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 0x5caa2d7ba8374bccee0e8d64c30e4658f82097b934a1b6a3a34dc30bd3961f08. 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/1d38e598-58f0-424e-b7c7-608abbdf4050.json and https://artists.proofprofile.net/proofs/artist/1d38e598-58f0-424e-b7c7-608abbdf4050.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 0x510cdd618717fc01f5a8cc19287c388bbe80e5f0b8d876a3765d455bde449345. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USAT20201922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589721fcec30355c914ff9cf1906fea84e50e0c5d4dd2ec50dcdca2949c6ed08. 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/USAT20201926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6462b764bc1f80831de3cbd87fded0790244e83780c727ce8b9f3e77877d479. 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/USAT20201929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b90f8232c64e2f4be72283a89f24fe891d4ee9e9b66a0b911e47aeb4985cdf8. 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/USAT20201930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57626b73825baca62feb68ee8fd88dcfc8091d9fd7fc9b718175ad47e001da84. 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/USAT20201932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c3e49959af892daaa5b864f564676ad70f3832c2a8166ec08caa86fce6a640. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:49:09Z), 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/USAT20201933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b7001376adee6e4db4acc6d2857f41d9873e984de1dcaf1e19479880870d78. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USAT20201935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef86ce0c1196fa73425406e69a67bd9d041831f9345055fb8e9642af2a60fd6f. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USATL0200391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89aa8415d7878290f5c0970f95f9582b08d6b244ed3e09ed72e3869ddab7bca1. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/USATL0200392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdb9ec11d967576606c514853fce70b97785c220051ea3331e08dc78f580b18. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USATL0200394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7e6b4789879e6f11e53699c01dad39e49c4abd61e5cbf59b34731ab9e82fd5. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:21:20Z), 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/USATL0200395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2503e64c390200b5e8549d9f4824a7605c5c3f7ed46fb65541a31ef481a04e48. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USATL0200396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f5dba580294fcc25ad2dfeac2cf1ef7b4bd6607ef1e3118d5e600991d3862d. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USATL0200397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e9d148023659e01668e3e2844ec264b3eaada57c87e93029ea69c671b11093. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:26:20Z), 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/USATL0200399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1986271b387816cfdc6ab736370804be1a098a0890efebadbe0386e1e692afdb. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/SEYOK1711036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa03d811759c82139e6cda9c1c58faec954db5ea154c54e98da29a7e22cc38ec. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US92U1706406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850adb9a21e0b622580852498e373faca06bf860fba75b0546800a4eac525991. 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/US92U1706407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109d59500990c63955cf231e90c3ebaeedd6429b585a348fce7425ab758f6a02. 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/USL4Q2218910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605ef0334eff46cfd23cb12aa0441a328d28beff9a1ac9fea7ff5692d4b9715d. 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/USL4Q2218911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7812c6fb51589629d5da79ebc51085b0c17db4a17d5c80e34c20a5ff7f609b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DELJ81622175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a67d831bef8ff5880cd6a4c2eb4b2345c6347232125a7131ee37654ef362ac9. 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/QZMER2270826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f8dacf96d3c953de2444aeb914270fd6fa035434dfd9fcad7be464300f9d70. 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/USAT20201923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf556cdbde39843017d007d0bdc46ddaed9b9181f5fec77b4e549425664564f1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBMJG2100943.
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 0x59670ffa3f58b9afc855f3380063f6889c44e5a7a8627bee600749961cadc0a6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZNJY2224177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cad6bc7c1af1a16dda6acce3e8578242fdfbb97b4ac72386a23f7ad3686e9a3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM5NT2300604.