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 0xbb784e408a975a33761a34e3e32efd85e43ae953b552e086e200ee84c20af732. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e335c01-29b4-4fd2-b471-df1cec3b8f73.json and https://artists.proofprofile.net/proofs/artist/5e335c01-29b4-4fd2-b471-df1cec3b8f73.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 0x0c2d49f97b8c60fc39f72fd8ed32b5e060bc5a6c3681bb154f448acbfaa26db2. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:00:29Z), 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/BRVEA0100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4d39314f4ee2c4ca18c8f0be60501b638db4ad4f1056af83ca30918641cc08. 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/US1ST1832001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e6e89d6300edd773ef016505386d8e07b3eb1b1184f4dddb2513ecaff3bdd6. 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/US1ST1832003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d753b3f815e475314949dd84fb1c73f5d0779c19ab4bb96a1095144385fdbc2. 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/US6LQ0900656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914ac9b02e5c698ce8e02a4a372ba66469b77e1efb4674b6708e9365f24b2c5e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/US6LQ0900657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48abe675d40844540d67019eb6adbf4ead86d78abcc08b809ec895fbc393a3b3. 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/US6LQ0900658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798b89a60ca7ab176d230031c6d1c2049255639ed28b19e66fc15647367c8ad0. 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/USJAY0900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd179f6f7e95680909326834289646ab52536b1740ebeabbc399b7f117214db6e. 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/USTB12100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08827e81ee8cbe9408a48cd35a53a89202334249f2f4da9222a77f27f2c32443. 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/USMO17000469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03d6ea3d90805d04bdc492dc2daf22b9984f9e17fad37538ede8e9508210aa9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US6LQ0900660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1aff359cdc822f82580e8f1a69c0c17a757fab06d772c02ca866807d0f229a1. 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/US6LQ0900663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517a7f23fbeff70717d791f836c7487218c5f206c18e1b7d047b31aa262ed320. 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/US6LQ0900664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eefdbc2cc9c6b199e54afb7f682d007730237e3853e49cd84d042073fa415df. 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/US6LQ0900665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0f759d4afbf52a344c821a0a41a7538ef365859b5cab1e5281aa0a1ed99068. 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/QM4TW1537770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1277ac385280af4d252a9c8b9571f9afb810d2f2c01a3206ec326c394f9b43b0. 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/QM4TW1537774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f1311c57b2c2e75b2715147cafcd4d1137c7d37f01fc6b27fe5db0bc91bbd3. 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/QM4TW1537776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbee62ff21f82a10d7ab813a4d891d2f130d6015a551bfdbf940aac2ea59a719. 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/QM4TW1537777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3aa93d7b61d77d2c3dad403d0af0dd706ca92742c085ce6263583a45229da0. 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/QMREU1410110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33b9a46359834d2d5ca27f68f66f34d8beaaaab7b71b5445ba46e821d208582. 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/QMREU1410111.