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 0x2efcf3a8b3a2eeacceab1ec9d49f7deca85ef42981981581d32d50932b77a3dd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/790eeaf9-d3f9-49da-b776-2bef667dc96b.json and https://artists.proofprofile.net/proofs/artist/790eeaf9-d3f9-49da-b776-2bef667dc96b.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 0x3b6b7de24d7e80d9fcdb6275def3c78ee5f2ba77d474e97bf4de4bdce144bbc1. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZDA82361356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983d5448b9264146b1d87af9c904db607f1f8bf91716f0adf3019ed9ea16851e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/SE6HN2301681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c16660ec04e02f370b62db51840b839a91ba464e12f20164268b7d02ff21f70. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZHN62337690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8428ebdaffbce853d54f01f4b44bc0cfee6f19134a7eccad37dc95d9aaa6cb79. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZK6G2375155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8bff0d7f94038ddb9a2f0bd064987fadaf64065da4fc7e5544090066b183ef. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZTAZ2347208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40114f455299cbac37ff0af8c6d63ab8afeb7fd2f786becb876056c9ceae15c3. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZTB82360384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4ed6d9ceb990b4516c1e48538e2e49802ec8b773dee5dfed8f5f2aafc0f15b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ22463393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa094ba35566e2eb20b8233424cac47b8d8c3c1b566cf40b5954bc4ba0ca53cd9. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DKK1C2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a4f885a197d76573473deb017e593f1388ebec9f9253bdbeeba4ba0b321773. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZNWW2416515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8d9ab7d1609fadfbade26088250790a5d557b6e845780665c8eddaf27bff10. 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/DKK1C2400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c9ef882fceaefdb2376859337a2958750aacbed818b57d1841c7ed74765efd. 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/NLYK92400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6653e5f3d5c7b206d924bc3be6e9ebce3b5db02592a1751b82f468c7d25f4b88. 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/NLYK92400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391a84fa017098d6aaba9f73406e6b790fa80d4a7d7331da06af4203cd0a478f. 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/DKK1C2400304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1665d10d3d8c98bfeeaa1e8ffe74fa683c83d6f20e01a9ed1e4cbaec85be19. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLYK92400317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6482103fde226c35bb399aa7caf9e2cdec9de61078d7d7e95c3e7d110ecc1a72. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:44:49Z), 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/QZZ7S2507252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d3c38488b9bf3b1c4b81aefb73521dffc286ef3f492b2f843ecd0b93508d60. 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/NLYK92400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be04cbc37da31d765d1ed4ec92d4afa7c79bcd4ad9fd581f10399281cb56033. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6XY2560679.