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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81322e038dabe2eab52e03fbb2d22ddc7826a5692f78de5eeced2ab42beae8af. 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/93699255-9931-40f0-9fa3-cef246e31140.json and https://artists.proofprofile.net/proofs/artist/93699255-9931-40f0-9fa3-cef246e31140.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a31c31fc68e5f51e91172391fcb6ad5ed298f77ca6253e5038467b730f90a9b. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/BX3SG2300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17b7b77751cc7db8d80b4f231833dcb595ff7fa6f557337cb5a3098b6159cde. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/BKP1M2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b50c7634cd0edc570258305f3b7e6cd09de67533761f9a6c91004e0f1c51e34. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKDFK2400262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a3812532c96ef68369ff16d02f511603e8f1aa154c0d1b2947941375108746. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BK2NP2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabebbc344476d7b19a5d1140c139f94695d6fd2e67a6e11d78b0130a03c8082d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZMZ92497765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8235d2c76f4dc5be0a93b9412c9a36625a0515d71df4f19314ec9edf1e4da4. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BRPK12400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcfcb6578a39eafb631a237c00933ba8e92fb354ac88259dbcba65a526f9e0c. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/BKP1M2400214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd8023835d4fb1cb747b9c3c3217c8fbcf2b68b4288ba428d2912345167a2f5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BC3PG2404709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7a46b8b9898801723147d027bad3695e71e8260f5d8e23510b7669b67fbe87. 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/BCERV2400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6811777f34b549932f343fe70fb6d3cc8de6fc00f39d803cde8e8e1eeacbc0c. 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/BCNP62400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eebc36d568695982e08efc608052e3452ca93e9c20964ffca2bbaf4aff9be74. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BKP1M2400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b294af11965d0cb6fdf7fc66703ba6796e9844d7ff355ec0f763d52c5f33ff1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BKP1M2400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5765f8df248f0542470f2dc54fd2b00dba113573ad7b68d9acb6566e9f15ff2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BKP1M2400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca17d10bbf280ce3b87a8abf16869b98a3a073fd3ea099e61b85d618168fa3a1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BKP1M2400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff8c96ecd4051b1d25971e6494deaa0aaca5bf3c7340525d5db3b42fea38dba. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BK2NP2400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709f8f4325c86dd58590394ac762b126ecf40680938a536c9ed72856184e48a8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BKP1M2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e12201fc229aad9e04f819ac9ebbcec58518eaf5b9301819976066861cbc8f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BKP1M2400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16388a11534373656ac16d65023f5a3c3a7a1f6ebc452500fdae871278c77cab. 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/BKP1M2400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328bd690edb0367f69be511c4697ac308afe487a58b333a7cdb400dd8aa66c2a. 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/BKP1M2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba8bcb53cfc4cbed9f1a209942d5667e37fd8b22c0c52fb5c17e6852d257806. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BK2NP2400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6d6b1108d2ee4e9374da320008bde8f6670e5d03ec4091435fa570448aff67. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BKP1M2400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017df8db82eaa76a004bd2a70ea01ad202e6ab16719de69f5aeb7c8d78e9cec0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKP1M2400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59582169d7bce0eb7d2e2cb90c5adc63a7f241a03c0429c36d7e8597543182c. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BKP1M2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99558bfe8f01c645dc57e83f95d2a3bbdc20b2c5c8c4095abb2c02cc6176272c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BKP1M2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc656feac93599889616989a8ac156b9325793ec2595b28cf6c496ed1a47a77. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BKP1M2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7271e46b72e5d2be37096d3508db1f2f673545b3ad5859152030cce252f74f54. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZMZ92498511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c76c325d5a56bee4caec4d47712e968faa97e87b07bba0404799ba35e69aa2c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMZ92409025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308f1285311fb35579e671ab692a3ae7b05a1ab858739678fb4bc9a1ce518d3b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXKG22101548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d7bff7efe54b202afc2521fffee7ec016097b7549f4c11382b242992289c58. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXKG22200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0234422a43b1f96a7abcdedd21095f7113e1ef1406ba7fb2c810dbfaa751c68. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXKG22101380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eac5621d2dbea368e51a4b62b28ae80bddfedd947081f790520a2445133cdaf. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/BXKG22200377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7565a6b458aad2b106d9b8bec3585de9c8247cdedec9943d08d84375af9f9c62. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BXKG22301152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde0116bfbdedb8219efcc401f4aa80da653c8eef1db53a812c0da6abf6ea28d. 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/BX3SG2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5670f530afe3d5cbf9c9bf5f2ff68fd92ccb5a6a44445ffad3febf4d3c054d53. 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/BC3PG2200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbab1c9a6cc5cbe413f6589c69f966940e746cf133b20c4bdf6f72473937a9dd. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BXKG22200631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5635ab826e3b76d9306356d0db6fe6a717d4a19e635d53045ca1307b02bda15a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXKG22200432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899eefd0672dd3ed618d95b61537622c00180e263ad6470dc727109c5aa0d554. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BX3SG2300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5edd0d13d490780f7aebe7ce303038ff0dfb1fadaeeec7b3a9beec30e2b90d. 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/BX3SG2300238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb456374f6c8baefaa1fd628060164ec148e0f578afee1c6ff13662826a2c6307. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/BXKG22401192.