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 0xa0f379b02fb75e36fa586346344d6da65f1a2566622f8e81a901c7a1cd794545. 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/996e11e0-4cf6-4239-afd7-da5e59b6499b.json and https://artists.proofprofile.net/proofs/artist/996e11e0-4cf6-4239-afd7-da5e59b6499b.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 0xb85c95c7b794221a750bb592ba57b8dddb953b5e084abcc277e2792d9c10a676. 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/USQY51538201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa250e4e02d62f102c191fd9ace798debf1870f7dc505b56c00e7c8baa331755c. 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/USQY51538204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60be1ec7057ef673257c0b59afa4695d3b72dbd6b618d4f67a281cd8907fee05. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USQY51538205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ea29d4ef570a2a92c6db8d7fc6895556c4dbd1809d54ff4af3fde9ec2ec15c. 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/USQY51538206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ac650030181a206882f2c82121fc6db9e9f80b6547b9eb2e0d4793cbddb536. 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/UKACT1827065.
Bubble Universe (Compiled by Emiel & Giuseppe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9516f1d205fd6d228b910ef47f43b80e1ef67ed936874c675b75eef9daa02e. 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/DKL9A1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5b919c397c19d9824f40521aa96368278d33c08c261f48a0e5e056b4554e63. 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/USA2P1683824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93ec51d2f582fc22bcaba333869c8ea98b69f5d26da99f7884110c5e4d0d081. 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/USA2P1945247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9c05e1d428ceb08fe9c52fe93d964299ff0bba42f8c2db17f216f58f5566f2. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USA2P2033194.
Bicycle Diaries - Compiled by Emiel & Daksinamurti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ade1fd09831a4e141b5efcf7d701723f4543576d638b1cb59581ad5bcdd2df9. 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/UKU932300493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722271c48d787a4752172ae27ef7f82cad4d206e1153efa86bab692629fe6a0b. 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/USA2P2126757.
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 0x95cff9b79ebb82e688850fd3d69da3bc5fe4f986548d3dc70dc509144183c68e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA2P2318144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe137e82875696c5ac3f37b8420db9efaf4d6c38dcd18783e7b30723b5be9c3f3. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USA2P2043533.
Sangoma Sound System II (Compiled by Daksinamurti & Emiel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d32fd167b6067949b8be2d87e0de52606f191136d2170ab048a2aab48228e5. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/USA2P1912113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d3c7a5caec729a7cebbe5b903fb23577971035a4c8d7afa43b6ad2cbb1b321. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/UKU932300496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7767556947a331f367e87463887d0e337105c6993eaa7d31d212cd8fb1e6a53b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USA2P2352060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cbf0a2ecbf92e5d6d143dc0be15af02cade3afcd5b7b834fdf7de123e2a5db. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA2P2116550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2948f609ab12c6fe92292bc8a213d240760c1519a2a1b1051c74c0ef7bd0a16b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA2P2424328.