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 0xf35ef883938ab2d73a29ef22333a248e751815cc966754fa51c76347a0e76b9d. 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/f6bd5b6e-6105-4269-8223-b4d1bcd5cae3.json and https://artists.proofprofile.net/proofs/artist/f6bd5b6e-6105-4269-8223-b4d1bcd5cae3.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 0xc04d92b7340233a2ea264bb57a4fd76ac67be5530bef420f794c5de4c635a453. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FRX452031236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0d620b9b894c3b35c2068283de0ad99e6da0cea42ef412da31848f532f11e6. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FRX452030820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb3b5939f6e11ed2d72c8475e359068e4e3b5ccd15cb31681f31a2677ea8f56. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAER2062490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9538d25d9dc6a59be7c81e70639efeca39ff4fde92a161c720a310d216f5fb2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX202017287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3319475e27e1d90d8446a7161b4aee2f636de1ba296570c8523b9a66aa763b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TCAFM2195544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3585ec34de696ec31f95d348b14379e6a3aae735d6b8c2cf5bacd4814456399b. 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/TCAFO2170356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72235ed6e4a3ce5d4271ad9ee8b7e28d0e0491049cd606dabd717cc9995f21cf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFO2170361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebad51d03068cd446a25b05daf85fcbf0c987bcde1ac6e90627198386bb81b0d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/NL4NL2117759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6e600ae714676aa9d2c9a9c96ccf9d046256bc8ea7660f4076a9048ca47cdf. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCAFR2144529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244bbc069d1371bff43e327cd8ac4db74a196303fa973cfd9c54f9462ad0404f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCAFW2148034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abc5e5fcc3eb767cf7d85e66cdc2e3611944e35dc56587e38c9e94d45c85832. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/TCAGB2296934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc373e1e3c7722a9356b173b6da4420cdc662f432fd9d31cf12035a3f3fb4960b. 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/TCAGB2296967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4bdc20c83adbcd6b71f969f5352597c07704cfcbf6593d261f1ce88dec6d90. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAGB2296977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4b68112e3b5c9f1c83bde9b2fb504a770f1633e9070ab8a884a77a7db30a7a. 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/TCAGB2296998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0262296da9393cc7338a9656ab37a8bafce1e759d1dc618a798d971854f53eed. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGB2297004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f6b7d193f56e0c41c42c89de1c1a3e6280b393af84d6e083c5bfe59d1450fa. 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/TCAGC2264706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd694c9e1839b12be4b47200a5f1195e352d45320c849b4e5520065e080461c3. 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/TCAGR2273820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726eaf3ec9a7455790541e3417609b8659c330d859170e8a7d648d13b2b49f55. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/TCAHG2332946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff48c5b6e2d8f9217442a8abeaa2f869d6f3c509f42b67b2dc53d180a0cbad5e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCAHH2348335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe589b75415fcc6a5273937a09dbb1a35eec55f63c043ee0f1b0a0107e9a1d6f6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAHK2390932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eedb12b5d1aa5f4bdbb395418baad389b2851e1505604f10e7e5b97d46d05c. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCAHQ2320529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67151aedc177d348d7c56a2351c69a963009847c68707478eb8d1ba8d0ebca0. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCAHW2428712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed72eec95a5af4df88cd369255981d5179b0ebc5e48f05488c35acae1da9d2f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAIX2417056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17331422c4133a9288b7d077cb9db2243c0160932505bbec33cd8473cfa4d4f. 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/TCAIX2417064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6978ab847264256d9759073f2444798abcdf745a2aa6563fa1b7e6f18d3aafd5. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAIX2417072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe402615f8f1b8c2753bb694a1ef93b05c222940cd31fed68c3e7aa5aec9f50. 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/TCAIX2417116.