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 0x6b09fb6059f461084dd10cd0f371c364a0f468ce623b310d5c62ca43d5d114fd. 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/118d7086-9114-45f5-8d27-70c0e70a6831.json and https://artists.proofprofile.net/proofs/artist/118d7086-9114-45f5-8d27-70c0e70a6831.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 0x35d174d535cd18de7f077f629dfd84a51fd09acbc893673a027b95b3cec826f4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ42049043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9c535dadc091a8349fe1fcef3cdc8ea5eb35e4efcf11ade52ec968b2d8f31a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ42049045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc297adaed62c56da48a837ac8c444e57cee4d0f3ff93bddf6bb447f071f186f7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ42049046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb894d08d8eda1e6d3dd0fd6fc98a8d6b89ac910a896e9368727a46e942f7bf9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFZ42049047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16f95cb4d7fe58163b70816e5706405d66aba07d55eceec22d49e015d8e9d83. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ42049051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788c9602039641844ccf6ea28a89356f5f5c06797bd336ef4642a298120b2f39. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ42049052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6824bb8f4f203088d56c67bbf8cd3817e7969cdcef54c8c4fd2230d0bb7e3a95. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZFZ42049042.
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 0xd4608a2e7a2d40432f3058e73b4da33b8a782a14c635f0740a37358c2345b2e9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZFZ42049044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ac48b4e32a3d5003288c191df1c99b3a8181c94c4d77f56bbbb4f7588e6b45. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZFZ42049050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f06478ecfba95d3c277fa1d1158937a522c9079bb1193f8f5a40889a3387c5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZFZ42049054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d16c1f6d0a82182ea927674ce78e5f474a7a8ca7f9a90f1f8a56b08c920fa5. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZES52263053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7e23e7ac083f3826b539910a89e3fa9a2c420a472c23619eb3b84800756b83. 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/QZES62290396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf137a3c9b6a682d1a59e5f02b7597557d57c27a88281a5a1fa7b302bd6827810. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZES62290400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3963a90ec67b852d51f8d32082ceb842b4cfae0791035799d368489f39edef40. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZES62290403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e7cfeb5739e9db18ffcb1056a34134466b344d5cfa098acfdadc95474eaf22. 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/QZES62290404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a582acf368d6f7a4ec13aa63856203c38357966d8e7119a2b3a5ff6a15c7a56. 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/TCAID2400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1954b7e852fdaac7d205c2cb6a8603f369f58698fc7cf6cd98787f86adf502. 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/TCAID2400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5259a0f9600ccc9fcdc2f4f47814c3bd10b523d33f12346c8a550408881e9410. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAID2400271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb54092369df0880018662ead514abdfce256b63d3e5936068a040298e3b9c2c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:16:17Z), 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/TCAJD2583361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32edb77c7ab1264773ab18b21fa00a93b9ed1ebfecb61704a08f16a7f4e6f64d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJH2506918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ced89c7c7cdc19706d3412de7869d1da7d76c5fd5b301cc48b18e441f438afa. 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/TCAJH2596079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74d02355609dc9d2604f059be5cc8146650ee0e86482ac2a3e175c8f211e6de. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJK2589569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a86ca272e959710763d3cefdcfee6e1ae1df9b5f785b4ac822652650fa956bc. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAJK2589577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3238422c52575659370dab357dc53edf84d274f452a5d881d4a53877754662a3. 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/TCAJK2589583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b821775312e3c9c0e70a4ddf9a52364d7429524bcce1b05d727435302181e7b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:01:02Z), 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/TCAJK2589588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c81dfed6a651a76584e65191ce7c60fa96936cc5325b7ec77aea893209a2cb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJK2589595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35755561a75030affb07b4e1715c41df5e43659b3abb1f5ed60c7091eccb5b04. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJK2589607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b09c97e0f9d23045e7db440c5ec89bb4b6be738919f01e791f41f4204b838ef. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJK2590161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27fdf4cfbb4b67fb5f16dc808f57ceba400614d23f2f3c01dd45c9fc6ee5386. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM92014423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3fc56787f50fe2aea56fc41c7995cd030766b1fe32f785410bab1d6942d5d0. 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/USZHR2100172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea1ed04f1ec804ecc9ecb8586ad878ca67b61f43ab41c735d0bb7c53864d70c. 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/USZHR2100188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9243eb8881b366a22b925bbacdb072c8aae993b66e0f062b120fef9fd255af1f. 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/USZHR2300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844ef3e69d3ebe405eaf100f85dd02ef44d76f4ee2e1180337509c22683ba2a4. Chain 2 (Bitcoin): anchored in block 957034 (2026-07-07T11:52:37Z), 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/USHM22491424.