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 0x847839aa775bbe54e7d19b32639f3d47d8d91184c38e3208fe6640a443847110. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51e0f072-c324-45fe-9510-84084a72c50f.json and https://artists.proofprofile.net/proofs/artist/51e0f072-c324-45fe-9510-84084a72c50f.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 0xc2cffbebf6055fbdec7a1b3456861a7560ddc44b3d4f5bf1c4ab8283c9238ca8. 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/DEAF71315989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8db88b188b10454e5e4d8d0dd243529f19a7d73ad038191635d88896e292539. 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/DEAF71315991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339c83f88a29e55dff7be3887d6be0d175ba05fb0f29f862e267be1e9f240abf. 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/DEAF71315994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e0f43c9d076c6c8c959310d070183b86737a305d8fdf33c97d2ab6c70f0ca0. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEAF71315990.
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 0x3aa4ac1b223d89c4c494499279d42aa25827c0711142111d125f02d96488479a. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DEAF71315995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025daae38c32210d165e338a2dfe4f283d7ea51ed700c8a26e4ef52d5a2c544c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEAF71315997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e865537896de8b85050d5968b26391b261f647f6a43a8b16eb16d68f8199d9a. 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/DEAF71315999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80863e0c2e369b7f81fcae28ce250684634e2d90d716c0d4097e869a45b5fe3. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEAF71316002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524e9faca80eb70d2aed80e02d66b3f927c018eff195cbe3f99e8244ef43ad01. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEAF71316005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8750bd312b326342af6c0da1db66122f5e3b699bb31b39c309817473aa3f192. 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/DEDU40900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15415db1f60a2f466b4df0e868ea6593fe35b48a7e8aab90dfade23ab69d5273. 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/DEDU40900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadce7548240cb288ef75b118dae316bebba35e9dc795aaea477dd0d7c78dd402. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEDU40900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f1b8731e950c771a216ba322baa1438a9a363671379f2f6dc9c15eb818663d. 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/DEDU40900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a53b451cdd84ffbe56fd52bdd9ee075667069d07fbd5483b7badd89538cade. 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/DEDU40900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3eea10164df36bcf44029890292f9ca62e9e4fa3b8ccddf62c55493b99c9b7. 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/DEDU40900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701c2098d67380f78e29597e79d482c7637cc489c195e4526ef7a8624a20bd1a. 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/DEDU40900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbfc4631e3231da187df451f6d8c22c092e9323290c930e2c2c4319a3cc76d1. 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/DEDU40900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0af9c7fdbabdce6568045be653887f6798e7a917640d673b80683bce04333b. 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/DEQ121748114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4f848f1165c372b8afaa1457d38c7893449be597398f97817d9d9fceb195ef. 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/DEQ121748125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247c34e9ebd75adfcea0523b8fb81647881202b88d00aaa172dcd6d5c4281891. 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/DEAF71316050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abd05aa0748e481250fb5c721a4c5a33908928e0cba0517a750e84d64ceec5b. 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/DEAF71316053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c3807a2eef34e098c8e5f1e0ee21d7ad1e786bb60ad868ce6a9e1040b4ec18. 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/DEAF71316055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af9a48b90b0d2627dc5d8db2f6925191710e3db9627a1a3c56814a08e72734a. 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/DEQ021905663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd910edec574e91009e460fe74280d6441a40b6c53768262446be31b49669e93. 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/DEQ021905664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dbcbd1fbcaa5aa268dafae24497130a50c89c809d4b0af4483b97c48cfb80a. 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/DEQ021905665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a109607d1035dbd3d2946ce5fecf37e52e53cc731d023cdbb2d48c7fd0c2b8. 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/DEQ021905667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd60b3fd0689a24bf573f8b3a04489aa447374edaab5b9d7e020f375d9175b1. 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/DEQ021905668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69233485716222c988958f64d62e2196679918515b7422a9a554faa2e3d99e44. 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/DEQ021905670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7746a38990b0fe76c189a054ba05156869a0cfdf91e021903a8908a2a81ca3. 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/DEQ021905672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c3f9e1bcaaa1a2d5f73b954bc9e763eb4830bf9fab59c52bc3afd951ac4597. 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/DEQ021905673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de4f8133d9ecf6c7d7ce7980969fcb5c6aa3cde46ffc9fdafa0b12913f788a8. 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/DEQ021905674.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4d17aefab2e613c9b3c123a713c21440af1728f19bc4a619c403e3defcff50. 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/DEQ021905675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd451a21bf371a7ee951ce975383aa72e03727e4120c571297bd653982fcde3. 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/DEZ651374715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe071d9cccafbba2aac20cf409c8de6512c15837522ee1491a98636238828bd94. 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/DEZ651374717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66262005aac81fab1c79495fae5999cb108cc35f9a618a8d620dd67d145b983. 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/DEZ651374718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b9d4b064cf72217d7a89ad00348179d05065742bd4ae18e641ffa9b9743763. 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/DEZ651374719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ecaba87d628c75c23383017500790b0a9eaf28a07f7b41eb975afe7ce113a9. 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/DEZ651374720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cfe50b34e3db80c229fa77a25ca7eac2c471fce41aee5f4b5726aa21387814. 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/DEZ651374722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b9aa8aa4ed6d6b5f96e2f1c8fed37a1fa30e047d4ef000a6ede91ce8570739. 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/DEZ651374728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317262c884d3e0a7b6d500d293453b7f1fbda312528c9238cf050948b5317a73. 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/DEZ651374731.