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 0x7219f504bce7bc265846947be9e722933e07d8ee4467db828a4538332b8c40c9. 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/add3a779-bcf9-47fc-80ff-61d42da4667d.json and https://artists.proofprofile.net/proofs/artist/add3a779-bcf9-47fc-80ff-61d42da4667d.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 0x001ad5b274e712d7738cc7ac58f1b3b4dc0f743468a989590d09f132e7849589. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/BRP1F0700311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aee8fa0b1d9300d546285327ad7b7a38646fd2b7c3a55b02b3abe8e08fee0a1. 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/BRP1F0700315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33babdbcc498440726f0ad81135f6856d5a9feefde674bb4bae38fbc232f9186. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/BRP1F0700318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54af469668f323bd460c083da6bbdca8692ce0012ebc8aa82457b0b0fdfe750a. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:55:39Z), 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/BRP1F0700320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad3a2a22a49214dee2ce10f074f315ab194d59689edeba1f659bce9953221de. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/BRP1F0700321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375c38d328e756a96d23c4e32cc953d673041da6c8d793fff5b9de9fb4b597d3. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:31Z), 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/US7VG1603440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9fdd25d33d073f5ac9c70fbfbaac7f2d35c67382f9fe09a9821b21cb6b7262. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:37:55Z), 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/US7VG1603444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b335aca9be4504395e8ad79eb19d47d7a421c8513d3b345177bba52bd30be4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:17:45Z), 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/US7VG1603447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8031fd25dd75b32c4d5943be8c942d01db9471b1c0ec9e6fa88dc91a76aca1a3. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/US7VG1603449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a73b314d659245bf1c6d2fcd2f15ceab2a402341ffd25d4ff2d261aab0d27d5. 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/US7VG1603450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa456f6040aee52ec44d56ecc18029bba8af4c2c84ac7c084b61142a45e483be0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US7VG1603451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a31a39c93ed4bd0490ea698cfb48e29c686514cf1194b97b9cfc66b0f0d6b4b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US7VG1603453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb7ab0d265d76634752fd3a67dae4a44f27acbdb748b0c518739e51e3491135. 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/US7VG1603454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b9423409c9f2a9bbf52a6a70aeaae096dd3a884ce27aa9110e4aa8e8053c77. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US7VG1603427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3d61c5ff56f510a36b6e7be229602bde67697095fc6a7e258a56e3195f4a60. 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/US7VG1603431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e8374608b9e6a9f5abb0ebde1e0dfe6e128953d918476f2148bd1bea843044. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US7VG1603433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d31b1031c2b193918b1c562ccfe8696c9274aaca36ed7468a9257946f16e3c. 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/US7VG1603435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7ba967419668911cc1bfd90de8b3967fd3abdf30c360e92c0c685e01774f52. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US7VG1603436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f38cbc20a0e5739351a78c7116823bb2d98fd2bb6162e57c0ccaf863db6b79e. 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/US7VG1603437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0994b9ca177b17cfcc53d03528b4d9b702ceb82ecc5c914db50e8106732893. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/US7VG1604700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507da07e2846a336a7345e4ba617df63e86d0dd1dffd26a1c2f3eb8caee11613. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/US7VG1604719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3890ef311c29f56eab29d1deb4ad2b7a270cfc4282aacdee3cfd74510d9142a3. 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/US7VG1603456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af5a43d0c8da92b1de7d13aef4fcff4a3751687f4a2309c510132ec9ecbf038. 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/US7VG1603457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e8d8e2b4555993ee7bb14c5851b68b599f7acfec3d7fb6116e210c63f58c00. 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/US7VG1603458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2259e7d6f4698e978e9a9a6d29a771896a9a3ccc1fe461ac5efab19753d487d. 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/US7VG1603459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde64fda484583d1e0348369a828ef60e4d1a1c6d03828c78f411602be75bab50. 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/US7VG1603460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6d71ff643ae7104e723b0703063ad1d178c91b591d8e2436280d2cdd6659df. 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/US7VG1603461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba204715799c760fa45cda8b6250a25b4200de83b771cf4cc1846dbe9c81e91a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/US7VG1603462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3289c0b46348a21ce43101cf44cb6a2975c137c96781678d8f8a6c6ecd5e8362. 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/US7VG1603463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244152982e5de552893490b90493fb110feff99e4f950792da8ab738b8f3cbea. 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/US7VG1603464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066fe0790562d7c50da2c8a87916249bf77b7bcbd0b366e8aeee3b0da384d4ed. 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/US7VG1603465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc7b9ca21f97f30a00cfa46308b2a8e071f092106d82bfe903ec26431eccc66. 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/BRB6J2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7320bd49e10cf35759578c35be389ec4695dc57703970d66be4aeba0cff2d6. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/BXVSF2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc7b9ca21f97f30a00cfa46308b2a8e071f092106d82bfe903ec26431eccc66. 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/BRB6J2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd615324bd8cc4ed23ea3e9f17a2b0f6ad7e57781815eabd0792393eb6dcd9d37. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJZ2519915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fdf714834e4f624d2fe620f0c740c74c00f71036c38941c7ab378842f81bb8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNJZ2519916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf583e9cb7d9566965a745a83a936860c2f42d91dae601c3d90a2709c67ffe32b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNJZ2519917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aeb8a47c467485eb691b0f83822da49980da879805abdc3e95a8f9e11a53fc8. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZYFZ2525771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b119085d97c031cdbc58b6ed280dcee3c8f83d40a148091058dcfabda236c3. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/QZYFZ2525770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f50ab1678a0200a09c85f09dc59e787c9c4f0bdeb1451e1e1cb1ea712aa9639. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZYFZ2525773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3eaefb0582d3f098d34d9f8007b3ce19e70c62536708736cbfb9c450b1a724b. 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/QZYFZ2525774.