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 0x5badc8d5daf3ba7009ec239fc91c5496c28e0db2ed4c87678735bd2fcfe5420b. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55750680-f060-471d-8fc9-63c65d0ad636.json and https://artists.proofprofile.net/proofs/artist/55750680-f060-471d-8fc9-63c65d0ad636.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 0x323c108549ac4e721ad83b918ee6e73eda9204bb73d5357d70d7d5cfbcb27e15. 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/QZNJY2179656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f405c20d2c1274054db2aaaaab6710bdc08012080a8415b7752495309424bd. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZNJY2179657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeced9b7c5f902c10e1f3cc72041fd6c656443d8f33d37b62291f22ad902de0f. 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/QZNJY2179658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863a9181d4a415529e201e92e085c64c1bb4529d1d440c6107201e0ce527206b. 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/QZNJY2179659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b627ddb23199b5bc2ef165da1a13442a08a89049d180a29bb80ec03c5d7eb30. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNJY2179660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c05479513960080ad961af8fbb3bdba2c6d0d89fcbd285348c410e6e2a210f4. 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/QZNJY2179661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220a67852836ba2efe2df0963269e35b13d7e4e4d5b4a4a9067932cbb9d67ade. 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/QZNJY2179662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabb7ff24b979dd81df8733bb87d1565420b3e7307af7f9d7b61ad65547fcb24. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QZNJY2179666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07492259c89f519cac651d83051c721672ca154db2a677bca6d1cfa41ec4ccf6. 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/QZNJY2179667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b2556d6422af0aa7fd1ad12eb1c1c706d7c6c39bf987b5235b5e67e95ca960. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZNJY2179668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4020f20dc654e8278fa162fa05adce0fccb6138846dbfb846e4e9f0576036f8. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/QZNJY2179672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68ca686f8d6aeeed71229e01265a1f174e4d78c81e2b25ec8960a0faf5bd2e2. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZNJY2179673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ec4fbe6bb5990744839ca5bbdf2eabf93215f55d0cccc910a2b284795a1056. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJY2179674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19053d103bcf83b0a2c4225ac95c523672a8c529640cd4ad8430e83dbaf5402f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJY2179675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a2a9affc653642ace29450091515a6f9444506f34e295a047f271f2f02d322. 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/QZGLS2414783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b7b7e5bb35d2d6ca360455ea41a7922579eae9daab7f8434874e276221c370. 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/US7VG2465010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951efaabfa3bbccdd9f8952801bfdae38440d543526245174e166c607a709239. 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/US7VG2445021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7217478507671fabca5ae93e5f5c83dc7b33e6ee8b0fcd75a4d5fc988bb0cf. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZNJW2396689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec2e7ac209a795e36275b31e720da58f4311b4077c9dabc30b3bac9aa5bdfb4. 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/QZNJW2396690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada6c221d47b6471696f3ba619483e04449eb71e6a4ba892d358e852df4f598c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNJW2396691.