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 0xe40a11612591280f54025f3e177823b44c53ad060462bb258662a93f8d569d65. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db65a05e-60cc-4e77-94dd-8bbdfee108b0.json and https://artists.proofprofile.net/proofs/artist/db65a05e-60cc-4e77-94dd-8bbdfee108b0.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 0x8f9e88a7ce3f36c892dfd8c10ea63fc65a0a730bab335bd0133df016096c5c25. 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/US6QR2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70178298f2011d8812725fd0b3d54e5bc91fbc15b5bcb123cc25d808763e108d. 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/US6QR2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69138a47b4018bfb0ee387aad3d15292bf6972ccc782052b0fb6dd8a0ff20f2d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US6QR2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564ebc68be6c679e416a98a9888b2b938029eb6625d4717922c240909f76ef2d. 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/US6QR2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c12db52c1682ce07b00ad43f1077daf8913ade88c293fbcf198c80ae106c488. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/US6QR2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9874fe1194f68ec14c6dba47836d88fd12e4b080f025a5974d61ad09b9b55a. 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/US6QR2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569b3e21a0caa872901048e36532e4c73914210b615741f4dc6437f54089014b. 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/US6QR2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcaebd990cac112d9258614d4e22d9fd13cce76a5e45337ec22b57902c0b31c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US6QR2400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53be1c1a17ed8c287247df68b243572dd6d818a2decf8d1af549bb967eef8227. 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/US6QR2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ad2a7b22fd0f298eade86310a383404d2bbe255663b98dcff499b872e9b85f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/US6QR2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445314d5d91a8f838d86e4ca9f93f6e1cc69b25af4e802c06ef1433722bb5eee. 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/US6QR2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e9705341aad16e6ffbfe3d433da33962f6fb4dd7bdb095a77637ed00a7d757. 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/US6QR2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fe3e7fd1a9e4f1c4a98d50acdbd7cc067145e25f1416e096d78ddb4750967d. 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/US6QR2200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b175c54a8e0d7b738a782fe918a459b79d0ed140a2bed6b61e329709d579f5. 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/US6QR2200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4237e9936a1136c5b801017eae4c582a2f4343a27446f56ba69fc15d9966391d. 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/US6QR2200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d9fb6a231eff045295ee395cefdffe7adbea52e7b0f8c03cd9745e7670f02e. 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/US6QR2300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a91a3e1f55cb4cc6769b306f106802a45b7d821ca32ada19e61a2bc12279f9. 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/US6QR2300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8f848e2b28ef5687570ac6aed375627785c1626930b2eca1952f179b948767. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US6QR2300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bb2dbcab550351a1bce39b42c8ebfaa8027425123f25db639bb2e069886a51. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US6QR2300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b54def98930f318dac223a051793442a448a59cb7aee608add758acadcbcb4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US6QR2300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e0b824e31c50aee36a6c45335a61b7fe208a10f07ee54193a08628d247b4e4. 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/US6QR2300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13100206f4ccc64f8927ce0c6e67b6f889a7d8b7d30c54d843f132360eacf67. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US6QR2300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb731e70460fb2b27cadbd77a5bfcba1fabbc469520468880ba1b28a8e15905df. 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/US6QR2300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6536e166a0a53ec33e78fd30bf09e948dd8e397601cd1dd41bc91d961febc4a7. 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/US6QR2300139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ff263c459e66a7103d568ff017d53790b3be1ba1a9a6794a5e0fb994978cd1. 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/US6QR2300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf70c87d1341cffea0900a32d8890c47e5f93ae9f2fdb59c380268cc5e40f423. 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/BRH202300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ef2706a15e90fd2d95b53c68630661f15b087adfa73efa6579335ac8d3b66d. 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/BRH202300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60a246da30375b79d3f764fc31871bf3fd05f59a51f7f212480a703b352f1b5. 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/BRH202300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ef2706a15e90fd2d95b53c68630661f15b087adfa73efa6579335ac8d3b66d. 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/BRH202300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e0ceb1726b1f0f8b49b082a34179766c34a4da0df83a25c9c0f1ce7ae3d7c4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRH202200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd355a3f2265e9e186ecbe1c716072f821d470227e94bdd0e669f48543b3193. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BRH202100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7122c0581f86bb6843dfefa6834603fe0a5d6af5e5733fdd4038f9ff4c01b414. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12217685.