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 0x2c38f55fd044d04c6167d041e539dcf11398f6c31b8c017ace57a20dbcec91cc. 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/99e21b62-8001-458d-bc3e-1b414cf44433.json and https://artists.proofprofile.net/proofs/artist/99e21b62-8001-458d-bc3e-1b414cf44433.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 0xdb99cdfcfc4e0da6382a7dd6a4d6708c4d88af7521b4f200242fbf36d6767320. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCABL1345671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4189cda9b870407cc58f441af6089a6a06e69ffba0958766ce7f67705b7d66db. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCABL1345673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5678e3c402e7de9ce152eb51f48d8c13fe6418348acae7d824ff57903686f166. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCABL1345676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90295d48642b0c6eade107cc25162b0575cfc0b890c3f3397ffd75aa17d7017a. 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/TCABG1284146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7254f4b69f5f14fa0841de6a1b14dc1fed98f128d4353c43051af58c517df6c1. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCABG1284149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8938419a62039efb4d29c3462f61297eb3e5319dd75d5670f3cc430aa41e53. 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/TCABG1284150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fc8611ba3b7e093c6144567cc709231748c821d098eadfc4f83c8b7449a69a. 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/TCABG1284152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee3f9803b72230e784a6fe83322fe6b82c0738380b317498038981df7f31f1a. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/TCABG1284157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8582a6c66788db1bbb4c91863e553061e049038705ad89c350dd1219be415c. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCABG1284160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00026e9105498c1517f24f5a9757fcae8599929f795d696adbfc60242b1c80be. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:38Z), 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/TCABG1284164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e860ea765d3101267150f4d32b64ceb1ff43f456f092ed92633b3aca77369ec. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCADF1766849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021170309eae06cb3a70aa7dc9f0eacdb5fad4dea8be4ff49c68628ca352feb6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAEG1967185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c160e57f545fe7c3cfa47800b1944f9d74f1b72afadba0ea9d1ffc32c8f8917. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGJ2013284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170c33bacb2332916f96c944b085c8db23b6bd33c2508b44bc198b149d7260a1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4Q2083463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdac636d91fa8541228dbb34ed33df322dd382c8250ba27652b77e557075266. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:43:34Z), 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/USCGJ2155373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840ab6dfe4813e919b655eb6929dd340c415f4fe032589f3c99d082bbe9974d5. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:04Z), 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/USDY42395533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d1c65b4778d8e467f0920988b2e77350c350415fc6d3bd09cc53047920b213. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM82390617.