thumb|11th-century Italian carved elephant tusk, Louvre. thumb|Cylindrical ivory casket, Siculo-Arabic, Hunt Museum. Ivory is a hard, white material from the tusks (traditionally from elephants) and
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 0x01effa4491db24c20f4c5acac7f4ecd3d4fef2f60a1c9c42b43d21f23ad739df. 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/a26fecc7-105c-4f3a-aec3-e03bf4eb2a9d.json and https://artists.proofprofile.net/proofs/artist/a26fecc7-105c-4f3a-aec3-e03bf4eb2a9d.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 0xf573fa6b342b4e7a2ee81aa78204ac4f8c907300004e88ca22c01c226023e55d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX762016668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdcc32a7efcafe3719527b77c628f49e3d248db212bf175cc4680d5720936e8. 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/FR96X2257600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd80eef085a08a76704477f789e8b6dfe64de4e5785b6d18b0d5b65b003d810. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX202289931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698d9263f9bb04f6696c7dc49810bb6a6ca9f1bc03aeff6c106dfd8524ec5c0f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:40:39Z), 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/FRX452391714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7b1a91d049b0cf1c973e8c90ef2cf968d860c7cc1fd064bdbde3261e2cc14b. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FRX872369602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe704e7b032bac0f235c3276975621bcc09bc411b4d151945eb411211a0ad8798. 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/FRX872369591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90fd2354df62116465827de142db964591bf3c04a81c02231a2c605c0257feb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX872369592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd763599e42311e3cef61409a2b863871794eadf757ca5dcbb0cbc4c9a09997. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX872369593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00460422a42ccc1172a6a0ae7be1f6a013332b9b089fbb0ee08ae83d54e73b58. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/FRX872369594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1afb26ab69eae9353b2d851ca58fc26e835ad1ba67ec4c5a29037992acefb2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FRX872369595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ca5f88ee10683fa1b9bd2c3b33ab568c1571c1682c2a44e11ca0b0b8700c0f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRX872369597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8a1149c53307944eeeb85b319be91e0f84e13a030fa2d66ee5c4ff123c9350. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRX872369599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7450cc7b8875cd56d6188ba5f2436635daa4746fab975964705dd1e663c960. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX872369601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7b1a91d049b0cf1c973e8c90ef2cf968d860c7cc1fd064bdbde3261e2cc14b. 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/FRX872369602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8e99e047319bcc2208a4f572b10039104a0c340da764392b35e617d60d2ca8. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DGA0Q2376608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921109bce12ea4b08763d972a6adb133e0260d5099204c6aa92dcb8bfb60c818. 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/FRX762125257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277c5fdd058c94bd8db3035c927a18a07e94ed13a486a4530d8c32d2b0aa7ad2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX762125260.