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 0x80b1571ef082f92ee6145134ebb491b30fbe44560d02c232b27541af6698ee5f. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d376eeb-a2e7-49fa-a984-102aa6f6f296.json and https://artists.proofprofile.net/proofs/artist/6d376eeb-a2e7-49fa-a984-102aa6f6f296.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 0xe109ffea82cb2e15ffc2a3af9aaa6134b9b3a5ff4a91861519fdd046b18a0bef. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BX4IU2412067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7248c999ed7079bfd87b0dcfd9c503f1ea33b5b2653b3d91ac26560620d8cc1d. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/BX4IU2412068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a68eefbca8934ee67e1b4b6acec6ccadcb9ed3fc1784c9de60ed9eb7114ac4. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/BX4IU2412069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eae691edbbd90d44ba56c3f8fda25347aa27a84a6366f25fa8fac34d824cee0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/BX4IU2412070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d6e1b3dc8a6a69580e5af0eedcd6e307b3a7c2e0ee2e5ea29932c42b425945. 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/BX4IU2412071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae92268cc0395ffd6f0660c2d5978acf16cf80853e158b4042115ee34f913b17. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BX4IU2412072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ba390a6647c20576867a29d55b36ddcc8c61e0651681043d259beb8189320b. 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/BX4IU2412073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478c3337a054beb813a33b4a76343b15bc50c4b1c2adbf1ab5be0b9d590614a1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BX4IU2412074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa552819881cc39c4a693b0083d6d844e1e136f04e2ea310a14b18bd293ffe8e8. 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/BX4IU2412075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a69635b21391ddaf41e8b7cb5b3d92566602bd55bdd0a73a100851cc196db65. 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/BX4IU2412076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8952001463a2e6bc4f10a0f74f4a98f3637be295e849145b5df6e26e184bfc. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BX4IU2412077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4488b5d9c14520a4aed9802391034aebf8debb3142724af1b1d744a1f4e65617. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/BX4IU2412078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7653a93df51472c3236df680efb6d7924e0806379adce1f468a74b91bab5f30. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BX4IU2412079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5f8e76d85e2298e66cae7017aac746d96f867dfd148b88136e4af14b0a46a0. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/BX4IU2412080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfd19f9aab4736eb0f3c97474ccc7ea2d91c15804aa7dbc8b17206c369668f0. 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/BX4IU2412081.