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 0xe41870094504b0ec5fb4ed0d12cb0d533a5b67e2a2ba863ffc3fd674a4e9cb62. 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/eed3273f-12e6-4f29-8317-5e614693353c.json and https://artists.proofprofile.net/proofs/artist/eed3273f-12e6-4f29-8317-5e614693353c.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 0x3e78bf589bc8a32eeba715fd3690216a622950c15fe776a4f77d1e37425453ad. 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/DEQ022108648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c139dfb3d48632668f3bd40d00bc48e585f4deddb3c1771e8a47dc1ece2171. 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/DEQ022108653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb116b2c3bebc1eaa1a60741fe27c66e6f012888f1007a899579af169e5a421c6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEQ022012460.
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 0x8dfbf8ab0dbb55614800acec5a1b404ba974b50c31fca85d98a581179ef0aa7d. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DEQ022108655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0430cc09ea9a7181952442594c0e55a380ee1ac78b3b0cdd392291e70b0e7543. 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/CH7812372339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd886f835d34d3ce07c04510640a44f4b92b8a17fb3d34a262356d27b7546553e. 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/DEQ022384306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e423e19b4d9fc783b00ed2ef7b1f0ceef4bf4e2aea58225bb4418ec4e6a310. 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/CH7812349776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008bcaca76e89a619aeda81170f8bf47726651111a109484347363a774388d88. 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/DEQ022371763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b48b82fd209266a1e17816dfe8c54def8d244070560e1fb67e409ea4d3483b. 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/CH7812241443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b18a34dfc616bc839e30e31b9dafe9d2d220475fd62b6dab31cd0bb2024e9a. 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/CH7812234815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcc3f5e00aee79b71965a65b00483735c5e6254c97d8577a5f8ea1fd776ed83. 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/CH7812235864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950a3b1c2fcb8a79371cbc01ecec226515dcb6c1cbbdcee9717ad4aa94769a8f. 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/DEQ022282998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bb8ce36928c2c0376079f1d99a99c1945453db7d7ed8db3eae602e2bf5bb55. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEQ022260514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5a24fe4a3eea1f40a865da97d7a6e1ffc7d154c7a494720696bdc886277d25. 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/DEQ022260330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acfe3f29cddf7a703620b68f9d912613995d61805d5a25867c080a72014707f. 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/DEQ022280003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e625a57f6c5a8b7ebb106ee570dd9e8106f1fda825f09e15620d6ca5706433d. 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/DEQ022118754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c15b67cfc0a8b25925ca2d4242b8a3cb78c07713c1751b9d5570538bcf5f53. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEQ022118582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5383bc1ca0134c62069af95ef67c85d939a47b674f0562e6ead8cfbac8880f75. 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/DEQ022119234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6ea48cf2d01fa58f0a99b64f93b4a5528200bc7b8724de1a8575327c72d7cf. 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/DEQ022117991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ddb70d8a1e22e6d6e3e36c5c47b1144762110847cfc4d7637f67bef184504d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T09:09:29Z), 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/DEQ022117807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4ff9b4ee966049353e0fcfb3b01c2e4d527f615c2adb98c2dc2107c5a11b4e. 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/DEQ022117072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940ec8875c5357836fa089318b76ac732032e87678588932f61a0c30ad1b86f1. 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/DEQ022009224.