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 0x98283944673ccca18a688bea1d82c5a2655be5ff0178acba57442b3cdfeb5299. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4ef2f2e-1f6c-4e69-b5b9-2c5f48179ba5.json and https://artists.proofprofile.net/proofs/artist/e4ef2f2e-1f6c-4e69-b5b9-2c5f48179ba5.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 0x2cf5bb66970bbc569ebc111db9e5723acaf61e384fee8f741e41a49018e31c15. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:48:38Z), 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/USGR10500450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07957cc31515d0b26d7285804f115dfd1e16408fd4300d4a13fdc1639fb2c5d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USUL10300480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e67d2caa892de1acc3aa1dd9e7885ad47ae0a3da15e09895f4efdffbef421a. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/DEH840702320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59628fdeaeb82d741b3230d937bd0e2245a2de385aba643a5983d053b6c9b818. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:57:44Z), 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/USJE61301231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab9748399ee98835edd80846890dfb08b409d8f196b98c9d4c1c050c48d2b83. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:10:23Z), 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/USCGJ0505421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac8e2a2cc729bcce7b4dadfe69a32bf1b0681481ebb37d2de0e1b3a84889f0d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGJ0505427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192cb7e3fe88871fd9a2d76b3b3b5c70bf09e5faa42f90d2c23253114a82b3f8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USY280755676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4990f87227dc662455107a519457496248ffc980187fdcf9afedc2dcc0e4ea38. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA371044110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db3ab4fad2170d7a5dc6c0df31d5e00f0afc1552d23a843a3c5ed34e61db97b. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/USA371044111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc550e7a9cd0274bb8be36f8f6b7f39d9374b2b37112d89b7a9b07e07b2929bd. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USA371044114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d6e2505377032ad847496b5541fa793b029ef876b779b49abe170ce39d21d6. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USA371044127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ae1f94bfca6e292dd35c83bf5cfd39a75581eaad9beb77719a6ebefc393f90. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USCGJ1254314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2451fa8098dc7010b48ed742184c8854b0e67c9f9ee701ec7bfd7dc4f2109f7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USCGJ1254322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e79c20e12e483492d428f7e427676ba3a1278cbf2a07aa3026a5658c28a0d55. 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/USCGJ1254323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d57bd63533512bfbb8f7b708e074b3a7b986879b325a0071fb7317490758a69. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USCGJ1254325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883a21f8477c04a89339302c5be61d510a549f65240fbe75d054b4a0ab2c96f1. 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/ITC610300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07957cc31515d0b26d7285804f115dfd1e16408fd4300d4a13fdc1639fb2c5d. 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/USUL10300480.