000406.