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 0x81bb866ca405aef43a98eabb5efde6e17050122ac08671cf5a57e2c887a39147. 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/ec46dca3-9b6b-4799-9599-f32e01f3d406.json and https://artists.proofprofile.net/proofs/artist/ec46dca3-9b6b-4799-9599-f32e01f3d406.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 0x08da01006a775a2c5ab4fb31c4445fb24e8ed22684eca453f500725307530152. 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/QMFME1548034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e98a0f6f64dbd4270749a7f8f9050c2f02eb81d0bb3d559ee28af073b852b73. 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/QMFME1548035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ec00e234b084144c1d228aab6110e5eef898d7f0fa7ebbbda7f0321708cee7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMFME1548036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52065e043ed585151b7944fe7db819dee1883147f03db1ee9e20d77875b1c6d2. 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/QMFME1548039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d93b292e6822efadbb0f41e0c84bd3fcd182da9862e42fca04719ac42a4a3f. 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/QMFME1548041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1620b95ca4b148dd99256e7fe30d4c68326badb72bdfeb5bb7744836095467fe. 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/QMFME1548031.
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 0x507678bff6d1635ef3b205a1f167dafaa4e8d83c6f2af9997868ad40e8060b3a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMFME1548032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6746f983f0a4423b762de5e22eb38eb13a3564057aab6b16c09cf11d4cfac233. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QMFME1548033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd562abdb1d116ec68cfc35656b8263f4ef0a55ebcc35a4a62b4f5a72b671ba. 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/QMFME1548037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1dde16f35c9dcc4f98862d0f57f10cd9dca377a8db618f7882d7caa768dcfb. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QMFME1548038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cdda7582139cc76b05af2fbae396b07fe5acc26c23a415beb1b58b62bd9ce9. 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/QMFME1548040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c05a7d860b9a439292949314f6b972b490c1c6e3e26562a40e84a50467647b9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMBZ91329959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc658132b91b6cca748abb207a98e9365875e70cbce372653bb95aeb4bb74b6c. 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/QMBZ91329960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900e580d6c83b564db8144ef68e58875c6e41f8cf1dcd100971bad1de8594b72. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMBZ91329961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481b34f628258e8a255fa437941bd2924335ace66570a88f46812f947ca73383. 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/QMBZ91329963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281dca99fddb7021c7667d76089636ace1c66563c58f767b760d7bcb53065d18. 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/QMBZ91329964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30345a8730faa30a1a0d8a7c39f2b90bfda3a148ca0d37d51703744d27067377. 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/QMBZ91329965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bad28ab79b7ab9f08d2950fa3d29a68b5f9c6b306870f92d94774f0bd66222. 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/QMBZ91329966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76d9979dfb0b4c049bfde3eb03d7d394d7e2d53896b578c45793821c1f8ab9d. 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/QMBZ91329968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2c7d8994e867d7210877c79251ec932ba41bb3a6a0bdda9fefa4f708e56de8. 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/QMBZ91329962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3aab73e252d486fe4cd850b4ee3170cc0b9e0e5ef6acb211df3736b606a268b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMBZ91329967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b935cf09f95a3e5980278139c79f689d599ed41a9a68718a7ffa2a80be1c478. 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/QMBZ91329969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c41f8ea5a7c653fabe32657054c14a0185f072806bba46591fc4581cb188b4. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QMBZ91329970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba2e193fa68aa0f5a646e528cafe0b632bdf25d98e6f2cc27ddd265c9f2fea2. 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/QMBZ91329912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30954c99061c399003bf4ec863e3b5b4cbb21bcd2f9a4bdd4f13003ba864d4ce. 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/QMBZ91329914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe661e3b648d156cb2cc36a3ef96e016da609f5c1eba1a7403f80d35ed9cae06b. 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/QMBZ91329916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9ca0ae94a6292f0c1d442411e6cf585f80d2013b53f4a97431c42a90df403a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMBZ91329917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0ec0681790bca7274678674ab6f503c49f34dc49efae7ab6b21c2a93981987. 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/QMBZ91329919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7566d34f1ed6b9a6473366f37ebf522a0d50c13e3c8c9609070fd28b213652eb. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QMBZ91329911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95185f89642ad21a80178bd356d657ce32e549c6520b0ecb1c36fd92cf995f4. 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/QMBZ91329915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfab79c59f5cb388a7193030941281a4c3c9c82a978dccbdbd65a64e807f1ac. 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/QMBZ91329918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91760846e4dcd8e567200d97fd80b0fab0afa8fcd8549f75645c11edd393ada6. 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/QMBZ91329821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021fa3997bee513e11229efaed45f39611539cb8b9bf1a660d704c3168b21ff1. 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/QMBZ91329823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7d0131bd7336e210d898fde91401180b146107af6916267d2525f61d9af064. 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/QMBZ91329824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862cec14c5dfdad02819a2f016b64eedbac29a3baaa6872bcd620fe9b418cb35. 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/QMBZ91329827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeaf8eaa4522eb1a910c1af8e4dcf7d5d921a20c9c5f760d113a68e52458b5c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMBZ91329822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7656f35de322d3fb463bb5fa8d93d73d302b575cdad0af421468fc54cba7628. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMBZ91329825.