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 0x7c93ed5e33ec8cfb2e254aed1977c0c3725f3b86c38a37dcc7586122f0e2ac18. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5385264-cb4e-41af-82b1-104dff2bcb59.json and https://artists.proofprofile.net/proofs/artist/d5385264-cb4e-41af-82b1-104dff2bcb59.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 0x89d32cff955389a2ed81c839fc234435637b2ca4c2e5930302b754150f2620b4. 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/QMBZ92387811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d09627eb9f8a0f6ea73c3dac7c4c68c8e09a85754059a17c6671b77ba6e15e7. 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/QMBZ92387820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75cf51506d246b55def831e923c3d98c1f752336b0abf095f2b346751fda28f. 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/QMBZ92387823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcdcf1a2928589ee5cefb396a5bf3b46a0d43bde4a587b0f7504c53bf4af896. 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/QMBZ92387828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0286f2996360d2cfbe2e1d2dd01238cb9ad26e4029c1033b8af928c18f5ae649. 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/QMBZ92387831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311bad66111fdc8e8de6f33d338c3bae8051914045a20b542b1ae722a398a995. 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/QMBZ92387849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42ff027c16d5536c0ce8c6374f2fa7f632a924926f04e65d84f6ae74fd4a94d. 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/QMDA62363308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a4561ed2351f2658fc4cf89b37da48df32e25e7afb47a91e3cd010d43d1566. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QMBZ92387945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755e56f22a29d7bbfc82a06e347da6588f4b85e489a7a40e6ed004d7d0e456a7. 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/QMBZ92387949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d13fb0324f81c98b3f95682197f9c5107f18a3cc8b8ea634f288e2ddab95b57. 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/TCACJ1563099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e40e1bff1eb7e2ac7e08c92d38e9975d56dc7105cbf8ad44ce82658a6d0c64. 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/TCACJ1563101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cd73466309932b78b72cf8883a551134b5ea017282121dc71cc04bc10be0a2. 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/TCACJ1563103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b9ca41fe9639e5b49f23bfb9ba5d5496f81047c5d08221fbd0c64741744704. 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/TCACJ1563106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1507e02a6ee9a62549168f15df5a9b310989b245c675dfb6e78159433abf3a. 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/TCACJ1563107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae1b60791ec15262c25a6fb3a891bee96e10182c62f051f6f18e2c3389329d1. 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/TCACJ1563109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad38d4b8a8845ee0cc1b0f72e00ec19e017532dd19507614b348e186f93e821. 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/TCACJ1563111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e4260e99fec146a6a1a4ae78fc234985113bb1880eec1c6adaef9697036330. 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/TCACJ1563113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c1937bd98e8fe67b8bf4c01e93a94e7aa1ddd381637f3dd91447aa7672f901. 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/TCACJ1563115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8e43f9dcaca78576b01f37805f09be267d3831116fb1dd2b7b35ebac91e392. 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/TCACJ1563117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d768be15c5922875ac0768b3d50aa8cd003e0f31daac8918fd3f6a3f056be8. 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/QM7282345563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6633be57b2ec55dcf16801d66b946560bb9fe134445936e3765b4c519b4f6c9d. 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/ES71G2220248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8af59e66e97ca9346078de652ddae4882afc38f2c1cb4c2e3134e2364505cb. 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/ES71G2207862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30ab16ea8220875700af1deb540e1259b116072f91c8ca861c34dfa783c899a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES71G2142666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66787c53b509209488447ba84d448355fe496e26a10be2dd5dce6589a4acb69. 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/ES71G1950349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b37c7c4963073808971ba550db49646c0bc88732346c2c0dda573bb0d1a64b6. 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/TCACP1663372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb469345f7bb4c4d08efcadbb736a5532aeee18c11698080efe3fc35234b1f999. 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/TCACJ1549360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9a8e2a107bb739c0ddaca681b1739c8692bd4e9ed42a41d79323186b2a1a6b. 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/TCACH1541274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43179c1795dac4d258fa6063ce98d54de742a9c8efcae80b446940d72d4d3ea7. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCACB1474747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a108ad4e6012e1737d91212719104a3b7f88f0d371abb38571a06f06517f17. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TCABX1412356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2232e5194c6a554316c9df2d86ef8b99d9043d47db14a40aee8e6f5b54374e31. 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/TCABQ1362154.