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 0x17ba24a7b5741fed84856494207a7ebdb82e0cc68509cc43ecfc8c4e8104a877. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0d5d170-45ed-4db5-b6a8-cc83983c0270.json and https://artists.proofprofile.net/proofs/artist/e0d5d170-45ed-4db5-b6a8-cc83983c0270.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 0xe901711c6e806fc94efa758d5590b2975c81e314a07d67dac7539c6122c58ce2. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/FRX282285306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b5d107f8911836a631ec0290df53a5f72e2d230f928536f4bbb5544f49b905. 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/HKE672300838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dfbe095464ac1aaffc294a0068f0be8fba1488a75290e5d79b700eae08a9f8. 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/HKE672300848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cd9f7b9a4b6841368e29a6ce052199c0bce245aac800197ab4559b3fb4b288. 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/HKE672300850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300694ccad2e4cd17ed3288cea1be40a256e5c3603412e4c7d7385f575a696eb. 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/HKE672300853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2124f7cf3e19bdc1673d378c805fd251ca3c9a56cde3618a5c1b0d4c9cf2fa. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/HKE672300847.
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 0x62b999d522dcb3f40fab57003af31b7e4b9c38a4d1e0302afd419d385883894b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HKE672300849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b9577bbbbfa1fb269aa0b90a488528d62e38f1a003709521cae24af7136e1d. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/HKE672300851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ffe1b8e6e32edb5c041a39a9df148f15b32bcdf4d98d43236dee130a2232c0. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/HKE672300852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2407f5aacc2cbfeaac3c0a6f337e52b269725af1ca09a82a50c9504653d2573. 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/HKG732431749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e12c36b865fb3dc7ecc62e2ef55c61a4e803cd70918afc17982ba4a16f2d66. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732431750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903f05d2fc1ae5098babd9144d3c00f39a01e5f60c24832c80805d05e8833872. 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/HKG732431752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d97c0ded547ff4d77c541e81ae04928228e1262436e69e3e143dbb3277e7558. 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/HKG732431755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43b07a449a666512610b7967ddd645cd48abe09d04140fed4a859c4b82418d3. 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/HKG732431761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fca7ce893be5bdd5aaeca246f6cf397dde45a3408f48e9aedae7fc1817e000. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:06Z), 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/HKG732431753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f146cce2deb5035801d1aab3c75ab25a06ea286b4bc63ce7df0262e0726380. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/HKG732431747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd7036bee24161d3e240703170c09a2fc82df7af5d284cbefea92a7f7e6db9b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/HKG732431748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266bf616702b8904ac466989d360c9abb66140e8dbed21e5018ff190c08031b0. 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/HKG732431751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9313359f9d3d52003e8910d63a2894e77c79f24c70466b8e7bdf58f9e11215f3. 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/HKG732431754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d4e614da669c2f6d637894221e31aee726a9c5c26f4c60d827767e840349d4. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/HKG732431756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcf718b685386bd601fc15560cdef73e7eb465f26998be9752eee0b5f378dbf. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HKG732431758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46fa2f93069b0753cf4c027cff2da4d62860d6c00b175999a2eacc19f578916. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/HKG732431759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2bfd318f167299ffad100a00c64fe0c22e34e8541f137d2cf71f27cbe33fb6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKG732431760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c369f6c7e1bc0a9c02b36133ea3c80a476bc7a4e59021482d77bd11230ea33. 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/TWA472288024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5e9ea1626c72e142148bf9a1896fb59786c7584c27e021358a1411644a3831. 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/FRX282119258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d507a1f84a23febebda2f185fe95555f952488ec45b59e45ccbc6cd86b94dbc. 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/TWDJ52300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbfae644248405ccdb8d856ed6f23cf7cb17527fca53399e468cd5666e4e0de. 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/HKG731741606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf060f318cb62e0c067cde589de0fe71334422d1062873e7439c3ec250077b9a8. 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/CNZ852316464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd894b7ebf5c0cb4ae6c67af2bf685778d2312cbe748fd6bd8700717eac566c54. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/HKG732467342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925e84932441cb781ad53fd2aadcac2cdc1ab8971079f72ec74461726fb16597. 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/FRX872380576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd635656c6a19c2285cec26d7cee2037a4a31a9a892ae09292bf03e47eb1545c. 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/HKE672400046.