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 0x96bd7d7ea393234e46e396864cc825bb90593652a2d0002ee07a76ecee57bd59. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f976372b-6f12-4255-ac47-784a51bb008a.json and https://artists.proofprofile.net/proofs/artist/f976372b-6f12-4255-ac47-784a51bb008a.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 0xdd19355452c761e85f434224f65bfb43bc66f7c9cbce63b60fb123f12149aa9a. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QMEU31914440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb568dd16f8da87bf42c30005e06097613bba606d42fc272cd354a8b187b92c. 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/QMEU31914442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91858380a6f79b848f54218e06bb16337ced234d0ca276aacb4d272679b77e69. 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/QMEU31914443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570231356fc5d99566a66188cf4d8b0bcaa8825f4ef8d6d898fe9a48a31b5f17. 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/QMEU31914450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ef42de98a28b753ee51d89a0500ab14f8ca2d2eea85170fd87196bc6e3a914. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMEU31914439.
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 0x6e84d811f2c2b202bd8c47a6b7b491fc580fb6c3df98aff312d8c715629a6a81. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QMEU31914441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2e0e18f869b3336bba07bd504830932011e3426d7086474b1d93b392bfca48. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMEU31914444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412ca78644ad70b96f29f2f149b1e6bd2ef5d6fbbcb28c536859a27af8403053. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMEU31914449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511bc08a5243d19503213020087e36bea9bf61ca3b5b3f6d1b0baf7a06656596. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DENZ51601103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0d8910fb73b60c8085dd998e493b224594b3f0db3f47083f48712911d0bb80. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DENZ51501106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7b1dc99caedfa5975f028a98d013b54ecba0d2520e12f85705c1fbd3083ce8. 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/DENZ51501108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c8a5e3dcaf6518bd74f284e29c6ac8667b01634b2f59d85657bb68214fb6ec. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DENZ51501115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3b9d21fce0a58941c1d8d735e12e5868848ca261816a3004b4600768cdb891. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DENZ51601101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8562af3adeaff8b7383e1c8ee115271e88bb2f7ce880c5ff25c13fc3b3243989. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DENZ51601102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a18fff11a9bd1ddaac7429e73276bd6e543f329ef173190bc305af722090da. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DENZ51501105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0078495fbc0889851dece94d44dd15a43c52da83ea3f6f5d277b1f20c7231fd2. 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/DENZ51501107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe530704600b707a858ef62db970fb31c5528c1347392c3e54072ecb0ab9c9ca6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DENZ51501112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcc73755ef50fe1beaf39bd46b0286e531a3dd1b14852b0893069c0a7f2c02c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DENZ51501114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa728cf28809ef762fcb022cdac8fab4b8b6d5abf21d2b984fcbf750641cdfe38. 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/DEAR42147659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42808b50aa8434d02c33042658c9bec37f24da2e644f5f1c609b751e0cbcdf88. 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/DEAR42193006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b08bd00a456ec75f11855a8429ec7b847bf313707b2d7fadcaa0c05254b223. 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/DEAR42151188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85c26a959f61e23fd4b50f946810c4007dc16231ebdbd272b82a1db7d6503c5. 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/DEAR42120310.