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 0x79afe62cc8b9f6560bba2c8cc7504040e1b7b6676a0cf22b8fa26059a9e4b459. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eae7c555-0929-46a7-b531-64cc403ef404.json and https://artists.proofprofile.net/proofs/artist/eae7c555-0929-46a7-b531-64cc403ef404.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 0x55f738c6491d3da637ef01ea7076ed5f4a9698765c659c6febeb82ac82c3dd50. 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/QZTB22243155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aff41d3d270568c316d07098f1f7b0977f174f5b7300d9f235df42c6ee02262. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTBA2218334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e4382e3336b788626eaa425250fa4e4a08409d092fcddd852c08bfc5da67df. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZPLR2327639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1905b557b90e02d36f66bef48fe41a023937028aeaf262e77a4282b8afd0d0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T03:00:45Z), 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/QZTBD2476247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fb5aeec8e7aae1eb01a5aecbe61e81f176c5e7222be1e1c2631571a927e29a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZWFF2432964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd9589214d1002e3a3fba8cfc4d5e5e27f58447cbaf8c5c7fc5450087de1a30. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZFZ42555407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ed8a4938e83535636a3dd3dbc2a3c7e1831189b5fc3c0b6ed6def7ff4c5f08. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6J2530029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6343947ec4dbab2ba2ef82d9b5a33db9aeb629c672f612f24f71be32a8b9575e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7P2583772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf914ac7762b67d1b083424c9d506765b5cad4f02fc53dd68a114db45550291. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZZ7R2548842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468a85249a770f021cad51046f81a4bbe94cc37d56562899679a29e383371a2b. 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/QZZ7T2539317.