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 0x7d033f70fd846ef1f34d7d2d0603eeecca897eba3203a51baceaedc467cfe4bd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c696638b-621e-4882-aecc-d26808fa447f.json and https://artists.proofprofile.net/proofs/artist/c696638b-621e-4882-aecc-d26808fa447f.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 0x170a5b145fd122e2d37f09ba5f3e2d200629199ea5ebe0b2bf974389b26ee294. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:04:45Z), 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/QZES92082190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aabafc81f98c2ae4156e260f910f1140a1e8aaebac339314eaeeb87f2ea688. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN42026422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417ccdaaba8aa873372e8a54b8d46a3c625dddcd8a6fd5ab91d7f03f66009860. 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/QZHN42026702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aefa65b3722fba6027037b0e6e6de6dc1205d4d223dc613d5a8f51f68651e2. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZHN42053109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429508e8f110a2bd07f0f51325ea0613d41d3757967e7e46663492bc0589d8d2. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:39:59Z), 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/QZHN62048883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bb8f626390bbbeb31d676d84e1c15175cf00c14b817f3c3a16ff18a81f402f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWS2078540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe444155ccdd654095dda132f9faa92c966e05146813b67be5f797277f7dfd0f5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZNWS2078537.
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 0x42c39100f0dd71b335df6c22828ac061f20b66e27f907e379a34161fbf76eb97. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNWS2078538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce4e6ceaa089e0b206707b1507ff6faa56756431dd57da388bc1bbb1d8ba5b2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWS2078539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97118432eef229cdf2eb08573e92a23f4f5152e1ac25cd7e2bee7b42d78ce689. 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/QZNWS2078541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d8664bc6eea906a20a542f9a4e2cdf91e9f5cafb26a3bf0cb2906ea1dc5a60. 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/QZGLS2148307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0357e4a5cad11998c8c77ba1e9816d0a81c6836d9c1d93809dc72101cb25da0. 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/QZGLS2148303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090b679926276ef6c1642281f4597e742eaef12b38edae8c1814d39b0c169723. 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/QZHNA2224916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4c3ea4c674ef94693b76f30faa1993612c367ece2036279687d9548378024c. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZHNC2289811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15738fbf2cbda56ee8aeeea8f1ea7edff1ba39a4452fc9083be7b34b846ef989. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZNWU2360923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd325bc11264b8fc7674fec447ef05898bb9d4336bf7b0297389b287106e923ff. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:42:50Z), 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/QZFZ72493693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871cc3ec836bfa4585f227609586d3760a4b25350624a10a5d2d66e4fe636a1c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNB2577119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec487a510000f716a8709acace0ce042dd95b68d9ffcad42b072ea890f81f1a5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:12Z), 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/QZHNB2577120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b8054a01df56ac6f4fe7b81acaee2c43ce77b2788cfaa0ea000f888911e975. 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/QZHNB2577121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98e535f715318b7bc95ff6251515aae6bca98d777389fdfd13bbd89896ac9fd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHNB2577122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980f3b4cfd98a628aec8a9e9de21f79074b13bf1dcad93af3e19471ef09e89a9. 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/FRX282312060.