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 0xff0d67dda3f68f4e065a43a8c9a9ec4d7f76e671882e3a37d0c241e9ac8d3213. 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/73211059-f654-4542-8971-42c6c014a6aa.json and https://artists.proofprofile.net/proofs/artist/73211059-f654-4542-8971-42c6c014a6aa.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 0xb68a55341ff49b7f105196b79fde9a779747bb3056fe4052c26ba7d86faf96a3. 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/RSA181341532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0f8c4719a5c9081f2a3e0f356b3af5159840b21875b7272e7d9eb97d8ed387. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/RSA181342103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7484cee1c3a46143b069445ba2c1151fc20c7acbdcf8d067083a48b91301dcdb. 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/RSA222305903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1914d664462e5d309062ad96bff3abb04fc82ef217f296aa73ea8f213bcdb915. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/RSA222305905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352d1b64747dbbd4605cd05ac334b95c586532d5a94a0029757f7ebfdaa4464b. 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/RSA222305909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239ef154695b43b4cf08be56bdc41a3aabe104380a380e90eecd6910b34e5765. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:17:45Z), 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/RSA222305910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3128a93997598e1f6c3c5d439e3648f6945ba4e2e060e0465e9577a520e25e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:18:37Z), 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/RSA222305912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324508d0d875ac8e13665b20d05f8b63f33699ebce8bc090b34b7d6ab9f4f340. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/RSA222305914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a26b95de5affe5bcc31094b562e16e6f8c1a4ae9cc8283bc9aa0ff1b1053514. 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/RSA222305916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13b2e52378db2c1710bf20f438250b79bbe2271df772a5c4d22a5dc9fbc2c32. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/RSA222305920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cee238100af159efd9ca5edf5f2d296f20bb69f5f936b6d79a3ddd04a773943. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/RSA222305929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eba676f933e7c02655f1c51a6746be362de2526809f6cd804badfeace0fe6fa. 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/RSA222305930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a01640e67c39286d42d01dea1560e0cc4a49c098e4117d151056e63ee5f6554. 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/RSA181341398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333344f74fa02dd44ff824c6a404d5004553fb7187119cf4274887b3b1af7ee1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RSA181341399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368379b54e3d30b71b6656a9dc35f4dfb2c5d529308532ac9e8e767751aaa3cb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RSA181341400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de25bdc72bd2a6cf6a7e7978bfa1cf8172de2359f87d23b8618bbe2f86f83ed. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:27Z), 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/RSA181341401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65b4464d3869ec6257136b8414c65397ec4e3929311d0f5f9a203a151794579. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/RSA181341402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2955915808f9bb5b2547fe87bac628238da6deffdd27d495804a4378211ffb8. 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/ATAJ12400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5588beaefb6a70c1b4420f0409b4c3fbecea8efa2cf9ed4dfb49fff13f649798. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/RSA182344390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d331a5971e52662819077360ff8ef12874b5b91d7b79d7d1ca2099df75b356. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/DEKB72525587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fa1c4ccea015ba6892d1b6e069ab931ae18cc7cd4a36d232b758cc1059a7f5. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEKB72525588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c164b2af17c03e86f284c6d05199b5c6307f8334cb9c4b452145c692a93ab2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEKB72525589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f23c5f45d7d57da89fc7a06852b4c7bcf343ccc92ba210f95bb21f39c2b6120. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:02:59Z), 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/DEKB72525591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff00416cb3169bb3a27126fb8ea9ca378f7e9cf6ff7e28edbbba3907507f11b4. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/DEKB72525594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285b36ae4c14ebbd6035bbf6d9d5269f2e7554bb57561b8f81cf7c0b92d2c2ed. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DEKB72525598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4e2612ba59d53e5de130250fbb58da93cdbcab18573f71ea6f21e44b0e5c01. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEKB72525599.