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 0x6421e1a7de82fe7de3ff13bc855718453bb6be9ffd69551964e831bcab557c3b. 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/0e3a60fb-d6c5-45b5-9fb5-7947e998ed0e.json and https://artists.proofprofile.net/proofs/artist/0e3a60fb-d6c5-45b5-9fb5-7947e998ed0e.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 0x14e3b287ff7a03746894e8f420f18b112180022dc517fa47cc4ecbc91374727b. 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/DEEP81303517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f4e8f2c097044fa8266a6b84aa601a17ea77bd4e84c0a533500492558a5f5a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DEEP81303521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e88c4de33c8497529a1e28d9e9e8d916c38bc4054ff9ba4ce07188b220b7bd. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/DEEP81303522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee28036a6b38f3f519f2c12685fb971b1fa45ffd8cc9c763c88d3454f53f3d47. 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/DEEP81303523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d15ce1fc5ff82ede8caa1b28ab33ca83a721f2952247954f39d06546f561de. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DEEP81303524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b5decace0a43956291bf277a52d127bee558966b021e34772e76383524bf81. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEEP81303525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0188241fe63cd652268e76033169bbb5295a1b70cd02d66541ad896fbbd020bd. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DEEP81303527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95ee69a30cb5ca9ccf29ac2f1892af11d79edd0e36b1ab8ce6010466feeb801. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEEP81303529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a939b7810c7c67a20ed9cf9448723cfd4a6ac6e33e5a7d29c51626a89466b59. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DEEP81600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18812cad1cf59efc58a29c39aa8945abaa5ac984a7e958bbc2203d98116a88f5. 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/DEEP81600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f38f3c6d29cb2a07c1beb734b8e3eb843101ee03f60f1cc4201c3bb4cbf4970. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DEEP81600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c65ad1ac2e594bd47243de81dd86204d4d76ffeaf3d38f2f08b80887de6759. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEEP81600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde12f86196de683ee047965eebb097cf4c329c9c9542aecdc7e2d0cfa725e00. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ATM051817001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4aed5a5e847929a9720e0470ca0705f3c24e50b0a7bb7770c357148348b4266. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ATM051817002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ececc2f5a30eeae1d2b12a7d69df3f96056d2268f32888a6ded6ad676989e3. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/ATM051817003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e5e5ca9de82c564fb8b9bd6d7e2c9e2a48576f926f2699fcfdb0cf5cfecb34. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ATM051817004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce0843df216d30bb762e39a992c11fc4a4388540add448c23492a7b14b8dd62. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/ATM051817005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec03168f2992ad45f01019c27c715a26349dda3cf11d6f77e94edcf8293a145. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ATM051817006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa38614170c20c5df47b0d3e7c2fa46afcbf676270433b1e6750979b6bb0283. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/ATM051817009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962c6c23862c8176a587eff3a7202e4ec54db12d69a6f1228ba46462ce80e4ee. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ATM051817010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2fa3202b3f54f10d646cfb27994b8b8043435870293f6e491787ee5611ab51. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ATM051817012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988954e6ef8e83478f026edff741c555b1e6373b9ce22f9216bf0b9e1ced1852. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/ATM051817013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c589943c16d90c76e2ef38fb22fce92cc96b606b31f3df42d128ad1b2dbc20. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/ATM051817016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65971f4be110d2a5599d3540efcfa6186bde3b087bcb85aa856e9a3ad44789b2. 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/TCAFY2176502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd957df760d24b93d3bf9b5e9a162c9623956510814e96906537c3fe2935516d5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEEP82000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1aadc7bf7ef183d9490a3a157dfae7b957c3d922ad1b79aaa90c9c837808a2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEEP82000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa677185572afae91edf91d9d0a64157372701ecaa5eaec8a26797b0b1ec262fd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DEEP82000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128a919619694e169ffb8c1470d8bb94847ff0eea82915f5884d499aeb853187. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEEP82000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ef39002d108c380a92c41cf9b46112ad85fc2ecd14bbe78a73fe9b91bf18b0. 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/DEEP82000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825135ad2dd29872ea547580a2429777c68b10e86fe66dcd7e657ff043c6ad87. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEEP82000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25c8048d36474273f34a9f740a956d41c8f9ba164ea30a5a382e48f149128ff. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEEP82000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715da78be6ff9e8cb771ef29ad4fd14de2db7c3feaafec15cdfabb249ef2835c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DEEP82000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef932643f113607f4334c4d6e7a265fbb9a21c6c9f73ff7499367671326525c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEEP82000096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f0e14f982e6b744bad5b8b8a2266cd419d880e07b5b61305e7a994ada79321. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEEP82000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088cccc53ecd062395556d0ddc7b6f3164dc6ee4bf2002491fd759fbabdf78fa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ATIJ72200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ce41e5981de3c7d4166f5894b1ae38050775e26d21f03f6c562b64115f7af0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ATIJ72200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399b9ae46cd4fc32bbb9c2dccf988dc24acab21932e9ed7bdf54f02edaedb4c4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ATIJ72300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8355eed89be86b177ba13d86803a474f627ff05a6730befefa16140bc8a0e5a. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/ATIJ72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b1af7179c05d76feaca04f2a9a10a6a5682399eebc4181013017c4ff440a9b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ATIJ72400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc659f3d98040172f5bad835bfe53ec0b4118dcefd1d39cb320b19e0c58b05cea. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/ATIJ72200011.