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 0xf58734b5744f6815e58c29431099641dccc84fc705bc74b0d4e5f3de29e714fc. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e535c23-0f04-477e-9f43-6d941b832fe5.json and https://artists.proofprofile.net/proofs/artist/9e535c23-0f04-477e-9f43-6d941b832fe5.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 0x94e76943fc5f94590eb60c9451aa0211fdfcae5791bd6b84678dcf74446b41ec. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZNMY2206430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c26ae3413b3a9cdb4564de2a9654d838aed2739d7b87bd22acf0a3d9650260. 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/QZNMY2206431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422596d65c24d9ddd885cf0fa8b29bfd3a3a3da712896cb8c81fa6665797e813. 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/QZNMY2206432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3363c64f6d7cb3cf0382543453fc0a5798ed0e1384f6810e81f8c442f3a0fd6. 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/QZNMY2206433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf37921936925e314dfeb3ae750aaf6ea009dd6c3557c9cd8ba74a45e837f6dd. 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/QZNMY2206434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283f53342182e4788b9ac008ab2bd3aa43412771a87bd393c2490b14a1afc353. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNMY2206435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f4066811fc9ec1c221bbdadad893c22b9030648a9eb720fdc561cf8c506f68. 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/QZNMY2206436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e92e5f9b20a136e5b2e4785d8e94c1d92ef7bab0dfe40826dfcae2f58052ad0. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZNMY2206437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049745a336663072b00b2b7b5f6419725bdc34ce2aa4f76c87b3b2b3262e07c2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNMY2206438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb52f478f4d7439482c1536ccc302dc1f715846d2dc2fe6841fff62dfc490ef. 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/QZNMY2206439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0210ebc63585aed5c26c721fe64cc7d001699c7d475c6453f23f1171f6c2f0f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZNMY2206440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364559748a0a8b1a3ec34167ee4b6baeff61e1dcc4515ab491ff08d51b7174b7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNMY2206441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c2f93207cce447baef5a450deb3d643f5d6795ebad82e33f10b742baba134a. 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/QZNMY2206442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d050f80957d65870d388eba7cbf403a8ad8afa61c5cb09be5a7dad12fbf011. 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/QZNMY2206443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01aa48bdeb09b30176a03c0679e21959a71a9d9028ba8c12870a71a82359ae83. 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/QZNMY2206444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b424e83ca91e0ec933f39a0fc98bbcb502799ce7ad1b9134333b1bac7f8d0b4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZLL92516420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5277518af526a7330b91731e43a60e3fc67bfee90872348081e6d8122be9fe. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZLL92516421.